Tournois : 21 | 3,164 parties | 9,862 vidéos | MAJ: 12/02/2026
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  • Image indicative
    • 5.Nf3 h6, D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D53a - 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 - Queen's Gambit Declined, D53k - 6.Bh4 O-O 7.Rc1, SÉRIE D
    • Siegen olm 1970 – Round 19 – Uhlmann, Wolfgang – 1/2-1/2 – Portisch, Lajos – G33

    • Image indicative
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  • Image indicative
    • B20 - B99 - 1. e4 c5 - Sicilian Defense, B30 - B39 1.e4 c5 2. Nf3 Nc6 Sicilian defence, B38a - Maroczy Bind, 6.Be3, B38q - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Nxd4 - Maroczy Bind, SÉRIE B 1.e4 2....
    • Siegen olm 1970 – Round 18 – Larsen, Benjamin Holsko – 1/2-1/2 – Browne, Walter S – G32

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  • Image indicative
    • 9.O-O O-O, D30-D39 1. d4 d5 2. c4 e6 Queen's gambit declined, D33 - 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 cxd4 8. Nxd4 Bc5 - Tarrasch Defense: Dubov Tarrasch, D33a - 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 - Tarrasch Defense: Rubinstein System, D33q - 10.Be3, SÉRIE D
    • Siegen olm 1970 – Round 18 – Spassky, Boris V. – 1-0 – Yanofsky, Daniel Abraham – G31

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  • Image indicative
    • B10 - B19 1. e4 c6 Caro-Kann defence, B10d - 2.d3 d5 3.Nd2 g6 - Breyer, SÉRIE B 1.e4 2....
    • Siegen olm 1970 – Round 17 – Fischer, Raphael – 1/2-1/2 – Hort, Vlastimil – G30

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  • Image indicative
    • 7...cxd4 8.exd4 Be7 — Main Line, D40-D42 – 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 – Queen’s Gambit Declined: Semi-Tarrasch Defense, D42a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 - Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line, D42j - 9.O-O O-O 10.Re1 (not 10...Bf6, 10...Ncb4, 10...Nf6), SÉRIE D
    • Siegen olm 1970 – Round 17 – Popov, Luben – 1-0 – Podzielny, Karl-Heinz – G29

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  • Image indicative
    • 4...dxc6 5.O-O Bg4 — Exchange, C60 - C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish opening), C68c - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 - Ruy Lopez: Exchange Variation, C68o - 6.h3 h5, SÉRIE C
    • Siegen olm 1970 – Round 16 – Larsen, Benjamin Holsko – 0-1 – Myagmarsuren, Lkhamsuren – G28

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  • Image indicative
    • 5...f6 6.d4 Bg4 — Exchange, C60 - C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish opening), C68j - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O - Ruy Lopez: Exchange Variation, Normal Variation, C69d - 7.c3 Bd6, SÉRIE C
    • Siegen olm 1970 – Round 16 – Hort, Vlastimil – 1/2-1/2 – Portisch, Lajos – G27

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  • Image indicative
    • 7...Nbd7 8.d5 Nc5, 9.Qc2 a5, E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E94 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O - King's Indian Defense: Orthodox Variation, SÉRIE E
    • Siegen olm 1970 – Round 16 – Gligoric, Sofija – 0-1 – Fischer, Raphael – G26

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  • Image indicative
    • B06g - 2.d4 Bg7 3.c3, B06g - 2.d4 Bg7 3.c3 d6 4.f4 c5 - Pterodactyl, SÉRIE B 1.e4 2....
    • Siegen olm 1970 – Round 15 – Ardiansyah, Haji – 0-1 – Larsen, Benjamin Holsko – G25

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  • Image indicative
    • 5...f6 6.d4 exd4 — Exchange, C60 - C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish opening), C68j - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O - Ruy Lopez: Exchange Variation, Normal Variation, C69i - 7.Nxd4 Ne7, SÉRIE C
    • Siegen olm 1970 – Round 15 – Fischer, Raphael – 1-0 – Unzicker, Wolfgang – G24

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  • Image indicative
    • A04 - 1.Nf3 - Reti, A04 - A09 1. Nf3 Opening Reti, SÉRIE A
    • Siegen olm 1970 – Round 14 – Larsen, Benjamin Holsko – 1-0 – Acevedo Rodriguez, Maria Nella – G23

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  • Image indicative
    • B20 - B99 - 1. e4 c5 - Sicilian Defense, B80-B85 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 Sicilian, Scheveningen variation, B84 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Nbd7 - Sicilian Defense: Najdorf Variation, Scheveningen Variation, SÉRIE B 1.e4 2....
    • Siegen olm 1970 – Round 14 – Unzicker, Wolfgang – 1/2-1/2 – Portisch, Lajos – G22

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ECO CODE

  • Non_classe (3)
  • SÉRIE A (13316)
    • A00 1. xxxx (154)
      • A00 - - Start position (2360)
        • A00a - Start position (322)
          • 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. dxe5 - Petrov's Defense: Modern Attack (0)
          • 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 (18)
          • 1.e4 e5 2.Nc3 Nf6 3.g3 d5 4.exd5 Nxd5 - Glek System (2)
          • 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 - Center Attack (0)
          • C40 - 1. e4 e5 2. Nf3 Bc5 - King's Pawn Game: Busch-Gass Gambit (4)
            • 3.Bc4 fxe4 — Main Line (0)
              • C40p - (not 4.Nxe5) (0)
              • C40p - 4.Nxe5 d5 (not 5.Qh5+) (0)
              • C40p - 4.Nxe5 d5 5.Qh5+ g6 6.Nxg6 hxg6 (0)
              • C40p - 4.Nxe5 d5 5.Qh5+ g6 6.Nxg6 Nf6 (0)
              • C40p - 4.Nxe5 Nf6 (0)
              • C40q - 4.Nxe5 Qg5 (not 5.d4) (0)
              • C40q - 4.Nxe5 Qg5 5.d4 Qxg2 6.Qh5+ g6 7.Bf7+ Kd8 — Main Line (0)
            • 3.Nxe5 Qf6 (1)
              • C40t - 3...Qf6 (not 4.Nc4, 4.d4) (0)
              • C40t - 4.Nc4 (0)
              • C40u - 4.d4 (not 4...d6) (0)
              • C40u - 4.d4 d6 (not 5.Nc4) (0)
              • C40u - 4.d4 d6 5.Nc4 (not 5...fxe4) (0)
              • C40u - 4.d4 d6 5.Nc4 fxe4 (not 6.Be2, 6.Ne3) (1)
              • C40v - 4.d4 d6 5.Nc4 fxe4 6.Be2 (0)
              • C40w - 4.d4 d6 5.Nc4 fxe4 6.Ne3 (0)
            • C40a - 2...f6 (not 3.Nc3, 3.Nxe5, 3.exd5, 3.d3, 3.d4, 3.exf5, 3.Bc4) (0)
            • C40b - 2...Qf6 (not 3.Nc3, 3.Nxe5, 3.exd5, 3.d3, 3.d4, 3.exf5, 3.Bc4) (0)
            • C40c - 2...Qe7 (not 3.Nc3) (0)
            • C40d - 3.Nc3 (1)
            • C40e - 2...d5 (not 3.Nxe5, 3.exd5) (0)
            • C40f - 3.Nxe5 (not 3...dxe4) (0)
            • C40f - 3.Nxe5 dxe4 4.Bc4 (0)
            • C40g - 2...d5 3.exd5 (not 3...Bd6, 3...e4) (0)
            • C40h - 3.exd5 Bd6 (0)
            • C40i - 3.exd5 e4 (2)
            • C40j - 2...f5 (not 3.Bc4, 3.Nxe5, 3.d3, 3.d4, 3.exf5) (0)
            • C40k - 3.d3 (0)
            • C40m - 3.d4 (not 3...fxe4) (0)
            • C40m - 3.d4 fxe4 4.Nxe5 Nf6 (0)
            • C40n - 2...f5 3.exf5 (not 3...e4) (0)
            • C40n - 3.exf5 e4 (0)
            • C40o - 2...f5 3.Bc4 (not 3...Nf6, 3...b5) (0)
            • C40o - 3.Bc4 b5 (0)
            • C40o - 3.Bc4 Nf6 (0)
            • C40r - 2...f5 3.Nxe5 (not 3...Nc6) (0)
            • C40s - 3.Nxe5 Nc6 (0)
          • C47 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. ....Four knights, Scotch variation (317)
            • C47a - 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 - Four Knights Game (317)
              • 4.d4 Bb4 (8)
                • C47j - 4...Bb4 (not 5.Nxe5, 5.d5) (0)
                • C47j - 5.d5 (2)
                • C47k - 5.Nxe5 (6)
              • 4.d4 exd4 — Main Line (166)
                • C47l - 5.Nd5 (not 5...Be7, 5...Nb4, 5...Nxd5, 5...Nxe4) (0)
                • C47l - 5.Nd5 Nb4 (0)
                • C47l - 5.Nd5 Nxd5 (0)
                • C47m - 5.Nd5 Nxe4 (not 6.Bc4, 6.Qe2) (0)
                • C47m - 5.Nd5 Nxe4 6.Bc4 (0)
                • C47m - 5.Nd5 Nxe4 6.Qe2 (0)
                • C47n - 5.Nd5 Be7 (1)
                • C47o - 5.Nxd4 (not 5...Bb4, 5...Bc5, 5...d6) (2)
                • C47p - 5.Nxd4 d6 (3)
                • C47q - 5.Nxd4 Bc5 (5)
                • C47r - 5.Nxd4 Bb4 (0)
                • C47s - 5.Nxd4 Bb4 6.Nxc6 bxc6 (not 7.Bd3) (0)
                • C47s - 5.Nxd4 Bb4 6.Nxc6 bxc6 7.Bd3 — Main Line (29)
                • C47t - 5.Nxd4 Bb4 6.Nxc6 bxc6 7.Bd3 d5 8.exd5 cxd5 — Main Line (35)
                • C47u - 5.Nxd4 Bb4 6.Nxc6 bxc6 7.Bd3 d5 8.exd5 cxd5 9.O-O O-O — Main Line (58)
                • C47v - 5.Nxd4 Bb4 6.Nxc6 bxc6 7.Bd3 d5 8.exd5 cxd5 9.O-O O-O 10.Bg5 c6 (not 11.Na4) (27)
                • C47w - 5.Nxd4 Bb4 6.Nxc6 bxc6 7.Bd3 d5 8.exd5 cxd5 9.O-O O-O 10.Bg5 c6 11.Na4 — Main Line (5)
                • C47y - 5.Nxd4 Bb4 6.Nxc6 bxc6 7.Bd3 d5 8.exd5 cxd5 9.O-O O-O 10.Bg5 c6 11.Qf3 Be7 — Main Line (1)
              • 4.g3 Bc5 — Main Line (18)
                • C47g - 4...Bc5 (not 5.Bg2) (0)
                • C47g - 5.Bg2 (10)
                • C47h - 5.Bg2 d6 6.d3 a6 — Main Line (8)
              • 4.Nd5 (1)
            • C47a - 4.Nxe5 (25)
            • C47b - 4.a3 - Gunsberg Variation (23)
            • C47c - 4.Be2 (10)
            • C47d - 4.Nc3 - Italian Variation (3)
            • C47e - 4.g3 (not 4...d5) (5)
            • C47f - 4.g3 d5 (12)
            • C47i - 4.d4 (not 4...d6) (0)
            • C47i - 4.d4 d6 (0)
            • C47l - 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 - Four Knights Game: Scotch Variation Accepted (20)
              • 5.Nxd4 Bc5 6.Be3 - Scotch Variation Accepted (3)
              • C47 - 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 - Four Knights Game: Scotch Variation Accepted (17)
                • 6...bxc6 7.Bd3 d6 - Scotch Variation Accepted (1)
                • 6...bxc6 7.Bd3 O-O - Scotch Variation Accepted (6)
                • C47t - 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 d5 - Four Knights Game: Scotch Variation Accepted (10)
                  • 8.exd5 O-O 9.O-O (9)
        • A00f - Anderssen Opening (0)
          • A00b - 1…e5 2.Kf2 - Fried fox (0)
          • A00c - Kadas Opening (0)
          • A00d - Clemenz Opening (0)
          • A00e - Ware Opening (0)
          • A00f - 1…e5 2.h3 d5 - Creepy Crawly Opening (Basman) (0)
          • A00g - Amar/Paris Opening (0)
          • A00h - Durkin (0)
          • A00i - Saragossa (0)
          • A00j - 1…g6 2.g4 - Spike Deferred (0)
          • A00l - 1…c5 2.Nf3 Nc6 - Van Geet: Sicilian Variation (0)
          • A00m - 1…d5 2.Nf3 Nf6 - Van Geet: (0)
          • A00n - 1…f5 - Grob: Alessi Gambit (0)
          • A00o - 1…d5 2.Bg2 Bxg4 3.c4 - Grob Gambit Accepted: Fritz Gambit (0)
          • A00p - 1…Nf6 2.Bb2 e6 - Polish: (0)
          • A00q - 1…d5 2.Bb2 Bf5 - Polish: (0)
          • A00r - 1…e5 2.Bb2 c5 - Polish: Wolfertz Gambit (0)
          • A00s - 1…e5 2.Bb2 Bxb4 - Polish: (0)
          • A00t - 1…Nf6 - Benko Opening (0)
          • A00u - 1…e5 - Benko Opening (0)
          • A00v - 1…d5 2.Bg2 c6 - Benko Opening (0)
        • A00g - 1…d5 2.g3 e5 3.f4 - Amar: Paris Gambit (1)
        • A00k - Van Kruijs (0)
        • A00m - 1…d5 2.e4 dxe4 3.Bc4 - Van Geet: Hector Gambit (26)
        • A00n - Grob (1)
        • A00o - 1…d5 2.Bg2 c6 3.g5 - Grob Gambit: Spike Attack (0)
        • A00o - 1…d5 2.Bg2 e5 3.c4 - Grob Gambit: Hurst Attack (2)
        • A00p - 1…c6 2.Bb2 a5 3.b5 - Polish: Schuehler Gambit (5)
        • A00q - 1…d5 2.Bb2 Nf6 3.e3 - Polish: (1)
        • A00r - 1…e5 2.Bb2 f6 3.e4 Bxb4 - Polish: Tartakower Gambit (0)
        • A00s - 1…e5 2.Bb2 Bxb4 3.Bxe5 - Polish: (0)
        • A00s - 1…e5 2.Bb2 Bxb4 3.Bxe5 Nf6 - Polish: (0)
        • A00s - 1…e5 2.Bb2 Bxb4 3.Bxe5 Nf6 4.c4 - Polish: (0)
        • A00s - 1…e5 2.Bb2 Bxb4 3.Bxe5 Nf6 4.Nf3 - Polish: (6)
        • A00v - 1…d5 2.Bg2 Nf6 - Benko Opening (1)
    • A01 - 1.b3 - Nimzowitsch-Larsen Attack (15)
    • A02 - A03 1. f4 Bird's opening (51)
      • A02 - 1.f4 - Bird (12)
      • A03 - 1.f4 d5 - Bird (1)
      • A61 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 - Benoni (1)
      • A66 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 - Benoni (2)
    • A04 - A09 1. Nf3 Opening Reti (2004)
      • A04 - 1.Nf3 - Reti (10)
      • A05 - 1.Nf3 Nf6 - Reti (294)
      • A06 - 1.Nf3 d5 - Reti (27)
      • A07 - 1.Nf3 d5 2.g3 - Reti (53)
      • A08 - 1.Nf3 d5 2.g3 c5 - Reti (188)
      • A09 - 1.Nf3 d5 2.c4 - Reti (304)
        • A09a - 2.c4 (153)
        • A09b - 2…d4 - Advance Variation (1)
        • A09c - 2…d4 3.b4 - Advance Anglo-Polish Attack (3)
        • A09c - 2…d4 3.b4 g6 - Advance Anglo-Polish (66)
        • A09d - 2…d4 3.e3 - Advance (0)
        • A09e - 2…d4 3.e3 c5 - Advance (2)
        • A09f - 2…d4 3.e3 Nc6 - Advance (0)
        • A09f - 2…d4 3.e3 Nc6 4.exd4 Nxd4 - Advance (11)
        • A09g - 2…d4 3.g3 - Advance (0)
        • A09h - 2…d4 3.g3 Nc6 - Advance (0)
        • A09h - 2…d4 3.g3 Nc6 4.Bg2 e5 - Advance (11)
        • A09i - 2…d4 3.g3 g6 - Advance (0)
        • A09i - 2…d4 3.g3 g6 4.Bg2 Bg7 - Advance (8)
        • A09j - 2…d4 3.g3 c5 - Advance (0)
        • A09j - 2…d4 3.g3 c5 4.Bg2 Nc6 - Advance (0)
        • A09j - 2…d4 3.g3 c5 4.Bg2 Nc6 5.d3 e5 - Advance (11)
        • A09k - 2…dxc4 - Accepted (1)
        • A09l - 2…dxc4 3.g3 - Accepted (0)
        • A09m - 2…dxc4 3.g3 e6 - Accepted (21)
        • A09n - 2…dxc4 3.Qa4+ - Accepted (1)
        • A09o - 2…dxc4 3.Na3 - Accepted (1)
        • A09p - 2…dxc4 3.Na3 a6 - Accepted (1)
        • A09q - 2…dxc4 3.Na3 c5 - Accepted (0)
        • A09r - 2…dxc4 3.e3 - Accepted (1)
        • A09s - 2…dxc4 3.e3 Be6 - Accepted Keres Variation (1)
        • A09t - 2…dxc4 3.e3 Nf6 - Accepted (1)
        • A09u - 2…dxc4 3.e3 Nf6 4.Bxc4 e6 - Accepted (7)
    • A10-A19 - 1.c4 - English Opening (723)
      • A12 - 1.c4 c6 2.Nf3 d5 3.b3 - English (29)
      • A13 - 1.c4 e6 - English (943)
        • A13a - 1…e6 (0)
        • A13b - 2.g3 (6)
        • A13c - 2.g3 d5 (0)
        • A13d - 2.g3 d5 3.Bg2 (0)
        • A13e - 2.Nc3 (4)
        • A13f - 2.Nc3 Bb4 (0)
        • A13g - 2.Nc3 d5 (0)
        • A13h - 2.Nf3 (0)
        • A13i - 2.Nf3 Nf6 (0)
        • A13j - 2.Nf3 Nf6 3.g3 (0)
        • A13k - 2.Nf3 Nf6 3.g3 a6 4.Bg2 b5 - Romanishin Gambit (0)
        • A13l - 2.Nf3 d5 (2)
        • A13m - 2.Nf3 d5 3.b3 - Agincourt Variation (0)
        • A13n - 2.Nf3 d5 3.b3 Nf6 4.Bb2 c5 5.e3 Nc6 - Wimpey System (0)
        • A13o - 2.Nf3 d5 3.g3 - Agincourt Variation (1)
        • A13p - 2.Nf3 d5 3.g3 c6 - Kurajica Defence (0)
        • A13q - 2.Nf3 d5 3.g3 c6 4.Qc2 - Kurajica Defence (0)
        • A13s - 2.Nf3 d5 3.g3 Nf6 4.Bg2 - Neo-Catalan (8)
        • A13s - 2.Nf3 d5 3.g3 Nf6 4.Bg2 c6 5.b3 - Neo-Catalan (0)
        • A13t - 2.Nf3 d5 3.g3 Nf6 4.Bg2 c5 5.O-O - Neo-Catalan (0)
        • A13u - 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4 - Neo-Catalan Accepted (274)
        • A13v - 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4 5.Qa4+ Nbd7 6.O-O - Neo-Catalan Accepted (0)
        • A13w - 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4 a6 - Neo-Catalan Accepted (0)
      • A14 - 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 - English (26)
      • A16 - 1.c4 Nf6 2.Nc3 - English (2)
    • A10-A39 English Opening (5296)
      • 3...e5 - Symmetrical Variation (1)
      • 4...d5 - Symmetrical Variation (1)
      • 4...d6 - Symmetrical Variation (1)
      • 4...g6 - Full Symmetry Line (1)
      • 4...Nf6 - Symmetrical Variation (1)
      • A10 - 1.c4 - English (122)
      • A11 - 1.c4 c6 - English (7)
      • A15 - 1.c4 Nf6 - English (12)
      • A17 - 1.c4 Nf6 2.Nc3 e6 - English (190)
      • A18 - 1.c4 Nf6 2.Nc3 e6 3.e4 - English (76)
      • A19 - 1.c4 Nf6 2.Nc3 e6 3.e4 c5 - English (28)
      • A20 - 1.c4 e5 - English (310)
      • A21 - 1.c4 e5 2.Nc3 - English (15)
      • A22 - 1.c4 e5 2.Nc3 Nf6 - English (6)
      • A23 - 1.c4 e5 2.Nc3 Nf6 3.g3 c6 - English (1)
      • A24 - 1.c4 e5 2.Nc3 Nf6 3.g3 g6 - English (25)
      • A25 - 1.c4 e5 2.Nc3 Nc6 - English (2)
      • A26 - 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 - English (84)
      • A27 - 1.c4 e5 2.Nc3 Nc6 3.Nf3 - English (32)
      • A28 - 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 - English (298)
      • A29 - 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 - English (19)
      • A30 - 1.c4 c5 - English (1119)
        • A30a - 2.b3 - Symmetrical (1)
        • A30a - 2.g3 - Symmetrical (0)
        • A30a - 2.g3 g6 - Symmetrical (21)
        • A30a - Symmetrical (569)
        • A30b - 2.Nf3 - Symmetrical (0)
        • A30b - 2.Nf3 b6 - Symmetrical (0)
        • A30b - 2.Nf3 b6 3.g3 - Symmetrical (0)
        • A30b - 2.Nf3 b6 3.g3 Bb7 4.Bg2 - Symmetrical (42)
        • A30b - 2.Nf3 g6 - Symmetrical (4)
        • A30b - 2.Nf3 Nc6 - Symmetrical (16)
        • A30c - 2.Nf3 Nf6 - Symmetrical (12)
        • A30d - 2.Nf3 Nf6 3.g3 - Symmetrical (83)
        • A30e - 2.Nf3 Nf6 3.g3 b6 - Symmetrical System (0)
        • A30e - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 - Symmetrical System (0)
        • A30e - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.Nc3 - Symmetrical System (1)
        • A30e - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O - Symmetrical System (0)
        • A30f - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6 - Symmetrical Double Fianchetto (0)
        • A30f - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6 6.Nc3 Bg7 - Symmetrical Double Fianchetto (73)
        • A30g - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6 6.b3 - Symmetrical Mutual Double Fianchetto (0)
        • A30g - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6 6.b3 Bg7 7.Bb2 O-O - Symmetrical Mutual Double Fianchetto (0)
        • A30g - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6 6.b3 Bg7 7.Bb2 O-O 8.Nc3 - Symmetrical Mutual Double Fianchetto (0)
        • A30g - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6 6.b3 Bg7 7.Bb2 O-O 8.Nc3 d5 - Symmetrical Mutual Double Fianchetto with …d5 (60)
        • A30h - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 - Symmetrical Hedgehog System (0)
        • A30h - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 - Symmetrical Hedgehog System (9)
        • A30i - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 a6 - Symmetrical Hedgehog (25)
        • A30j - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 d6 - Symmetrical Hedgehog (4)
        • A30k - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 d6 7.b3 - Symmetrical Hedgehog (1)
        • A30l - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 d6 7.d4 - Symmetrical Hedgehog (1)
        • A30m - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 - Symmetrical Hedgehog System (5)
        • A30n - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.Re1 - Symmetrical Hedgehog (34)
        • A30o - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.Re1 d5 - Symmetrical Hedgehog (23)
        • A30p - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.b3 - Symmetrical Hedgehog (0)
        • A30p - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.b3 O-O - Symmetrical Hedgehog (0)
        • A30p - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.b3 O-O 8.Bb2 d6 - Symmetrical Hedgehog (28)
        • A30q - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 - Symmetrical Hedgehog (3)
        • A30r - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 - Symmetrical Hedgehog (9)
        • A30s - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 O-O - Symmetrical Hedgehog (1)
        • A30s - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 O-O 9.Rd1 Nc6 - Symmetrical Hedgehog (25)
        • A30t - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 Nc6 - Symmetrical Hedgehog (5)
        • A30u - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 - Symmetrical Hedgehog (24)
        • A30v - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 9.b3 - Symmetrical Hedgehog (0)
        • A30v - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 9.b3 Nbd7 - Symmetrical Hedgehog (0)
        • A30v - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 9.b3 Nbd7 10.Nb5 - Symmetrical Hedgehog (17)
        • A30w - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 9.Rd1 - Symmetrical Hedgehog (10)
        • A30x - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 9.Rd1 a6 10.b3 Nbd7 - Symmetrical Hedgehog Flexible Formation (7)
        • A30y - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 9.Rd1 a6 10.b3 Nbd7 11.e4 - Symmetrical Hedgehog Flexible Formation (0)
        • A30y - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 9.Rd1 a6 10.b3 Nbd7 11.e4 O-O - Symmetrical Hedgehog Flexible Formation (0)
        • A30y - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 9.Rd1 a6 10.b3 Nbd7 11.e4 Qc7 - Symmetrical Hedgehog Flexible Formation (18)
      • A31 - 1.c4 c5 2.Nf3 Nf6 3.d4 - English (83)
      • A32 - 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 - English (118)
      • A33 - 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 - English (265)
        • A33a - Symmetrical, Two Knights, 5.Nc3 Nc6 (84)
        • A33b - 6.Bf4 - Symmetrical Two Knights (0)
        • A33c - 6.Bg5 - Symmetrical Two Knights (0)
        • A33d - 6.e3 - Symmetrical Two Knights (0)
        • A33e - 6.a3 - Symmetrical Two Knights (0)
        • A33f - 6.a3 Bc5 - Symmetrical Two Knights (26)
        • A33g - 6.Ndb5 - Symmetrical Two Knights (0)
        • A33h - 6.Ndb5 Bb4 - Symmetrical Two Knights (4)
        • A33i - 6.Ndb5 d5 - Symmetrical Two Knights (3)
        • A33j - 6.Ndb5 d5 7.Bf4 e5 8.cxd5 exf4 9.dxc6 bxc6 10.Qxd8+ Kxd8 - Symmetrical Two Knights Queenswap (9)
        • A33k - 6.g3 - Symmetrical Two Knights (0)
        • A33l - 6.g3 a6 - Symmetrical Two Knights (0)
        • A33m - 6.g3 Bb4 - Symmetrical Two Knights (0)
        • A33n - 6.g3 Bc5 - Symmetrical Two Knights (0)
        • A33o - 6.g3 Qb6 - Symmetrical Geller Variation (158)
        • A33p - 6.g3 Qb6 7.Nb3 - Symmetrical Geller (9)
        • A33q - 6.g3 Qb6 7.Nb3 Ne5 - Symmetrical Geller (23)
      • A34 - 1.c4 c5 2.Nc3 - English (4)
      • A35 - 1.c4 c5 2.Nc3 Nc6 - English (614)
        • A35a - Symmetrical (206)
        • A35b - 3.e3 - Symmetrical (0)
        • A35c - 3.Nf3 - Symmetrical (0)
        • A35d - 3.Nf3 g6 - Symmetrical (2)
        • A35e - 3.Nf3 g6 4.e3 - Symmetrical (42)
        • A35f - 3.Nf3 g6 4.e3 Bg7 - Symmetrical (14)
        • A35g - 3.Nf3 Nf6 - Symmetrical Four Knights (407)
        • A35g - 3.Nf3 Nf6 4.d4 - Symmetrical Four Knights (1)
        • A35h - 3.Nf3 Nf6 4.e3 - Symmetrical Four Knights (10)
        • A35i - 3.Nf3 Nf6 4.e3 e5 - Symmetrical Four Knights (51)
        • A35j - 3.Nf3 Nf6 4.g3 - Symmetrical Four Knights (15)
        • A35k - 3.Nf3 Nf6 4.g3 d5 - Symmetrical Four Knights (18)
        • A35l - 3.Nf3 Nf6 4.g3 d5 5.cxd5 - Symmetrical Four Knights (48)
      • A36 - 1.c4 c5 2.Nc3 Nc6 3.g3 - English (461)
        • A36a - Symmetrical, 3.g3 (155)
        • A36b - 3…Nf6 - Symmetrical (0)
        • A36c - 3…e6 4.Nf3 Nf6 - Symmetrical Keres-Parma System (0)
        • A36d - 3…e6 4.Nf3 Nf6 5.Bg2 Be7 6.O-O d5 7.cxd5 Nxd5 - Symmetrical Keres-Parma Main Line Exchange (0)
        • A36e - 3…g6 4.Bg2 - Symmetrical (0)
        • A36e - 3…g6 4.Bg2 Bg7 - Symmetrical (1)
        • A36f - 3…g6 4.Bg2 Bg7 5.d3 - Symmetrical (43)
        • A36g - 3…g6 4.Bg2 Bg7 5.a3 - Symmetrical (16)
        • A36h - 3…g6 4.Bg2 Bg7 5.a3 e6 - Symmetrical (5)
        • A36i - 3…g6 4.Bg2 Bg7 5.a3 d6 - Symmetrical (10)
        • A36j - 3…g6 4.Bg2 Bg7 5.b3 - Symmetrical (10)
        • A36k - 3…g6 4.Bg2 Bg7 5.e3 - Symmetrical (7)
        • A36l - 3…g6 4.Bg2 Bg7 5.e3 e5 - Symmetrical (Botvinnik Reversed) (7)
        • A36m - 3…g6 4.Bg2 Bg7 5.e3 e6 - Symmetrical (2)
        • A36m - 3…g6 4.Bg2 Bg7 5.e3 e6 6.Nge2 - Symmetrical (13)
        • A36m - 3…g6 4.Bg2 Bg7 5.e3 e6 6.Nge2 Nge7 - Symmetrical (0)
        • A36n - 3…g6 4.Bg2 Bg7 5.e4 - Symmetrical Botvinnik System (316)
        • A36o - 3…g6 4.Bg2 Bg7 5.e4 Nf6 - Symmetrical Botvinnik (0)
        • A36o - 3…g6 4.Bg2 Bg7 5.e4 Nf6 6.Nge2 - Symmetrical Botvinnik (0)
        • A36p - 3…g6 4.Bg2 Bg7 5.e4 e6 - Symmetrical Botvinnik (0)
        • A36p - 3…g6 4.Bg2 Bg7 5.e4 e6 6.Nge2 Nge7 - Symmetrical Botvinnik (3)
        • A36q - 3…g6 4.Bg2 Bg7 5.e4 e6 6.Nge2 Nge7 7.O-O O-O 8.d3 - Symmetrical Botvinnik (0)
        • A36r - 3…g6 4.Bg2 Bg7 5.e4 e6 6.Nge2 Nge7 7.O-O O-O 8.d3 d6 - Symmetrical Botvinnik (7)
        • A36s - 3…g6 4.Bg2 Bg7 5.e4 d6 - Symmetrical Botvinnik (0)
        • A36t - 3…g6 4.Bg2 Bg7 5.e4 d6 6.Nge2 - Symmetrical Botvinnik (3)
        • A36u - 3…g6 4.Bg2 Bg7 5.e4 d6 6.Nge2 Nf6 - Symmetrical Botvinnik (1)
        • A36v - 3…g6 4.Bg2 Bg7 5.e4 d6 6.Nge2 Nf6 7.O-O O-O - Symmetrical Botvinnik System (1)
        • A36w - 3…g6 4.Bg2 Bg7 5.e4 d6 6.Nge2 Nf6 7.O-O O-O 8.d3 - Symmetrical Botvinnik System (6)
        • A36x - 3…g6 4.Bg2 Bg7 5.e4 d6 6.Nge2 Nf6 7.O-O O-O 8.d3 Rb8 - Symmetrical Botvinnik System (0)
        • A36y - 3…g6 4.Bg2 Bg7 5.e4 d6 6.Nge2 Nf6 7.O-O O-O 8.d3 Ne8 - Symmetrical Botvinnik System (3)
        • A36z - 3…g6 4.Bg2 Bg7 5.e4 d6 6.Nge2 Nf6 7.O-O O-O 8.d3 a6 - Symmetrical Botvinnik System (10)
      • A37 - 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 - English (587)
        • A37a - Symmetrical, 5.Nf3 (201)
        • A37b - 5…a6 - Symmetrical (1)
        • A37c - 5…Nh6 - Symmetrical (2)
        • A37d - 5…Nh6 6.O-O - Symmetrical (5)
        • A37e - 5…d6 - Symmetrical (11)
        • A37f - 5…d6 6.d3 - Symmetrical (8)
        • A37g - 5…d6 6.O-O - Symmetrical (53)
        • A37h - 5…d6 6.O-O Nh6 - Symmetrical (6)
        • A37i - 5…e6 - Symmetrical (22)
        • A37j - 5…e6 6.d3 - Symmetrical (0)
        • A37k - 5…e6 6.e3 - Symmetrical (1)
        • A37l - 5…e6 6.O-O - Symmetrical (0)
        • A37l - 5…e6 6.O-O Nge7 - Symmetrical (8)
        • A37m - 5…e6 6.O-O Nge7 7.e3 - Symmetrical (7)
        • A37n - 5…e6 6.O-O Nge7 7.d3 - Symmetrical (2)
        • A37o - 5…e6 6.O-O Nge7 7.d3 O-O - Symmetrical (6)
        • A37p - 5…e6 6.O-O Nge7 7.d3 O-O 8.Bd2 - Symmetrical (2)
        • A37q - 5…e5 - Symmetrical (396)
        • A37r - 5…e5 6.a3 - Symmetrical (15)
        • A37s - 5…e5 6.d3 - Symmetrical (1)
        • A37t - 5…e5 6.d3 Nge7 - Symmetrical (5)
        • A37u - 5…e5 6.O-O - Symmetrical (14)
        • A37u - 5…e5 6.O-O d6 - Symmetrical (13)
        • A37v - 5…e5 6.O-O d6 7.d3 - Symmetrical (0)
        • A37v - 5…e5 6.O-O d6 7.d3 Nge7 - Symmetrical (2)
        • A37w - 5…e5 6.O-O d6 7.d3 Nge7 8.a3 - Symmetrical (8)
        • A37x - 5…e5 6.O-O Nge7 - Symmetrical (0)
        • A37y - 5…e5 6.O-O Nge7 7.d3 - Symmetrical (0)
        • A37y - 5…e5 6.O-O Nge7 7.d3 O-O - Symmetrical (0)
        • A37y - 5…e5 6.O-O Nge7 7.d3 O-O 8.a3 - Symmetrical (3)
      • A38 - 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 - English (41)
        • A38b - 6.d4 - Symmetrical Main Line (2)
        • A38c - 6.O-O - Symmetrical Main Line (13)
        • A38d - 6.O-O d5 - Symmetrical Main Line (0)
        • A38e - 6.O-O d6 - Symmetrical Main Line (0)
        • A38f - 6.O-O O-O - Symmetrical Main Line (0)
        • A38g - 6.O-O O-O 7.Rb1 - Symmetrical Main Line (0)
        • A38h - 6.O-O O-O 7.b3 - Symmetrical Main Line (4)
        • A38i - 6.O-O O-O 7.a3 - Symmetrical Main Line (0)
        • A38j - 6.O-O O-O 7.a3 d6 - Symmetrical Main Line (2)
        • A38l - 6.O-O O-O 7.d3 a6 - Symmetrical Main Line (1)
        • A38m - 6.O-O O-O 7.d3 d5 - Symmetrical Main Line (3)
        • A38n - 6.O-O O-O 7.d3 d6 - Symmetrical Main Line (0)
        • A38o - 6.O-O O-O 7.d3 d6 8.Rb1 - Symmetrical Main Line (1)
        • A38p - 6.O-O O-O 7.d3 d6 8.Bd2 - Symmetrical Main Line (0)
        • A38q - 6.O-O O-O 7.d3 d6 8.a3 - Symmetrical Main Line (3)
        • A38r - 6.O-O O-O 7.d3 d6 8.a3 a6 - Symmetrical Main Line (1)
      • A39 - 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4 - English (73)
        • A39b - 7…cxd4 - Symmetrical Main Line (0)
        • A39c - 7…cxd4 8.Nxd4 - Symmetrical Main Line (2)
        • A39d - 7…cxd4 8.Nxd4 Qa5 - Symmetrical Main Line (29)
        • A39e - 7…cxd4 8.Nxd4 Qb6 - Symmetrical Main Line (0)
        • A39e - 7…cxd4 8.Nxd4 Qb6 9.Nc2 - Symmetrical Main Line (0)
        • A39f - 7…cxd4 8.Nxd4 a6 - Symmetrical Main Line (0)
        • A39g - 7…cxd4 8.Nxd4 d6 - Symmetrical Main Line (9)
        • A39h - 7…cxd4 8.Nxd4 Ng4 - Symmetrical Main Line (2)
        • A39i - 7…cxd4 8.Nxd4 Ng4 9.e3 d6 - Symmetrical Main Line (6)
        • A39j - 7…cxd4 8.Nxd4 Nxd4 - Symmetrical Main Line (0)
        • A39j - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 - Symmetrical Main Line (0)
        • A39k - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 - Symmetrical Main Line (6)
        • A39l - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 10.Qd2 - Symmetrical Main Line (0)
        • A39m - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 10.Qd3 - Symmetrical Main Line (3)
        • A39n - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 10.Qd3 Bf5 - Symmetrical Main Line (5)
        • A39o - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 10.Qd3 Rb8 - Symmetrical Main Line (0)
        • A39p - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 10.Qd3 a6 - Symmetrical Main Line (7)
        • A39q - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 10.Qd3 a6 11.Bd2 - Symmetrical Main Line (0)
        • A39q - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 10.Qd3 a6 11.Bd2 Rb8 - Symmetrical Main Line (1)
        • A39r - 7…cxd4 8.Nxd4 Nxd4 9.Qxd4 d6 10.Qd3 a6 11.Bd2 Rb8 12.Rac1 - Symmetrical Main Line (3)
    • A40 - A49 1. d4 (2013)
      • A40 - 1.d4 - Queen’s Pawn Game (1761)
        • A40a - Queen’s Pawn Game (234)
        • A40b - 1…c6 (0)
        • A40b - 1…c6 2.c4 (0)
        • A40b - 1…c6 2.c4 b5 - Jadoul (0)
        • A40b - 1…c6 2.Nf3 (0)
        • A40c - 1…b5 - Polish Defence (0)
        • A40c - 1…b5 2.e4 - Polish Defence (0)
        • A40c - 1…b5 2.e4 Bb7 - Polish Defence (0)
        • A40c - 1…b5 2.e4 Bb7 3.Bxb5 - Polish Defence Spassky Gambit (3)
        • A40d - 1…b6 - English Defence (0)
        • A40d - 1…b6 2.c4 - English Defence (0)
        • A40d - 1…b6 2.c4 Bb7 - English Defence (9)
        • A40e - 1…b6 2.c4 e6 - English Defence (20)
        • A40f - 1…b6 2.c4 e6 3.a3 - English Defence (25)
        • A40g - 1…b6 2.c4 Bb7 3.Nc3 e6 4.e4 f5 - English Defence Hartlaub Gambit (35)
        • A40g - 1…b6 2.c4 e6 3.e4 - English Defence (0)
        • A40g - 1…b6 2.c4 e6 3.e4 Bb7 4.f3 f5 - English Defence Polli Gambit (0)
        • A40h - 1…b6 2.c4 e6 3.Nc3 - English Defence (17)
        • A40i - 1…e5 - Englund Gambit (0)
        • A40i - 1…e5 2.dxe5 - Englund Gambit Accepted (0)
        • A40i - 1…e5 2.dxe5 d6 - Englund Gambit: Hartlaub (0)
        • A40i - 1…e5 2.dxe5 f6 - Englund Gambit: Soller (0)
        • A40i - 1…e5 2.dxe5 Nc6 - Englund Gambit: (0)
        • A40i - 1…e5 2.dxe5 Nc6 3.Nf3 - Englund Gambit: (0)
        • A40i - 1…e5 2.dxe5 Nc6 3.Nf3 f6 - Englund Gambit: Soller Deferred (0)
        • A40i - 1…e5 2.dxe5 Nc6 3.Nf3 Nge7 - Englund Gambit: Zilbermints (1)
        • A40i - 1…e5 2.dxe5 Nc6 3.Nf3 Qe7 - Englund Gambit: (0)
        • A40j - 1…Nc6 - Bogoljubow-Miles Defence (0)
        • A40j - 1…Nc6 2.Bg5 - Bogoljubow-Miles (2)
        • A40j - 1…Nc6 2.d5 - Bogoljubow-Miles (0)
        • A40k - 1…Nc6 2.c4 - Bogoljubow-Miles (0)
        • A40k - 1…Nc6 2.c4 e5 3.dxe5 Nxe5 4.Nc3 Nxc4 - Bogoljubow-Miles Pozarek Gambit (1)
        • A40l - 1…Nc6 2.Nf3 - Bogoljubow-Miles (4)
        • A40m - 1…e6 (8)
        • A40n - 1…e6 2.Nf3 (0)
        • A40n - 1…e6 2.Nf3 c5 (7)
        • A40o - 1…e6 2.c4 (1)
        • A40p - 1…e6 2.c4 Bb4+ - Keres Defence (18)
        • A40q - 1…e6 2.c4 Bb4+ 3.Bd2 - Keres Defence (0)
        • A40q - 1…e6 2.c4 Bb4+ 3.Bd2 Bxd2+ - Keres Defence (0)
        • A40q - 1…e6 2.c4 Bb4+ 3.Bd2 Bxd2+ 4.Qxd2 b6 5.Nc3 Bb7 6.e4 Nh6 - Keres Defence Kangaroo Variation (14)
        • A40r - 1…e6 2.c4 Bb4+ 3.Bd2 a5 - Keres Defence (14)
        • A40s - 1…g6 - Modern (8)
        • A40t - 1…g6 2.Nf3 - Modern (15)
        • A40u - 1…g6 2.c4 - Modern (0)
        • A40u - 1…g6 2.c4 Bg7 - Modern (2)
        • A40v - 1…g6 2.c4 Bg7 3.e4 - Modern (12)
        • A40w - 1…g6 2.c4 Bg7 3.Nf3 - Modern (0)
        • A40w - 1…g6 2.c4 Bg7 3.Nf3 c5 - Modern (16)
        • A40x - 1…g6 2.c4 Bg7 3.Nc3 c5 4.d5 - Modern (0)
        • A40y - 1…g6 2.c4 Bg7 3.Nc3 c5 4.d5 Bxc3+ 5.bxc3 f5 - Modern Beefeater Defence (2)
      • A41 - 1.d4 d6 - Neo-Old Indian (352)
        • A41a - Neo-Old Indian (173)
        • A41b - 2.Bg5 (2)
        • A41c - 2.g3 (3)
        • A41d - 2.Nf3 (7)
        • A41e - 2.Nf3 g6 - Neo-Old Indian / Modern (1)
        • A41e - 2.Nf3 g6 3.Bf4 - Neo-Old Indian / Modern: (0)
        • A41e - 2.Nf3 g6 3.Bf4 Bg7 - Neo-Old Indian / Modern: (0)
        • A41e - 2.Nf3 g6 3.g3 - Neo-Old Indian / Modern: (0)
        • A41e - 2.Nf3 g6 3.g3 Bg7 - Neo-Old Indian / Modern: (0)
        • A41e - 2.Nf3 g6 3.g3 Bg7 4.Bg2 - Neo-Old Indian / Modern: (22)
        • A41f - 2.Nf3 Bg4 - Wade Defence (0)
        • A41f - 2.Nf3 Bg4 3.e3 - Wade Defence (0)
        • A41f - 2.Nf3 Bg4 3.e3 Nd7 - Wade Defence (12)
        • A41f - 2.Nf3 Bg4 3.e3 Nf6 - Wade Defence (0)
        • A41g - 2.Nf3 Bg4 3.c4 - Wade Defence (0)
        • A41g - 2.Nf3 Bg4 3.c4 e5 - Wade Defence (0)
        • A41g - 2.Nf3 Bg4 3.c4 e5 4.dxe5 - Wade Defence (0)
        • A41g - 2.Nf3 Bg4 3.c4 e5 4.dxe5 Nc6 - Wade Defence Gambit (4)
        • A41g - 2.Nf3 Bg4 3.c4 e5 4.Nc3 - Wade Defence (0)
        • A41g - 2.Nf3 Bg4 3.c4 e5 4.Nc3 Nc6 - Wade Defence (0)
        • A41h - 2.Nf3 Bg4 3.c4 Nd7 - Wade Defence (0)
        • A41h - 2.Nf3 Bg4 3.c4 Nd7 4.Nc3 - Wade Defence (0)
        • A41h - 2.Nf3 Bg4 3.c4 Nd7 4.Nc3 e5 - Wade Defence (8)
        • A41i - 2.Nf3 Bg4 3.c4 Bxf3 - Wade Defence (11)
        • A41j - 2.Nf3 Bg4 3.e4 - Wade Defence (5)
        • A41k - 2.Nf3 Bg4 3.e4 Nf6 - Wade Defence (14)
        • A41l - 2.c4 (0)
        • A41m - 2.c4 e5 (1)
        • A41n - 2.c4 e5 3.d5 (1)
        • A41o - 2.c4 e5 3.dxe5 (0)
        • A41o - 2.c4 e5 3.dxe5 dxe5 4.Qxd8+ Kxd8 - Queenswap (1)
        • A41p - 2.c4 e5 3.Nf3 (0)
        • A41p - 2.c4 e5 3.Nf3 e4 (5)
        • A41q - 2.c4 g6 - Modern (0)
        • A41q - 2.c4 g6 3.e4 - Modern (0)
        • A41q - 2.c4 g6 3.e4 Bg7 - Modern (10)
        • A41r - 2.c4 g6 3.Nf3 - Modern (0)
        • A41r - 2.c4 g6 3.Nf3 Bg7 - Modern (0)
        • A41r - 2.c4 g6 3.Nf3 Bg7 4.g3 - Modern (12)
        • A41s - 2.c4 g6 3.Nf3 Bg7 4.e4 - Modern (0)
        • A41s - 2.c4 g6 3.Nf3 Bg7 4.e4 Bg4 - Modern Rossolimo Variation (14)
        • A41t - 2.c4 g6 3.Nc3 - Modern (0)
        • A41t - 2.c4 g6 3.Nc3 Bg7 - Modern (2)
        • A41u - 2.c4 g6 3.Nc3 Bg7 4.Nf3 - Modern (15)
        • A41v - 2.c4 g6 3.Nc3 Bg7 4.Nf3 Bg4 - Modern (7)
        • A41w - 2.c4 g6 3.Nc3 Bg7 4.Nf3 Bg4 5.e3 - Modern (0)
        • A41w - 2.c4 g6 3.Nc3 Bg7 4.Nf3 Bg4 5.e3 Nc6 - Modern (16)
      • A42 - 1.d4 d6 2.c4 g6 3.Nc3 Bg7 4.e4 - Modern (139)
        • A42a - Averbakh (69)
        • A42b - 4…f5 - Averbakh Randspringer Variation (0)
        • A42b - 4…f5 5.Nf3 - Averbakh Randspringer (0)
        • A42c - 4…c5 - Pterodactyl (0)
        • A42c - 4…c5 5.Nf3 - Pterodactyl (0)
        • A42c - 4…c5 5.Nf3 Qa5 - Pterodactyl (7)
        • A42d - 4…c6 - Averbakh (0)
        • A42d - 4…c6 5.Be3 - Averbakh (3)
        • A42e - 4…c6 5.Nf3 - Averbakh (2)
        • A42f - 4…Nd7 - Averbakh (0)
        • A42f - 4…Nd7 5.Nf3 - Averbakh (1)
        • A42g - 4…Nc6 - Averbakh Kotov Variation (0)
        • A42g - 4…Nc6 5.Nf3 - Averbakh Kotov (0)
        • A42g - 4…Nc6 5.Nge2 - Averbakh Kotov (3)
        • A42h - 4…Nc6 5.d5 - Averbakh Kotov (3)
        • A42i - 4…Nc6 5.Be3 - Averbakh Kotov (2)
        • A42j - 4…Nc6 5.Be3 e5 - Averbakh Kotov (0)
        • A42j - 4…Nc6 5.Be3 e5 6.Nge2 - Averbakh Kotov (7)
        • A42k - 4…Nc6 5.Be3 e5 6.d5 - Averbakh Kotov (0)
        • A42l - 4…Nc6 5.Be3 e5 6.d5 Nce7 - Averbakh Kotov (0)
        • A42l - 4…Nc6 5.Be3 e5 6.d5 Nce7 7.c5 - Averbakh Kotov (4)
        • A42m - 4…Nc6 5.Be3 e5 6.d5 Nce7 7.g4 - Averbakh Kotov (1)
        • A42n - 4…e5 - Averbakh (1)
        • A42o - 4…e5 5.Nge2 - Averbakh (4)
        • A42p - 4…e5 5.Nf3 - Averbakh (16)
        • A42q - 4…e5 5.Nf3 Nd7 - Averbakh (1)
        • A42r - 4…e5 5.Nf3 Nd7 6.Be2 - Averbakh (1)
        • A42s - 4…e5 5.Nf3 Nd7 6.Be2 Ne7 - Averbakh (2)
        • A42t - 4…e5 5.d5 - Averbakh (8)
        • A42u - 4…e5 5.d5 Nd7 - Averbakh (0)
        • A42v - 4…e5 5.dxe5 - Averbakh (0)
        • A42v - 4…e5 5.dxe5 dxe5 - Averbakh (0)
        • A42v - 4…e5 5.dxe5 dxe5 6.Qxd8+ Kxd8 - Averbakh Queenswap (1)
        • A42w - 4…e5 5.dxe5 dxe5 6.Qxd8+ Kxd8 7.f4 - Averbakh Queenswap (2)
      • A43 - 1.d4 c5 - Old Benoni (168)
        • A43a - 2.b4 - Nakamura Gambit (0)
        • A43a - Old Benoni (87)
        • A43b - 2.dxc5 (0)
        • A43b - 2.dxc5 b6 - Cormorant Gambit (1)
        • A43c - 2.c3 (0)
        • A43d - 2.e3 (0)
        • A43e - 2.d5 (0)
        • A43e - 2.d5 b5 (2)
        • A43f - 2.d5 e6 (2)
        • A43g - 2.d5 e6 3.e4 - Franco-Benoni (0)
        • A43h - 2.d5 e6 3.c4 (0)
        • A43h - 2.d5 e6 3.c4 exd5 4.cxd5 (0)
        • A43h - 2.d5 e6 3.c4 exd5 4.cxd5 d6 (0)
        • A43h - 2.d5 e6 3.c4 exd5 4.cxd5 d6 5.e4 (5)
        • A43i - 2.d5 e6 3.c4 exd5 4.cxd5 d6 5.Nc3 (0)
        • A43i - 2.d5 e6 3.c4 exd5 4.cxd5 d6 5.Nc3 g6 6.e4 Bg7 (0)
        • A43i - 2.d5 e6 3.c4 exd5 4.cxd5 d6 5.Nc3 g6 6.e4 Bg7 7.Nf3 (9)
        • A43j - 2.d5 f5 - Clarendon Court Defence (0)
        • A43j - 2.d5 f5 3.c4 - Clarendon Court (0)
        • A43j - 2.d5 f5 3.g3 - Clarendon Court (0)
        • A43j - 2.d5 f5 3.Nc3 - Clarendon Court (0)
        • A43k - 2.d5 Nf6 (0)
        • A43k - 2.d5 Nf6 3.Nc3 (0)
        • A43k - 2.d5 Nf6 3.Nc3 Qa5 - Woozle (1)
        • A43l - 2.d5 Nf6 3.Nf3 (0)
        • A43l - 2.d5 Nf6 3.Nf3 e6 (0)
        • A43l - 2.d5 Nf6 3.Nf3 e6 4.Nc3 (6)
        • A43m - 2.d5 Nf6 3.Nf3 g6 (0)
        • A43m - 2.d5 Nf6 3.Nf3 g6 4.Nc3 (5)
        • A43n - 2.d5 Nf6 3.Nf3 b5 - Neo-Benko (4)
        • A43o - 2.d5 Nf6 3.Nf3 b5 4.Bg5 - Neo-Benko (10)
        • A43p - 2.d5 Nf6 3.Nf3 b5 4.Bg5 d6 - Neo-Benko (3)
        • A43q - 2.d5 Nf6 3.Nf3 b5 4.Bg5 Ne4 - Neo-Benko (6)
        • A43r - 2.d5 Nf6 3.Nf3 c4 - Hawk (0)
        • A43r - 2.d5 Nf6 3.Nf3 c4 4.e4 - Hawk (0)
        • A43s - 2.d5 d6 - Schmidt (0)
        • A43s - 2.d5 d6 3.e4 - Schmidt (0)
        • A43s - 2.d5 d6 3.Nc3 - Schmidt (0)
        • A43s - 2.d5 d6 3.Nc3 g6 - Schmidt (0)
        • A43s - 2.d5 d6 3.Nc3 Nf6 - Schmidt (0)
        • A43s - 2.d5 d6 3.Nf3 - Schmidt (0)
        • A43s - 2.d5 d6 3.Nf3 Nf6 - Schmidt (2)
        • A43t - 2.d5 d6 3.e4 g6 - Schmidt (0)
        • A43t - 2.d5 d6 3.e4 g6 4.Nc3 Bg7 - Schmidt (0)
        • A43t - 2.d5 d6 3.e4 g6 4.Nf3 Bg7 - Schmidt (0)
        • A43t - 2.d5 d6 3.e4 g6 4.Nf3 Bg7 5.Be2 - Schmidt (5)
        • A43u - 2.d5 d6 3.e4 Nf6 - Schmidt (0)
        • A43u - 2.d5 d6 3.e4 Nf6 4.Nc3 - Schmidt (0)
        • A43u - 2.d5 d6 3.e4 Nf6 4.Nc3 g6 - Schmidt (2)
        • A43u - 2.d5 d6 3.e4 Nf6 4.Nc3 g6 5.Nf3 - Schmidt (0)
        • A43u - 2.d5 d6 3.e4 Nf6 4.Nc3 g6 5.Nf3 Bg7 - Schmidt (5)
        • A43v - 2.d5 d6 3.e4 Nf6 4.Nc3 g6 5.Nf3 Bg7 6.h3 - Schmidt (0)
        • A43v - 2.d5 d6 3.e4 Nf6 4.Nc3 g6 5.Nf3 Bg7 6.h3 O-O - Schmidt (1)
        • A43w - 2.d5 d6 3.e4 Nf6 4.Nc3 g6 5.Nf3 Bg7 6.Bb5+ - Schmidt (6)
        • A43x - 2.d5 d6 3.e4 Nf6 4.Nc3 g6 5.Nf3 Bg7 6.Be2 O-O 7.O-O e6 - Schmidt (0)
        • A43y - 2.d5 d6 3.e4 Nf6 4.Nc3 g6 5.Nf3 Bg7 6.Be2 O-O 7.O-O Na6 - Schmidt (5)
        • A43z - 2.d5 d6 3.e4 Nf6 4.Nc3 g6 5.Nf3 Bg7 6.Be2 O-O 7.O-O Na6 8.h3 - Schmidt (4)
      • A44 - 1.d4 c5 2.d5 e5 - Old Benoni (8)
        • A44a - Czech (4)
        • A44b - 3.dxe6 - Czech (0)
        • A44c - 3.c4 - Czech (0)
        • A44d - 3.c4 d6 - Czech (0)
        • A44e - 3.c4 d6 4.e4 - Czech (0)
        • A44f - 3.c4 d6 4.e4 Be7 - Czech (0)
        • A44g - 3.c4 d6 4.e4 Be7 5.Nc3 - Czech (1)
        • A44h - 3.c4 d6 4.e4 g6 - Czech (0)
        • A44h - 3.c4 d6 4.e4 g6 5.Nc3 - Czech (0)
        • A44i - 3.c4 d6 4.e4 g6 5.Nc3 Bg7 - Czech (0)
        • A44j - 3.c4 d6 4.e4 g6 5.Nc3 Bg7 6.Nf3 - Czech (0)
        • A44k - 3.c4 d6 4.e4 g6 5.Nc3 Bg7 6.Bd3 - Czech (0)
        • A44l - 3.e4 - Czech (0)
        • A44m - 3.e4 d6 - Czech (0)
        • A44n - 3.e4 d6 4.Nf3 - Czech (0)
        • A44o - 3.e4 d6 4.Bb5+ - Czech (0)
        • A44p - 3.e4 d6 4.Bd3 - Czech (0)
        • A44q - 3.e4 d6 4.Nc3 - Czech (0)
        • A44r - 3.e4 d6 4.Nc3 Nf6 - Czech (0)
        • A44s - 3.e4 d6 4.Nc3 g6 - Czech (1)
        • A44t - 3.e4 d6 4.Nc3 a6 - Czech (0)
        • A44u - 3.e4 d6 4.Nc3 a6 5.a4 Be7 - Czech (0)
        • A44v - 3.e4 d6 4.Nc3 Be7 - Czech (1)
        • A44w - 3.e4 d6 4.Nc3 Be7 5.Bb5+ - Czech (1)
        • A44x - 3.e4 d6 4.Nc3 Be7 5.Nf3 - Czech (0)
        • A44y - 3.e4 d6 4.Nc3 Be7 5.Nf3 Bg4 - Czech (0)
      • A45 - 1.d4 Nf6 - Queen’s Pawn (274)
        • A45a - 2.e4 - Indian: Omega Gambit (0)
        • A45a - 2.e4 Nxe4 3.Bd3 Nf6 4.Nf3 - Indian: Arafat Gambit (1)
        • A45a - 2.f3 - Indian: Paleface Attack (0)
        • A45a - 2.f3 d5 3.e4 - Indian: Blackmar-Diemer Gambit (without Nc3) (2)
        • A45a - 2.f3 d5 3.g4 - Indian: Gedult Attack (0)
        • A45a - 2.g4 - Indian: Gibbins Gambit (0)
        • A45a - 2.g4 e5 - Indian: Gibbins Gambit Oshima Defence (0)
        • A45a - 2.g4 Nxg4 - Indian: Gibbins Gambit Accepted (0)
        • A45b - 2.f4 - Indian: Canard Opening (0)
        • A45c - 2.Nd2 - Indian: (0)
        • A45c - 2.Nd2 e5 - Indian: Lazard Gambit (1)
        • A45d - 2.e3 - Indian: (0)
        • A45d - 2.e3 e6 - Indian: (1)
        • A45d - 2.e3 g6 - Indian: (0)
        • A45e - 2.c3 - Indian: (1)
        • A45e - 2.c3 g6 - Indian: (0)
        • A45e - 2.c3 g6 3.Bg5 - Indian: (5)
        • A45f - 2.Nc3 - Indian: (1)
        • A45g - 2.Bf4 - Indian: (16)
        • A45h - 2.g3 - Indian: (0)
        • A45h - 2.g3 g6 - Indian: (3)
        • A45i - 2.g3 c5 - Indian: (0)
        • A45i - 2.g3 c5 3.d5 b5 - Indian: (2)
        • A45j - 2.Bg5 - Trompowsky Opening (1)
        • A45j - 2.Bg5 d6 - Trompowsky (0)
        • A45j - 2.Bg5 d6 3.Bxf6 - Trompowsky (3)
        • A45j - 2.Bg5 d6 3.Nc3 - Trompowsky (0)
        • A45k - 2.Bg5 g6 - Trompowsky (1)
        • A45k - 2.Bg5 g6 3.Bxf6 - Trompowsky (6)
        • A45k - 2.Bg5 g6 3.Nc3 - Trompowsky (0)
        • A45l - 2.Bg5 g6 3.Bxf6 exf6 4.e3 - Trompowsky (11)
        • A45m - 2.Bg5 e6 - Trompowsky: (3)
        • A45m - 2.Bg5 e6 3.e3 - Trompowsky: (0)
        • A45m - 2.Bg5 e6 3.Nc3 - Trompowsky: (31)
        • A45m - 2.Bg5 e6 3.Nd2 - Trompowsky: (2)
        • A45n - 2.Bg5 e6 3.e4 - Trompowsky: (1)
        • A45n - 2.Bg5 e6 3.e4 h6 - Trompowsky: (0)
        • A45n - 2.Bg5 e6 3.e4 h6 4.Bxf6 - Trompowsky: (0)
        • A45n - 2.Bg5 e6 3.e4 h6 4.Bxf6 Qxf6 - Trompowsky: (0)
        • A45n - 2.Bg5 e6 3.e4 h6 4.Bxf6 Qxf6 5.c3 - Trompowsky: (34)
        • A45o - 2.Bg5 e6 3.e4 h6 4.Bxf6 Qxf6 5.Nc3 - Trompowsky: (0)
        • A45o - 2.Bg5 e6 3.e4 h6 4.Bxf6 Qxf6 5.Nc3 Bb4 - Trompowsky: (0)
        • A45o - 2.Bg5 e6 3.e4 h6 4.Bxf6 Qxf6 5.Nc3 d6 - Trompowsky: (0)
        • A45o - 2.Bg5 e6 3.e4 h6 4.Bxf6 Qxf6 5.Nc3 d6 6.Qd2 - Trompowsky: (0)
        • A45o - 2.Bg5 e6 3.e4 h6 4.Bxf6 Qxf6 5.Nc3 d6 6.Qd2 g5 - Trompowsky: (10)
        • A45p - 2.Bg5 c5 - Trompowsky: (4)
        • A45p - 2.Bg5 c5 3.d5 - Trompowsky: (2)
        • A45p - 2.Bg5 c5 3.d5 Qb6 - Trompowsky: (0)
        • A45p - 2.Bg5 c5 3.d5 Qb6 4.Nc3 - Trompowsky: (13)
        • A45p - 2.Bg5 c5 3.dxc5 - Trompowsky: (0)
        • A45p - 2.Bg5 c5 3.Nc3 - Trompowsky: (0)
        • A45q - 2.Bg5 c5 3.Bxf6 - Trompowsky: (3)
        • A45q - 2.Bg5 c5 3.Bxf6 gxf6 - Trompowsky: (0)
        • A45q - 2.Bg5 c5 3.Bxf6 gxf6 4.d5 - Trompowsky: (6)
        • A45r - 2.Bg5 c5 3.Bxf6 gxf6 4.d5 Qb6 - Trompowsky: (0)
        • A45r - 2.Bg5 c5 3.Bxf6 gxf6 4.d5 Qb6 5.Qc1 - Trompowsky: (0)
        • A45r - 2.Bg5 c5 3.Bxf6 gxf6 4.d5 Qb6 5.Qc1 f5 - Trompowsky: (0)
        • A45r - 2.Bg5 c5 3.Bxf6 gxf6 4.d5 Qb6 5.Qc1 f5 6.c4 - Trompowsky: (0)
        • A45r - 2.Bg5 c5 3.Bxf6 gxf6 4.d5 Qb6 5.Qc1 f5 6.e3 - Trompowsky: (0)
        • A45r - 2.Bg5 c5 3.Bxf6 gxf6 4.d5 Qb6 5.Qc1 f5 6.e3 Bg7 - Trompowsky: (11)
        • A45r - 2.Bg5 c5 3.Bxf6 gxf6 4.d5 Qb6 5.Qc1 f5 6.g3 - Trompowsky: (0)
        • A45s - 2.Bg5 Ne4 - Trompowsky: (1)
        • A45s - 2.Bg5 Ne4 3.h4 - Trompowsky: (0)
        • A45s - 2.Bg5 Ne4 3.h4 c5 - Trompowsky: (0)
        • A45s - 2.Bg5 Ne4 3.h4 c5 4.d5 - Trompowsky: (0)
        • A45s - 2.Bg5 Ne4 3.h4 c5 4.dxc5 - Trompowsky: (7)
        • A45s - 2.Bg5 Ne4 3.h4 d5 - Trompowsky: (0)
        • A45t - 2.Bg5 Ne4 3.Bh4 - Trompowsky: (0)
        • A45t - 2.Bg5 Ne4 3.Bh4 c5 - Trompowsky: (0)
        • A45t - 2.Bg5 Ne4 3.Bh4 c5 4.f3 - Trompowsky: (5)
        • A45t - 2.Bg5 Ne4 3.Bh4 d5 - Trompowsky: (0)
        • A45t - 2.Bg5 Ne4 3.Bh4 g5 - Trompowsky: (0)
        • A45u - 2.Bg5 Ne4 3.Bf4 - Trompowsky: (10)
        • A45u - 2.Bg5 Ne4 3.Bf4 d5 - Trompowsky: (0)
        • A45u - 2.Bg5 Ne4 3.Bf4 d5 4.Nd2 - Trompowsky: (10)
        • A45u - 2.Bg5 Ne4 3.Bf4 g5 - Trompowsky: Borg Variation (0)
        • A45v - 2.Bg5 Ne4 3.Bf4 d5 4.f3 - Trompowsky: (0)
        • A45v - 2.Bg5 Ne4 3.Bf4 d5 4.f3 Nf6 - Trompowsky: (3)
        • A45w - 2.Bg5 Ne4 3.Bf4 d5 4.e3 - Trompowsky: (0)
        • A45w - 2.Bg5 Ne4 3.Bf4 d5 4.e3 c5 - Trompowsky: (17)
        • A45x - 2.Bg5 Ne4 3.Bf4 c5 4.d5 Qb6 - Trompowsky: (0)
        • A45y - 2.Bg5 Ne4 3.Bf4 c5 4.f3 - Trompowsky: (0)
        • A45y - 2.Bg5 Ne4 3.Bf4 c5 4.f3 Qa5+ - Trompowsky: (0)
        • A45y - 2.Bg5 Ne4 3.Bf4 c5 4.f3 Qa5+ 5.c3 Nf6 6.d5 - Trompowsky: (16)
        • A45z - 2.Bg5 Ne4 3.Bf4 c5 4.f3 Qa5+ 5.c3 Nf6 6.Nd2 - Trompowsky: (7)
      • A46 - 1.d4 Nf6 2.Nf3 - Indian (768)
        • A46a - 2…Ne4 - Doery Defence (538)
        • A46a - 2.Nf3 (1)
        • A46b - 2…b5 (0)
        • A46b - 2…b5 3.g3 (2)
        • A46c - 2…c5 - Neo-Benoni (0)
        • A46c - 2…c5 3.dxc5 - Neo-Benoni (0)
        • A46c - 2…c5 3.e3 - Neo-Benoni: (0)
        • A46c - 2…c5 3.e3 cxd4 - Neo-Benoni: (3)
        • A46d - 2…c5 3.c3 - Neo-Benoni: (0)
        • A46d - 2…c5 3.c3 b6 - Neo-Benoni: (0)
        • A46d - 2…c5 3.c3 cxd4 - Neo-Benoni: (8)
        • A46d - 2…c5 3.c3 g6 - Neo-Benoni: (0)
        • A46e - 2…c5 3.c3 e6 - Neo-Benoni: (0)
        • A46f - 2…c5 3.g3 - Neo-Benoni: (0)
        • A46f - 2…c5 3.g3 cxd4 - Neo-Benoni: (0)
        • A46f - 2…c5 3.g3 cxd4 4.Nxd4 - Neo-Benoni: (0)
        • A46g - 2…d6 (26)
        • A46h - 2…d6 3.g3 (0)
        • A46i - 2…d6 3.Bg5 (0)
        • A46i - 2…d6 3.Bg5 Nbd7 (2)
        • A46j - 2…e6 (0)
        • A46j - 2…e6 3.c3 (0)
        • A46j - 2…e6 3.c3 b6 (0)
        • A46j - 2…e6 3.c3 b6 4.Bg5 (2)
        • A46k - 2…e6 3.e3 (4)
        • A46k - 2…e6 3.e3 c5 (8)
        • A46l - 2…e6 3.e3 c5 4.Bd3 (5)
        • A46m - 2…e6 3.g3 (2)
        • A46m - 2…e6 3.g3 b5 (0)
        • A46m - 2…e6 3.g3 b5 4.Bg2 Bb7 (33)
        • A46n - 2…e6 3.g3 b5 4.Bg2 Bb7 5.O-O (22)
        • A46o - 2…e6 3.g3 c5 (0)
        • A46o - 2…e6 3.g3 c5 4.Bg2 (0)
        • A46o - 2…e6 3.g3 c5 4.Bg2 cxd4 (20)
        • A46o - 2…e6 3.g3 c5 4.Bg2 Nc6 (0)
        • A46o - 2…e6 3.g3 c5 4.Bg2 Qa5+ (0)
        • A46o - 2…e6 3.g3 c5 4.Bg2 Qc7 (0)
        • A46p - 2…e6 3.Bf4 - London System (9)
        • A46p - 2…e6 3.Bf4 c5 - London (0)
        • A46p - 2…e6 3.Bf4 c5 4.e3 - London (0)
        • A46p - 2…e6 3.Bf4 c5 4.e3 Qb6 - London (28)
        • A46q - 2…e6 3.Bf4 c5 4.c3 - London (4)
        • A46r - 2…e6 3.Bg5 - Torre Attack (15)
        • A46r - 2…e6 3.Bg5 b6 - Torre Attack: (0)
        • A46r - 2…e6 3.Bg5 Be7 - Torre Attack: (4)
        • A46s - 2…e6 3.Bg5 c5 - Torre Attack: (0)
        • A46s - 2…e6 3.Bg5 c5 4.e4 - Torre Attack: Wagner Gambit (1)
        • A46t - 2…e6 3.Bg5 c5 4.c3 - Torre Attack: (0)
        • A46t - 2…e6 3.Bg5 c5 4.c3 h6 - Torre Attack: (0)
        • A46t - 2…e6 3.Bg5 c5 4.c3 h6 5.Bh4 - Torre Attack: (12)
        • A46t - 2…e6 3.Bg5 c5 4.c3 Qb6 - Torre Attack: (0)
        • A46u - 2…e6 3.Bg5 c5 4.e3 - Torre Attack: (0)
        • A46u - 2…e6 3.Bg5 c5 4.e3 cxd4 - Torre Attack: (14)
        • A46u - 2…e6 3.Bg5 c5 4.e3 Qb6 - Torre Attack: (0)
        • A46v - 2…e6 3.Bg5 c5 4.e3 Be7 - Torre Attack: (13)
        • A46w - 2…e6 3.Bg5 c5 4.e3 h6 - Torre Attack: (0)
        • A46w - 2…e6 3.Bg5 c5 4.e3 h6 5.Bh4 - Torre Attack: (15)
        • A46x - 2…e6 3.Bg5 h6 4.Bh4 g5 - Torre Attack: (0)
        • A46y - 2…e6 3.Bg5 h6 4.Bxf6 - Torre Attack: (0)
        • A46y - 2…e6 3.Bg5 h6 4.Bxf6 Qxf6 5.e4 - Torre Attack: (0)
        • A46y - 2…e6 3.Bg5 h6 4.Bxf6 Qxf6 5.e4 b6 - Torre Attack: (10)
        • A46y - 2…e6 3.Bg5 h6 4.Bxf6 Qxf6 5.e4 c5 - Torre Attack: (0)
        • A46z - 2…e6 3.Bg5 h6 4.Bxf6 Qxf6 5.e4 d6 - Torre Attack: (0)
        • A46z - 2…e6 3.Bg5 h6 4.Bxf6 Qxf6 5.e4 d6 6.Nc3 - Torre Attack: (0)
        • A46z - 2…e6 3.Bg5 h6 4.Bxf6 Qxf6 5.e4 d6 6.Nc3 g6 - Torre Attack: (0)
        • A46z - 2…e6 3.Bg5 h6 4.Bxf6 Qxf6 5.e4 d6 6.Nc3 Nd7 - Torre Attack: (0)
        • A46z - 2…e6 3.Bg5 h6 4.Bxf6 Qxf6 5.e4 d6 6.Nc3 Nd7 7.Qd2 - Torre Attack: (5)
      • A47 - 1.d4 Nf6 2.Nf3 b6 - Neo-Queen’s Indian (127)
      • A48 - 1.d4 Nf6 2.Nf3 g6 - Neo-King’s Indian (776)
        • A48a - 3.Nbd2 - Neo-King’s Indian (75)
        • A48a - Neo-King’s Indian (441)
        • A48b - 3.c3 - Neo-King’s Indian (0)
        • A48b - 3.c3 Bg7 - Neo-King’s Indian (0)
        • A48c - 3.e3 - Neo-King’s Indian (0)
        • A48c - 3.e3 Bg7 - Neo-King’s Indian (13)
        • A48d - 3.e3 c5 - Neo-King’s Indian (7)
        • A48e - 3.Nc3 - Neo-King’s Indian (0)
        • A48f - 3.Bf4 - London System (10)
        • A48g - 3.Bf4 Bg7 - London System (9)
        • A48h - 3.Bf4 Bg7 4.Nbd2 - London System (4)
        • A48i - 3.Bf4 Bg7 4.c3 - London System (15)
        • A48j - 3.Bf4 Bg7 4.e3 - London System (2)
        • A48j - 3.Bf4 Bg7 4.e3 O-O - London System (29)
        • A48k - 3.Bf4 Bg7 4.e3 O-O 5.Be2 - London System (0)
        • A48k - 3.Bf4 Bg7 4.e3 O-O 5.Be2 d6 - London System (32)
        • A48l - 3.Bf4 Bg7 4.e3 O-O 5.Be2 d6 6.h3 - London System (48)
        • A48m - 3.Bg5 - Torre Attack (6)
        • A48n - 3.Bg5 Ne4 - Torre Attack (1)
        • A48o - 3.Bg5 Bg7 - Torre Attack (0)
        • A48o - 3.Bg5 Bg7 4.c3 - Torre Attack (21)
        • A48o - 3.Bg5 Bg7 4.e3 - Torre Attack (0)
        • A48p - 3.Bg5 Bg7 4.Nc3 - Torre Attack (0)
        • A48q - 3.Bg5 Bg7 4.Nbd2 - Torre Attack (24)
        • A48r - 3.Bg5 Bg7 4.Nbd2 O-O - Torre Attack (10)
        • A48s - 3.Bg5 Bg7 4.Nbd2 O-O 5.e4 - Torre Attack (0)
        • A48t - 3.Bg5 Bg7 4.Nbd2 O-O 5.e4 d6 - Torre Attack (0)
        • A48u - 3.Bg5 Bg7 4.Nbd2 O-O 5.e4 d5 - Torre Attack (6)
        • A48v - 3.Bg5 Bg7 4.Nbd2 O-O 5.c3 - Torre Attack (0)
        • A48v - 3.Bg5 Bg7 4.Nbd2 O-O 5.c3 d6 - Torre Attack (12)
        • A48w - 3.Bg5 Bg7 4.Nbd2 O-O 5.c3 d6 6.e4 - Torre Attack (39)
        • A48x - 3.Bg5 Bg7 4.Nbd2 O-O 5.c3 d6 6.e4 c5 - Torre Attack (0)
      • A49 - 1.d4 Nf6 2.Nf3 g6 3.g3 - Neo-King’s Indian (147)
    • A50 - A59 1. d4 Nf6 2. c4 (420)
      • A50 - 1.d4 Nf6 2.c4 - Indian (457)
        • A50a - 2.c4 (92)
        • A50b - 2…Nc6 - Mexican Defence (Two Knights Tango) (0)
        • A50c - 2…Nc6 3.Nc3 - Mexican Defence (1)
        • A50d - 2…Nc6 3.Nf3 - Mexican Defence (0)
        • A50d - 2…Nc6 3.Nf3 d6 - Mexican Defence (1)
        • A50e - 2…Nc6 3.Nf3 e6 - Mexican Defence (7)
        • A50f - 2…Nc6 3.Nf3 e6 4.a3 - Mexican Defence (9)
        • A50g - 2…Nc6 3.Nf3 e6 4.Nc3 - Mexican Defence (3)
        • A50h - 2…c6 - Slav-Indian (7)
        • A50i - 2…c6 3.Nf3 - Slav-Indian (0)
        • A50j - 2…c6 3.Nc3 - Slav-Indian (10)
        • A50k - 2…a6 (5)
        • A50l - 2…b6 - Queen’s Indian Accelerated (18)
        • A50m - 2…b6 3.Nc3 Bb7 - Queen’s Indian Accelerated (18)
        • A50n - 2…b6 3.Nc3 Bb7 4.Qc2 - Queen’s Indian Accelerated (13)
      • A51 - 1.d4 Nf6 2.c4 e5 - Budapest (5)
        • A51a - Budapest (2)
        • A51b - 3.e3 (1)
        • A51c - 3.d5 (1)
        • A51d - 3.dxe5 (0)
        • A51d - 3.dxe5 Ne4 - Fajarowicz (0)
        • A51e - 3.dxe5 Ne4 4.Qc2 - Fajarowicz Steiner Variation (0)
        • A51f - 3.dxe5 Ne4 4.Nd2 - Fajarowicz (0)
        • A51g - 3.dxe5 Ne4 4.a3 - Fajarowicz (0)
        • A51h - 3.dxe5 Ne4 4.Nf3 - Fajarowicz (0)
        • A51i - 3.dxe5 Ne4 4.Nf3 Bb4+ - Fajarowicz (0)
        • A51j - 3.dxe5 Ne4 4.Nf3 Nc6 - Fajarowicz (0)
        • A51k - 3.dxe5 Ne4 4.Nf3 Nc6 5.a3 - Fajarowicz (0)
      • A52 - 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 - Budapest (61)
        • A52a - 3…Ng4 (30)
        • A52b - 4.e3 (2)
        • A52c - 4.e4 - Alekhine Variation (0)
        • A52c - 4.e4 d6 - Alekhine Balogh Gambit (1)
        • A52d - 4.e4 Nxe5 5.f4 Nec6 - Alekhine Abonyi Variation (1)
        • A52e - 4.Nf3 - Adler Variation (0)
        • A52f - 4.Nf3 Bc5 - Adler (7)
        • A52g - 4.Nf3 Bc5 5.e3 Nc6 6.Be2 - Adler (6)
        • A52h - 4.Bf4 - Rubinstein Variation (6)
        • A52i - 4.Bf4 Bb4+ - Rubinstein (0)
        • A52j - 4.Bf4 Nc6 - Rubinstein (0)
        • A52k - 4.Bf4 Nc6 5.Nf3 Bb4+ - Rubinstein Main Line (2)
        • A52l - 4.Bf4 Nc6 5.Nf3 Bb4+ 6.Nbd2 - Rubinstein Main Line (1)
        • A52m - 4.Bf4 Nc6 5.Nf3 Bb4+ 6.Nbd2 Qe7 7.e3 - Rubinstein Main Line (4)
      • A53 - 1.d4 Nf6 2.c4 d6 - Old Indian (1)
      • A54 - 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 - Old Indian (31)
      • A55 - 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4 - Old Indian (26)
        • A55b - 5…g6 (0)
        • A55c - 5…c6 (0)
        • A55c - 5…c6 6.Be2 (2)
        • A55d - 5…Be7 (0)
        • A55e - 5…Be7 6.g3 (0)
        • A55e - 5…Be7 6.g3 c6 (0)
        • A55e - 5…Be7 6.g3 c6 7.Bg2 (0)
        • A55e - 5…Be7 6.g3 c6 7.Bg2 O-O (0)
        • A55e - 5…Be7 6.g3 c6 7.Bg2 O-O 8.O-O (0)
        • A55e - 5…Be7 6.g3 c6 7.Bg2 O-O 8.O-O Qc7 (1)
        • A55e - 5…Be7 6.g3 O-O (0)
        • A55f - 5…Be7 6.g3 c6 7.Bg2 O-O 8.O-O Re8 (2)
        • A55g - 5…Be7 6.g3 c6 7.Bg2 O-O 8.O-O a6 (0)
        • A55h - 5…Be7 6.g3 c6 7.Bg2 O-O 8.O-O a6 9.a4 (0)
        • A55i - 5…Be7 6.Be2 (0)
        • A55i - 5…Be7 6.Be2 O-O (1)
        • A55j - 5…Be7 6.Be2 c6 (0)
        • A55j - 5…Be7 6.Be2 c6 7.O-O (0)
        • A55j - 5…Be7 6.Be2 c6 7.O-O a6 (2)
        • A55k - 5…Be7 6.Be2 c6 7.O-O O-O - Main Line (5)
        • A55l - 5…Be7 6.Be2 c6 7.O-O O-O 8.h3 - Main Line (0)
        • A55m - 5…Be7 6.Be2 c6 7.O-O O-O 8.Be3 - Main Line (1)
        • A55n - 5…Be7 6.Be2 c6 7.O-O O-O 8.Be3 a6 - Main Line (0)
        • A55o - 5…Be7 6.Be2 c6 7.O-O O-O 8.Qc2 - Main Line (0)
        • A55o - 5…Be7 6.Be2 c6 7.O-O O-O 8.Qc2 Qc7 - Main Line (0)
        • A55o - 5…Be7 6.Be2 c6 7.O-O O-O 8.Qc2 Re8 - Main Line (1)
        • A55p - 5…Be7 6.Be2 c6 7.O-O O-O 8.Qc2 a6 - Main Line (5)
        • A55q - 5…Be7 6.Be2 c6 7.O-O O-O 8.Re1 - Main Line (1)
        • A55r - 5…Be7 6.Be2 c6 7.O-O O-O 8.Re1 Re8 - Main Line (0)
        • A55s - 5…Be7 6.Be2 c6 7.O-O O-O 8.Re1 a6 - Main Line (4)
        • A55t - 5…Be7 6.Be2 c6 7.O-O O-O 8.Re1 a6 9.Bf1 - Main Line (1)
      • A56 - 1.d4 Nf6 2.c4 c5 - Benoni (107)
        • A56a - 2…c5 (55)
        • A56b - 3.e3 (0)
        • A56b - 3.e3 e6 (3)
        • A56c - 3.e3 g6 (0)
        • A56d - 3.e3 g6 4.Nc3 (3)
        • A56e - 3.dxc5 (0)
        • A56f - 3.d5 (0)
        • A56g - 3.d5 a6 (1)
        • A56h - 3.d5 g6 (0)
        • A56h - 3.d5 g6 4.Nc3 (8)
        • A56i - 3.d5 d6 (0)
        • A56j - 3.d5 d6 4.Nc3 g6 (0)
        • A56j - 3.d5 g6 4.Nc3 d6 5.e4 b5 - Bronstein’s Gambit (0)
        • A56k - 3.d5 d6 4.Nc3 g6 5.e4 Bg7 (3)
        • A56l - 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.f3 (0)
        • A56m - 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.Bd3 (4)
        • A56n - 3.d5 Ne4 - Vulture (0)
        • A56o - 3.d5 e5 - Czech (1)
        • A56p - 3.d5 e5 4.Nc3 d6 - Czech (18)
        • A56q - 3.d5 e5 4.Nc3 d6 5.e4 g6 - Czech (0)
        • A56r - 3.d5 e5 4.Nc3 d6 5.e4 Be7 - Czech (1)
        • A56s - 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.g3 - Czech (0)
        • A56s - 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.g3 O-O - Czech (0)
        • A56s - 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.g3 O-O 7.Bg2 - Czech (6)
        • A56t - 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.g3 O-O 7.Bg2 Ne8 - Czech (2)
        • A56u - 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Bd3 - Czech (1)
        • A56v - 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Nf3 - Czech (2)
        • A56w - 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Nf3 O-O - Czech (0)
        • A56w - 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Nf3 O-O 7.h3 - Czech (0)
        • A56x - 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Nf3 O-O 7.Be2 - Czech (0)
      • A57 - 1.d4 Nf6 2.c4 c5 3.d5 b5 - Benko Gambit (1)
        • A57a - Benko Gambit (65)
        • A57b - 4.a4 (2)
        • A57c - 4.Nd2 (3)
        • A57d - 4.Nf3 (0)
        • A57d - 4.Nf3 bxc4 (7)
        • A57e - 4.Nf3 Bb7 (0)
        • A57e - 4.Nf3 Bb7 5.a4 (2)
        • A57f - 4.Nf3 g6 (2)
        • A57g - 4.Nf3 g6 5.cxb5 (0)
        • A57g - 4.Nf3 g6 5.cxb5 a6 (9)
        • A57h - 4.cxb5 (0)
        • A57i - 4.cxb5 a6 5.b6 (3)
        • A57j - 4.cxb5 a6 5.b6 Qxb6 (3)
        • A57k - 4.cxb5 a6 5.b6 d6 (5)
        • A57l - 4.cxb5 a6 5.b6 e6 (1)
        • A57m - 4.cxb5 a6 5.e3 (14)
        • A57n - 4.cxb5 a6 5.e3 g6 (0)
        • A57n - 4.cxb5 a6 5.e3 g6 6.Nc3 Bg7 (5)
        • A57n - 4.cxb5 a6 5.e3 g6 6.Nc3 d6 (0)
        • A57p - 4.cxb5 a6 5.f3 e6 (2)
        • A57q - 4.cxb5 a6 5.f3 axb5 (6)
        • A57r - 4.cxb5 a6 5.Nc3 - Zaitsev Variation (0)
        • A57r - 4.cxb5 a6 5.Nc3 Qa5 - Zaitsev (0)
        • A57s - 4.cxb5 a6 5.Nc3 axb5 - Zaitsev (0)
        • A57s - 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 - Zaitsev (1)
        • A57t - 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 d6 8.Nf3 - Zaitsev (0)
        • A57u - 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 d6 8.Bc4 - Zaitsev Nescafe Frappe Attack (1)
        • A57v - 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 d6 8.Bf4 - Zaitsev (0)
        • A57w - 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 d6 8.Bf4 g5 - Zaitsev (0)
      • A58 - 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 - Benko Gambit (77)
        • A58a - 5.bxa6 (37)
        • A58b - 5…g6 (14)
        • A58c - 5…Bxa6 (0)
        • A58c - 5…Bxa6 6.g3 - Accepted (1)
        • A58d - 5…Bxa6 6.g3 d6 7.Bg2 g6 - Accepted (0)
        • A58d - 5…Bxa6 6.g3 d6 7.Bg2 g6 8.b3 - Accepted (1)
        • A58e - 5…Bxa6 6.Nc3 - Accepted (0)
        • A58f - 5…Bxa6 6.Nc3 g6 - Accepted (0)
        • A58g - 5…Bxa6 6.Nc3 d6 - Accepted (0)
        • A58g - 5…Bxa6 6.Nc3 d6 7.f4 - Accepted (0)
        • A58g - 5…Bxa6 6.Nc3 d6 7.f4 g6 - Accepted (1)
        • A58h - 5…Bxa6 6.Nc3 d6 7.g3 - Accepted (0)
        • A58h - 5…Bxa6 6.Nc3 d6 7.g3 g6 - Accepted (0)
        • A58i - 5…Bxa6 6.Nc3 d6 7.Nf3 - Accepted (0)
        • A58i - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 - Accepted (0)
        • A58j - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.Nd2 - Accepted (0)
        • A58j - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.Nd2 Bg7 - Accepted (0)
        • A58j - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.Nd2 Qa5 - Accepted (1)
        • A58k - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 - Fianchetto Variation (0)
        • A58k - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 - Fianchetto Variation (0)
        • A58l - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bh3 - Fianchetto (1)
        • A58m - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bg2 - Fianchetto (0)
        • A58m - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bg2 Nbd7 - Fianchetto (4)
        • A58n - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bg2 Nbd7 10.O-O Nb6 - Fianchetto (6)
        • A58o - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bg2 O-O - Fianchetto (1)
        • A58p - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bg2 O-O 10.O-O Nbd7 - Fianchetto Main Line (0)
        • A58q - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bg2 O-O 10.O-O Nbd7 11.Rb1 - Fianchetto Main Line (4)
        • A58r - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bg2 O-O 10.O-O Nbd7 11.Re1 - Fianchetto Main Line (0)
        • A58s - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bg2 O-O 10.O-O Nbd7 11.Qc2 - Fianchetto Main Line (2)
        • A58t - 5…Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 9.Bg2 O-O 10.O-O Nbd7 11.Qc2 Qb6 - Fianchetto Main Line (1)
      • A59 - 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4 - Benko Gambit (50)
        • A59a - 7.e4 (25)
        • A59b - 7…Bxf1 8.Kxf1 g6 (0)
        • A59c - 7…Bxf1 8.Kxf1 g6 9.Nge2 - Line (0)
        • A59d - 7…Bxf1 8.Kxf1 g6 9.Nf3 - Line (0)
        • A59e - 7…Bxf1 8.Kxf1 g6 9.Nf3 Bg7 10.h3 - Line (0)
        • A59f - 7…Bxf1 8.Kxf1 g6 9.Nf3 Bg7 10.h3 Nbd7 - Line (1)
        • A59g - 7…Bxf1 8.Kxf1 g6 9.g4 - Line (1)
        • A59h - 7…Bxf1 8.Kxf1 g6 9.g3 - Line (1)
        • A59i - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 - Main Line (3)
        • A59j - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 - Main Line (11)
        • A59k - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.Re1 - Main Line (0)
        • A59l - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.Re1 Qa5 - Main Line (2)
        • A59m - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.Re1 Ng4 - Main Line (0)
        • A59n - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.h3 - Main Line (0)
        • A59o - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.h3 Ra6 - Main Line (0)
        • A59o - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.h3 Ra6 13.Re1 - Main Line (0)
        • A59p - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.h3 Qb6 - Main Line (0)
        • A59p - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.h3 Qb6 13.Re1 - Main Line (1)
        • A59q - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.h3 Qa5 - Main Line (0)
        • A59q - 7…Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O 11.Nf3 Nbd7 12.h3 Qa5 13.Re1 - Main Line (5)
    • A60-A79 1. d4 Nf6 2. c4 c6 3. d5 e6 Modern Benoni Defense (366)
      • A60 - 1.d4 Nf6 2.c4 c5 3.d5 e6 - Benoni (5)
        • A60a - 3.d5 e6 (0)
        • A60b - 4.Nf3 (0)
        • A60c - 4.Nf3 exd5 5.cxd5 (0)
        • A60d - 4.Nf3 exd5 5.cxd5 Bd6 - Snake Variation vs. (0)
        • A60e - 4.g3 (0)
        • A60f - 4.g3 exd5 5.cxd5 b5 (0)
        • A60g - 4.Nc3 (0)
        • A60h - 4.Nc3 exd5 5.Nxd5 (0)
        • A60i - 4.Nc3 exd5 5.cxd5 (0)
        • A60j - 4.Nc3 exd5 5.cxd5 Bd6 - Snake Variation (2)
        • A60k - 4.Nc3 exd5 5.cxd5 Bd6 6.Nf3 - Snake (0)
        • A60l - 4.Nc3 exd5 5.cxd5 Bd6 6.Nf3 Bc7 - Snake (0)
        • A60m - 4.Nc3 exd5 5.cxd5 Bd6 6.e4 - Snake (0)
        • A60n - 4.Nc3 exd5 5.cxd5 Bd6 6.e4 O-O 7.Nf3 - Snake (0)
        • A60o - 4.Nc3 exd5 5.cxd5 g6 (0)
        • A60p - 4.Nc3 exd5 5.cxd5 d6 (0)
        • A60q - 4.Nc3 exd5 5.cxd5 d6 6.Nf3 (0)
      • A62 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O - Benoni (50)
      • A63 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O Nbd7 - Benoni (13)
      • A64 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O Nbd7 10.Nd2 a6 11.a4 Re8 - Benoni (19)
      • A65 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 - Benoni (82)
        • A65a - 6…Be7 (0)
        • A65a - 6.e4 (49)
        • A65b - 6…g6 (0)
        • A65b - 6…g6 7.h3 (3)
        • A65c - 6…g6 7.Bf4 (0)
        • A65d - 6…g6 7.Bf4 a6 (0)
        • A65e - 6…g6 7.Bf4 a6 8.Nf3 b5 (0)
        • A65e - 6…g6 7.Bf4 a6 8.Nf3 b5 9.Qe2 (5)
        • A65f - 6…g6 7.Bd3 (0)
        • A65f - 6…g6 7.Bd3 Bg7 8.h3 (0)
        • A65g - 6…g6 7.Bd3 Bg7 8.Nge2 (0)
        • A65g - 6…g6 7.Bd3 Bg7 8.Nge2 O-O (0)
        • A65g - 6…g6 7.Bd3 Bg7 8.Nge2 O-O 9.O-O (3)
        • A65h - 6…g6 7.Bd3 Bg7 8.Nge2 O-O 9.O-O b6 (0)
        • A65i - 6…g6 7.Bd3 Bg7 8.Nge2 O-O 9.O-O Na6 (0)
        • A65j - 6…g6 7.Bd3 Bg7 8.Nge2 O-O 9.O-O a6 (2)
        • A65k - 6…g6 7.f3 - Saemisch (6.e4 (0)
        • A65k - 6…g6 7.f3 Bg7 - Saemisch (0)
        • A65l - 6…g6 7.f3 Bg7 8.Nge2 - Saemisch (9)
        • A65m - 6…g6 7.f3 Bg7 8.Be3 - Saemisch (0)
        • A65n - 6…g6 7.f3 Bg7 8.Bg5 - Saemisch (0)
        • A65n - 6…g6 7.f3 Bg7 8.Bg5 O-O - Saemisch (0)
        • A65o - 6…g6 7.f3 Bg7 8.Bg5 O-O 9.Nge2 - Saemisch (0)
        • A65p - 6…g6 7.f3 Bg7 8.Bg5 O-O 9.Qd2 - Saemisch (5)
        • A65q - 6…g6 7.f3 Bg7 8.Bg5 O-O 9.Qd2 a6 - Saemisch (3)
        • A65r - 6…g6 7.f3 Bg7 8.Bg5 h6 - Saemisch (0)
        • A65r - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O - Saemisch (0)
        • A65s - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O 10.Nge2 - Saemisch (2)
        • A65t - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O 10.Qd2 - Saemisch (0)
        • A65u - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O 10.Qd2 Re8 - Saemisch (2)
        • A65v - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O 10.Qd2 a6 - Saemisch (0)
        • A65v - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O 10.Qd2 a6 11.a4 - Saemisch (2)
        • A65w - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O 10.Qd2 a6 11.a4 h5 - Saemisch (0)
        • A65x - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O 10.Qd2 a6 11.a4 Nbd7 - Saemisch (0)
        • A65y - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O 10.Qd2 a6 11.a4 Re8 - Saemisch (0)
        • A65y - 6…g6 7.f3 Bg7 8.Bg5 h6 9.Be3 O-O 10.Qd2 a6 11.a4 Re8 12.Nge2 Nbd7 - Saemisch (5)
      • A67 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5+ - Benoni (16)
        • A67b - 8…Nbd7 - Four Pawns Taimanov (0)
        • A67c - 8…Nbd7 9.e5 dxe5 10.fxe5 Nh5 11.e6 - Four Pawns Taimanov (2)
        • A67d - 8…Nfd7 - Four Pawns Taimanov (6)
        • A67e - 8…Nfd7 9.Bd3 - Four Pawns Taimanov (1)
        • A67f - 8…Nfd7 9.Bd3 O-O - Four Pawns Taimanov (0)
        • A67g - 8…Nfd7 9.Bd3 O-O 10.Nf3 - Four Pawns Taimanov (0)
        • A67h - 8…Nfd7 9.Bd3 O-O 10.Nf3 a6 - Four Pawns Taimanov (0)
        • A67i - 8…Nfd7 9.Bd3 O-O 10.Nf3 a6 11.a4 - Four Pawns Taimanov (0)
        • A67j - 8…Nfd7 9.Bd3 O-O 10.Nf3 Na6 - Four Pawns Taimanov (2)
        • A67k - 8…Nfd7 9.a4 - Four Pawns Taimanov (Zaitsev) (0)
        • A67l - 8…Nfd7 9.a4 Qh4+ - Four Pawns Taimanov (1)
        • A67m - 8…Nfd7 9.a4 a6 - Four Pawns Taimanov (0)
        • A67n - 8…Nfd7 9.a4 a6 10.Bd3 - Four Pawns Taimanov (0)
        • A67o - 8…Nfd7 9.a4 a6 10.Be2 - Four Pawns Taimanov (0)
        • A67p - 8…Nfd7 9.a4 O-O - Four Pawns Taimanov (0)
        • A67q - 8…Nfd7 9.a4 O-O 10.Nf3 - Four Pawns Taimanov (0)
        • A67r - 8…Nfd7 9.a4 O-O 10.Nf3 Na6 - Four Pawns Taimanov (4)
        • A67s - 8…Nfd7 9.a4 O-O 10.Nf3 Na6 11.O-O Nc7 - Four Pawns Taimanov (0)
      • A68 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 - Benoni (10)
        • A68a - 8…O-O - Four Pawns (0)
        • A68b - 8…O-O 9.Bd3 - Four Pawns (0)
        • A68c - 8…O-O 9.Be2 - Four Pawns (2)
        • A68d - 8…O-O 9.Be2 b5 - Four Pawns (0)
        • A68e - 8…O-O 9.Be2 b5 10.e5 - Four Pawns (0)
        • A68f - 8…O-O 9.Be2 b5 10.e5 dxe5 - Four Pawns (0)
        • A68g - 8…O-O 9.Be2 b5 10.e5 dxe5 11.fxe5 Ng4 12.Bg5 - Four Pawns (0)
        • A68h - 8…O-O 9.Be2 Bg4 - Four Pawns (0)
        • A68i - 8…O-O 9.Be2 Bg4 10.e5 - Four Pawns (0)
        • A68j - 8…O-O 9.Be2 Bg4 10.O-O - Four Pawns (1)
        • A68k - 8…O-O 9.Be2 Bg4 10.O-O Nbd7 - Four Pawns (0)
        • A68l - 8…O-O 9.Be2 Bg4 10.O-O Nbd7 11.h3 - Four Pawns (0)
        • A68m - 8…O-O 9.Be2 Bg4 10.O-O Nbd7 11.h3 Bxf3 12.Bxf3 Re8 - Four Pawns (0)
        • A68n - 8…O-O 9.Be2 Bg4 10.O-O Nbd7 11.h3 Bxf3 12.Bxf3 Re8 13.Re1 - Four Pawns (2)
      • A69 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 O-O 9.Be2 Re8 - Benoni (5)
        • A69b - 10.O-O - Four Pawns Main Line (0)
        • A69c - 10.Nd2 - Four Pawns Main Line (0)
        • A69d - 10.Nd2 a6 - Four Pawns Main Line (0)
        • A69e - 10.Nd2 Nbd7 - Four Pawns Main Line (1)
        • A69f - 10.e5 - Four Pawns Main Line (1)
        • A69g - 10.e5 dxe5 11.fxe5 Ng4 12.O-O - Four Pawns Main Line (0)
        • A69h - 10.e5 dxe5 11.fxe5 Ng4 12.e6 - Four Pawns Main Line (3)
        • A69i - 10.e5 dxe5 11.fxe5 Ng4 12.Bg5 - Four Pawns Main Line (0)
        • A69j - 10.e5 dxe5 11.fxe5 Ng4 12.Bg5 f6 - Four Pawns Main Line (0)
        • A69k - 10.e5 dxe5 11.fxe5 Ng4 12.Bg5 Qb6 - Four Pawns Main Line (0)
        • A69l - 10.e5 dxe5 11.fxe5 Ng4 12.Bg5 Qb6 13.O-O Nxe5 14.Nxe5 - Four Pawns Main Line (0)
        • A69m - 10.e5 dxe5 11.fxe5 Ng4 12.Bg5 Qb6 13.O-O Nxe5 14.d6 - Four Pawns Main Line (0)
      • A70 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 - Benoni (122)
        • A70a - Classical (61)
        • A70b - 7…a6 - Classical (0)
        • A70b - 7…a6 8.a4 - Classical (0)
        • A70b - 7…a6 8.a4 Bg4 - Classical (4)
        • A70c - 7…a6 8.a4 Bg4 9.Be2 - Classical (2)
        • A70d - 7…Bg7 - Classical (0)
        • A70e - 7…Bg7 8.Be2 - Classical (0)
        • A70e - 7…Bg7 8.Be2 a6 - Classical (1)
        • A70f - 7…Bg7 8.Qa4+ - Classical (0)
        • A70f - 7…Bg7 8.Qa4+ Bd7 9.Qb3 Qc7 - Classical (0)
        • A70g - 7…Bg7 8.Bf4 - Classical (0)
        • A70g - 7…Bg7 8.Bf4 O-O 9.Nd2 - Classical (0)
        • A70h - 7…Bg7 8.Bd3 - Classical (0)
        • A70i - 7…Bg7 8.Bd3 O-O 9.O-O - Classical (2)
        • A70j - 7…Bg7 8.h3 - Classical (5)
        • A70k - 7…Bg7 8.h3 O-O 9.Bd3 - Classical (4)
        • A70l - 7…Bg7 8.h3 O-O 9.Bd3 Bd7 - Classical (1)
        • A70m - 7…Bg7 8.h3 O-O 9.Bd3 Na6 - Classical (0)
        • A70n - 7…Bg7 8.h3 O-O 9.Bd3 Re8 - Classical (4)
        • A70o - 7…Bg7 8.h3 O-O 9.Bd3 Re8 10.O-O c4 - Classical (1)
        • A70p - 7…Bg7 8.h3 O-O 9.Bd3 a6 - Classical (0)
        • A70q - 7…Bg7 8.h3 O-O 9.Bd3 a6 10.O-O b5 - Classical (3)
        • A70r - 7…Bg7 8.h3 O-O 9.Bd3 a6 10.a4 - Classical (3)
        • A70s - 7…Bg7 8.h3 O-O 9.Bd3 a6 10.a4 Nbd7 - Classical (8)
        • A70t - 7…Bg7 8.h3 O-O 9.Bd3 a6 10.a4 Nbd7 11.O-O Re8 - Classical (4)
        • A70u - 7…Bg7 8.h3 O-O 9.Bd3 b5 - Classical (2)
        • A70v - 7…Bg7 8.h3 O-O 9.Bd3 b5 10.Bxb5 - Classical (9)
        • A70w - 7…Bg7 8.h3 O-O 9.Bd3 b5 10.Nxb5 - Classical (2)
        • A70w - 7…Bg7 8.h3 O-O 9.Bd3 b5 10.Nxb5 Nxe4 - Classical (2)
        • A70x - 7…Bg7 8.h3 O-O 9.Bd3 b5 10.Nxb5 Re8 - Classical (0)
        • A70y - 7…Bg7 8.h3 O-O 9.Bd3 b5 10.Nxb5 Re8 11.O-O Nxe4 - Classical (4)
      • A71 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Bg5 - Benoni (2)
      • A72 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O - Benoni (3)
      • A73 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O - Benoni (7)
      • A74 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6 10.a4 - Benoni (1)
      • A75 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6 10.a4 Bg4 - Benoni (8)
      • A76 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 - Benoni (0)
      • A77 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 - Benoni (31)
      • A78 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6 - Benoni (7)
      • A79 - 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6 11.f3 - Benoni (10)
    • A80-A99 1. d4 f5 Dutch (446)
      • A80 - 1.d4 f5 - Dutch (526)
        • A80a - Dutch (81)
        • A80b - 2.g4 - Krejcik Gambit (0)
        • A80b - 2.g4 fxg4 - Krejcik Gambit Accepted (0)
        • A80c - 2.h3 - Korchnoi Attack (0)
        • A80c - 2.h3 Nf6 3.g4 - Korchnoi Janzen Gambit (2)
        • A80d - 2.Bg5 (0)
        • A80d - 2.Bg5 c6 (0)
        • A80d - 2.Bg5 d5 (4)
        • A80e - 2.Bg5 Nf6 (3)
        • A80f - 2.Bg5 h6 (8)
        • A80g - 2.Bg5 g6 (8)
        • A80h - 2.Bg5 g6 3.Nc3 (4)
        • A80i - 2.Qd3 - Alapin (0)
        • A80i - 2.Qd3 d6 3.g4 - Alapin Manhattan Gambit (1)
        • A80i - 2.Qd3 e6 3.g4 - Von Pretzel Gambit (0)
        • A80j - 2.Nc3 (0)
        • A80k - 2.Nc3 d5 (0)
        • A80k - 2.Nc3 d5 3.e4 - Euwe Gambit (5)
        • A80l - 2.Nc3 d5 3.Bg5 (4)
        • A80m - 2.Nc3 Nf6 (0)
        • A80m - 2.Nc3 Nf6 3.g4 - Spielmann Gambit (1)
        • A80n - 2.Nc3 Nf6 3.Bg5 (0)
        • A80n - 2.Nc3 Nf6 3.Bg5 e6 (0)
        • A80o - 2.Nc3 Nf6 3.Bg5 d5 (13)
        • A80p - 2.Nc3 Nf6 3.Bg5 d5 4.Bxf6 exf6 (0)
        • A80p - 2.Nc3 Nf6 3.Bg5 d5 4.Bxf6 exf6 5.e3 (0)
        • A80p - 2.Nc3 Nf6 3.Bg5 d5 4.Bxf6 exf6 5.e3 c6 (9)
        • A80q - 2.Nf3 (0)
        • A80r - 2.Nf3 e6 (4)
        • A80s - 2.Nf3 e6 3.d5 (1)
        • A80t - 2.Nf3 Nf6 (7)
        • A80u - 2.Nf3 Nf6 3.c3 - Barcza System (0)
        • A80v - 2.Nf3 Nf6 3.Bg5 (7)
      • A81 - 1.d4 f5 2.g3 - Dutch (48)
      • A82 - 1.d4 f5 2.e4 - Dutch (0)
      • A83 - 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 - Dutch (8)
        • A83a - Staunton Gambit, Staunton Variation (4)
        • A83b - 4…b6 - Staunton Gambit Nimzowitsch Variation (0)
        • A83c - 4…c6 - Staunton Gambit Chigorin Variation (0)
        • A83d - 4…g6 - Staunton Gambit (0)
        • A83e - 4…g6 5.h4 - Staunton Gambit Alekhine Variation (0)
        • A83f - 4…g6 5.f3 - Staunton Gambit Lasker Variation (1)
        • A83g - 4…e6 - Staunton Gambit (0)
        • A83h - 4…e6 5.Nxe4 - Staunton Gambit (0)
        • A83i - 4…e6 5.Nxe4 Be7 6.Bxf6 Bxf6 7.Nf3 - Staunton Gambit (2)
        • A83j - 4…Nc6 - Staunton Gambit (0)
        • A83k - 4…Nc6 5.f3 - Staunton Gambit (0)
        • A83l - 4…Nc6 5.d5 - Staunton Gambit (0)
        • A83m - 4…Nc6 5.d5 Ne5 6.Qd4 - Staunton Gambit (1)
      • A84 - 1.d4 f5 2.c4 - Dutch (1)
      • A85 - 1.d4 f5 2.c4 Nf6 3.Nc3 - Dutch (53)
      • A86 - 1.d4 f5 2.c4 Nf6 3.g3 - Dutch (0)
      • A87 - 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 - Dutch (42)
      • A88 - 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 c6 - Dutch (53)
      • A89 - 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 Nc6 - Dutch (9)
      • A90 - 1.d4 f5 2.c4 Nf6 3.g3 e6 - Dutch (2)
      • A91 - 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 - Dutch (0)
      • A92 - 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O - Dutch (7)
      • A93 - 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3 - Dutch (9)
      • A94 - 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3 c6 8.Ba3 - Dutch (1)
      • A95 - 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.Nc3 c6 - Dutch (6)
      • A96 - 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 - Dutch (6)
      • A97 - 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 - Dutch (4)
      • A98 - 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.Qc2 - Dutch (2)
      • A99 - 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.b3 - Dutch (0)
  • SÉRIE B 1.e4 2.... (12749)
    • B00 - 1.e4 - King’s Pawn (313)
      • B00a - 1…Nh6 2.d4 g6 3.c4 f6 - Hippopotamus Defence (0)
      • B00a - King’s Pawn (241)
      • B00b - 1…g5 2.d4 - Reversed Grob (Borg/Basman Defence) (0)
      • B00c - 1…a6 2.d4 - St. George Defence (0)
      • B00c - 1…a6 2.d4 h6 - Basman’s Creepy-Crawly System (as Black) (4)
      • B00d - 1…b6 - Owen Defence (2)
      • B00d - 1…b6 2.d4 - Owen Defence (0)
      • B00e - 1…b6 2.d4 e6 - Owen Defence: French (0)
      • B00f - 1…b6 2.d4 Bb7 3.Bg5 - Owen Defence: Naselwaus Gambit (5)
      • B00f - 1…b6 2.d4 Bb7 3.Nf3 - Owen Defence: Smith Gambit (0)
      • B00g - 1…b6 2.d4 Bb7 3.Bd3 - Owen Defence: (0)
      • B00g - 1…b6 2.d4 Bb7 3.Bd3 f5 - Owen Defence: Matinovsky Gambit (5)
      • B00h - 1…b6 2.d4 Bb7 3.Bd3 Nf6 - Owen Defence: (0)
      • B00i - 1…b6 2.d4 Bb7 3.Bd3 e6 - Owen Defence: (1)
      • B00j - 1…b6 2.d4 Bb7 3.Bd3 e6 4.Nf3 - Owen Defence: (7)
      • B00k - 1…b6 2.d4 Bb7 3.Bd3 e6 4.Nf3 c5 - Owen Defence: (0)
      • B00k - 1…b6 2.d4 Bb7 3.Bd3 e6 4.Nf3 c5 5.c3 - Owen Defence: (5)
      • B00l - 1…Nc6 2.b4 - Nimzowitsch Defence: Wheeler Gambit (0)
      • B00m - 1…Nc6 2.Nc3 e6 - Nimzowitsch Defence: (0)
      • B00m - 1…Nc6 2.Nc3 Nf6 - Nimzowitsch Defence: (1)
      • B00n - 1…Nc6 2.Nf3 - Nimzowitsch Defence: (1)
      • B00n - 1…Nc6 2.Nf3 f5 - Nimzowitsch Defence: Colorado Counter (7)
      • B00o - 1…Nc6 2.Nf3 d6 3.d4 - Nimzowitsch Defence: (0)
      • B00o - 1…Nc6 2.Nf3 d6 3.d4 Bg4 - Nimzowitsch Defence: (3)
      • B00p - 1…Nc6 2.Nf3 d6 3.d4 Nf6 - Nimzowitsch Defence: (6)
      • B00q - 1…Nc6 2.Nf3 d6 3.d4 Nf6 4.Nc3 - Nimzowitsch Defence: (0)
      • B00q - 1…Nc6 2.Nf3 d6 3.d4 Nf6 4.Nc3 g6 - Nimzowitsch Defence: (14)
      • B00r - 1…Nc6 2.Nf3 d6 3.d4 Nf6 4.Nc3 Bg4 5.Bb5 - Nimzowitsch Defence: (2)
      • B00r - 1…Nc6 2.Nf3 d6 3.d4 Nf6 4.Nc3 Bg4 5.Be2 - Nimzowitsch Defence: (0)
      • B00s - 1…Nc6 2.Nf3 d6 3.d4 Nf6 4.Nc3 Bg4 5.Be3 - Nimzowitsch Defence: (1)
      • B00t - 1…Nc6 2.d4 d6 3.Nc3 - Nimzowitsch Defence: (0)
      • B00u - 1…Nc6 2.d4 e5 3.dxe5 Bc5 - Nimzowitsch Defence: Bielefelder Gambit (0)
      • B00v - 1…Nc6 2.d4 d5 - Nimzowitsch Defence: (6)
      • B00v - 1…Nc6 2.d4 d5 3.exd5 Qxd5 4.Nc3 - Nimzowitsch Defence: Marshall Gambit (1)
      • B00v - 1…Nc6 2.d4 d5 3.exd5 Qxd5 4.Nf3 - Nimzowitsch Defence: (0)
      • B00w - 1…Nc6 2.d4 d5 3.Nc3 dxe4 - Nimzowitsch Defence: Bogoljubow (1)
      • B00w - 1…Nc6 2.d4 d5 3.Nc3 Nf6 - Nimzowitsch Defence: Bogoljubow (0)
      • B00x - 1…Nc6 2.d4 d5 3.e5 Bf5 4.c3 - Nimzowitsch Defence: (0)
    • B01 - 1.e4 d5 - Scandinavian (Centre Counter) (386)
      • B01a - Scandinavian (Centre Counter) (0)
      • B01b - 2.exd5 Qxd5 - Scandinavian: (26)
      • B01b - 2.exd5 Qxd5 3.d4 Nf6 - Scandinavian: (0)
      • B01b - 2.exd5 Qxd5 3.Nf3 - Scandinavian: (2)
      • B01b - 2.exd5 Qxd5 3.Nf3 Nf6 - Scandinavian: (17)
      • B01c - 2.exd5 Qxd5 3.Nc3 Qd8 - Scandinavian: (31)
      • B01d - 2.exd5 Qxd5 3.Nc3 Qd6 - Scandinavian: Schiller Defence (60)
      • B01d - 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 Nf6 - Scandinavian: Schiller (3)
      • B01d - 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 Nf6 5.Nf3 a6 - Scandinavian: Schiller Bronstein Variation (58)
      • B01e - 2.exd5 Qxd5 3.Nc3 Qa5 - Scandinavian: (11)
      • B01e - 2.exd5 Qxd5 3.Nc3 Qa5 4.Bc4 - Scandinavian: (0)
      • B01e - 2.exd5 Qxd5 3.Nc3 Qa5 4.Bc4 Nf6 - Scandinavian: (8)
      • B01f - 2.exd5 Qxd5 3.Nc3 Qa5 4.Nf3 - Scandinavian: (1)
      • B01f - 2.exd5 Qxd5 3.Nc3 Qa5 4.Nf3 Nf6 - Scandinavian: (0)
      • B01f - 2.exd5 Qxd5 3.Nc3 Qa5 4.Nf3 Nf6 5.Be2 - Scandinavian: (1)
      • B01g - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 - Scandinavian: (3)
      • B01g - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 5.Nf3 Bg4 - Scandinavian: Anderssen Counterattack Collijn Variation (0)
      • B01h - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 c6 - Scandinavian: (5)
      • B01h - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 c6 5.Bc4 - Scandinavian: (5)
      • B01h - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 c6 5.Nf3 - Scandinavian: (0)
      • B01i - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 - Scandinavian: (15)
      • B01i - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Bc4 - Scandinavian: (1)
      • B01i - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Bc4 c6 - Scandinavian: (0)
      • B01i - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Bd2 c6 - Scandinavian: (13)
      • B01j - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 - Scandinavian: (1)
      • B01j - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bg4 - Scandinavian: (0)
      • B01k - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bg4 6.h3 - Scandinavian: Lasker Variation (3)
      • B01l - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bf5 - Scandinavian: (21)
      • B01l - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bf5 6.Bc4 - Scandinavian: (0)
      • B01l - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bf5 6.Ne5 c6 7.g4 - Scandinavian: Gruenfeld Variation (21)
      • B01m - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 - Scandinavian: Main Line (7)
      • B01n - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 6.Bc4 - Scandinavian: Main Line (2)
      • B01n - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 6.Bc4 Bg4 - Scandinavian: Main Line (2)
      • B01o - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 6.Bc4 Bf5 - Scandinavian: Main Line (4)
      • B01p - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 6.Bc4 Bf5 7.Bd2 - Scandinavian: Main Line (10)
      • B01p - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 6.Bc4 Bf5 7.Bd2 e6 - Scandinavian: Main Line (0)
      • B01p - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 6.Bc4 Bf5 7.Bd2 e6 8.Nd5 - Scandinavian: Main Line (10)
      • B01q - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 6.Bc4 Bf5 7.Bd2 e6 8.Qe2 - Scandinavian: Main Line (1)
      • B01q - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 6.Bc4 Bf5 7.Bd2 e6 8.Qe2 Bb4 9.a3 - Scandinavian: Main Line (0)
      • B01q - 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 c6 6.Bc4 Bf5 7.Bd2 e6 8.Qe2 Bb4 9.O-O-O - Scandinavian: Main Line (1)
      • B01r - 2.exd5 Nf6 - Scandinavian: (3)
      • B01r - 2.exd5 Nf6 3.Bc4 - Scandinavian: (0)
      • B01r - 2.exd5 Nf6 3.Nf3 Nxd5 - Scandinavian: (1)
      • B01s - 2.exd5 Nf6 3.Bb5+ - Scandinavian: (2)
      • B01s - 2.exd5 Nf6 3.Bb5+ Bd7 4.Bc4 Bg4 - Scandinavian: (0)
      • B01s - 2.exd5 Nf6 3.Bb5+ Bd7 4.Be2 Nxd5 5.d4 Bf5 - Scandinavian: (2)
      • B01t - 2.exd5 Nf6 3.c4 - Scandinavian: (1)
      • B01t - 2.exd5 Nf6 3.c4 e6 4.dxe6 Bxe6 5.d4 - Scandinavian: Icelandic Gambit (0)
      • B01t - 2.exd5 Nf6 3.c4 e6 4.dxe6 Bxe6 5.Nf3 - Scandinavian: Icelandic Gambit (1)
      • B01u - 2.exd5 Nf6 3.d4 - Scandinavian: (5)
      • B01u - 2.exd5 Nf6 3.d4 Bg4 4.Nf3 Qxd5 5.Be2 - Scandinavian: Portuguese (0)
      • B01u - 2.exd5 Nf6 3.d4 Bg4 4.Nf3 Qxd5 5.Be2 Nc6 - Scandinavian: Portuguese (5)
      • B01v - 2.exd5 Nf6 3.d4 Bg4 4.f3 - Scandinavian: Portuguese (1)
      • B01v - 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.Bb5+ Nbd7 - Scandinavian: Portuguese (0)
      • B01v - 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.Bb5+ Nbd7 6.c4 - Scandinavian: Portuguese (1)
      • B01w - 2.exd5 Nf6 3.d4 Nxd5 - Scandinavian: Marshall Variation (9)
      • B01w - 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 Bg4 5.Be2 - Scandinavian: Marshall (0)
      • B01w - 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 Bg4 5.Be2 e6 - Scandinavian: Marshall (8)
      • B01x - 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 g6 5.Be2 Bg7 - Scandinavian: Marshall (0)
      • B01y - 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb6 5.Nc3 e5 - Scandinavian: Marshall (0)
      • B01z - 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb6 5.Nf3 - Scandinavian: Marshall (2)
      • B01z - 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb6 5.Nf3 Bg4 6.Be2 e6 - Scandinavian: Marshall (2)
      • B01z - 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb6 5.Nf3 g6 6.Be2 Bg7 - Scandinavian: Marshall (0)
    • B02-B05 - 1.e4 Nf6 - Alekhine (141)
      • B02 - 1.e4 Nf6 - Alekhine Defence (13)
        • B02a - 2.Bc4 - Krejcik Variation (0)
        • B02a - Alekhine Defence (0)
        • B02b - 2.d3 - Maroczy Variation (3)
        • B02c - 2.Nc3 - Scandinavian Variation (0)
        • B02c - 2.Nc3 d5 - Scandinavian Variation (5)
        • B02d - 2.Nc3 d5 3.e5 - Scandinavian (0)
        • B02e - 2.Nc3 d5 3.e5 Ne4 - Scandinavian (0)
        • B02f - 2.Nc3 d5 3.e5 Nfd7 - Scandinavian (0)
        • B02f - 2.Nc3 d5 3.e5 Nfd7 4.e6 - Spielmann Gambit (0)
        • B02g - 2.Nc3 d5 3.exd5 c6 - Scandinavian Geschev Gambit (0)
        • B02g - 2.Nc3 d5 3.exd5 Nxd5 4.Nf3 - Scandinavian Exchange (0)
        • B02h - 2.Nc3 d5 3.exd5 Nxd5 4.Nxd5 Qxd5 - Scandinavian Exchange (0)
        • B02i - 2.Nc3 d5 3.exd5 Nxd5 4.Bc4 - Scandinavian Exchange (0)
        • B02j - 2.Nc3 d5 3.exd5 Nxd5 4.Bc4 e6 - Scandinavian Exchange (0)
        • B02k - 2.Nc3 d5 3.exd5 Nxd5 4.Bc4 Nb6 - Scandinavian Exchange (0)
        • B02l - 2.e5 (0)
        • B02l - 2.e5 Ne4 - Mokele Mbembe (Buecker) Variation (0)
        • B02l - 2.e5 Ng8 - Brooklyn Defence (Retreat Variation) (2)
        • B02m - 2.e5 Nd5 (2)
        • B02m - 2.e5 Nd5 3.b3 - Welling Variation (0)
        • B02n - 2.e5 Nd5 3.Bc4 (0)
        • B02n - 2.e5 Nd5 3.Bc4 Nb6 4.Bb3 c5 5.d3 - Kmoch Variation (0)
        • B02o - 2.e5 Nd5 3.Nc3 - Saemisch Attack (1)
        • B02p - 2.e5 Nd5 3.Nc3 Nxc3 - Saemisch Attack (0)
        • B02q - 2.e5 Nd5 3.Nc3 Nxc3 4.dxc3 - Saemisch Attack (0)
        • B02r - 2.e5 Nd5 3.c4 - Chase Variation (0)
        • B02r - 2.e5 Nd5 3.c4 Nb6 - Chase Variation (0)
        • B02r - 2.e5 Nd5 3.c4 Nb6 4.b3 - Chase Steiner Variation (0)
        • B02s - 2.e5 Nd5 3.c4 Nb6 4.c5 - Two Pawns (Lasker) Attack (0)
        • B02t - 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Nc3 - Two Pawns Attack (0)
        • B02u - 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 - Two Pawns Attack (0)
        • B02u - 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 e6 6.Nc3 d6 - Two Pawns Attack Mikenas Variation (0)
      • B03 - 1.e4 Nf6 2.e5 Nd5 3.d4 - Alekhine (114)
        • B03a - 3…b5 - O’Sullivan Gambit (3)
        • B03a - 3.d4 (0)
        • B03b - 3…d6 (72)
        • B03c - 3…d6 4.exd6 (1)
        • B03d - 3…d6 4.Bc4 - Balogh Variation (1)
        • B03e - 3…d6 4.c4 (0)
        • B03e - 3…d6 4.c4 Nb6 (0)
        • B03f - 3…d6 4.c4 Nb6 5.Nf3 (0)
        • B03g - 3…d6 4.c4 Nb6 5.f4 - Four Pawns Attack (3)
        • B03g - 3…d6 4.c4 Nb6 5.f4 g5 - Four Pawns Attack Planinc Variation (0)
        • B03h - 3…d6 4.c4 Nb6 5.f4 Bf5 - Four Pawns Attack Trifunovic Variation (3)
        • B03i - 3…d6 4.c4 Nb6 5.f4 g6 - Four Pawns Attack Fianchetto Variation (3)
        • B03j - 3…d6 4.c4 Nb6 5.f4 dxe5 - Four Pawns Attack (3)
        • B03j - 3…d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 - Four Pawns Attack (1)
        • B03k - 3…d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 c5 - Four Pawns Attack (0)
        • B03l - 3…d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Bf5 - Four Pawns Attack (1)
        • B03l - 3…d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Bf5 7.Nc3 e6 8.Nf3 Bb4 9.Bd3 - Four Pawns Attack Fahrni Variation (0)
        • B03l - 3…d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Bf5 7.Nc3 e6 8.Nf3 Be7 9.Be2 O-O 10.O-O f6 - Four Pawns Attack Korchnoi Variation (1)
        • B03m - 3…d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Nc6 - Four Pawns Attack (0)
        • B03m - 3…d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Nc6 7.Nf3 Bg4 8.e6 fxe6 9.c5 - Four Pawns Attack Ilyin-Zhenevsky Variation (0)
        • B03n - 3…d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Nc6 7.Be3 - Four Pawns Attack (4)
        • B03o - 3…d6 4.c4 Nb6 5.exd6 - Exchange Variation (0)
        • B03o - 3…d6 4.c4 Nb6 5.exd6 exd6 - Exchange (5)
        • B03p - 3…d6 4.c4 Nb6 5.exd6 exd6 6.Nc3 - Exchange (1)
        • B03q - 3…d6 4.c4 Nb6 5.exd6 exd6 6.Nc3 Be7 - Exchange (9)
        • B03r - 3…d6 4.c4 Nb6 5.exd6 cxd6 - Exchange (0)
        • B03s - 3…d6 4.c4 Nb6 5.exd6 cxd6 6.Nc3 - Exchange (0)
        • B03t - 3…d6 4.c4 Nb6 5.exd6 cxd6 6.Nc3 g6 7.Be3 - Exchange (3)
      • B04 - 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 - Alekhine (72)
        • B04a - Modern Variation (0)
        • B04b - 4…Nc6 - Modern (1)
        • B04c - 4…c6 - Modern (1)
        • B04d - 4…c6 5.c4 - Modern (2)
        • B04e - 4…Nb6 - Modern Schmid Variation (4)
        • B04f - 4…dxe5 - Modern Larsen Variation (48)
        • B04g - 4…dxe5 5.Nxe5 g6 - Modern Larsen (0)
        • B04h - 4…dxe5 5.Nxe5 g6 6.Bc4 - Modern Larsen (0)
        • B04i - 4…dxe5 5.Nxe5 g6 6.Bc4 c6 7.O-O - Modern Larsen (6)
        • B04j - 4…g6 - Modern Fianchetto Variation (1)
        • B04k - 4…g6 5.Bc4 - Modern Fianchetto (3)
        • B04l - 4…g6 5.Bc4 Nb6 - Modern Fianchetto (0)
        • B04m - 4…g6 5.Bc4 Nb6 6.Bb3 Bg7 - Modern Fianchetto (4)
        • B04n - 4…g6 5.Bc4 Nb6 6.Bb3 Bg7 7.a4 - Modern Fianchetto Keres Variation (0)
        • B04o - 4…g6 5.Bc4 Nb6 6.Bb3 Bg7 7.Ng5 - Modern Fianchetto (2)
      • B05 - 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 - Alekhine (44)
        • B05a - Modern, 4…Bg4 (0)
        • B05b - 5.h3 - Modern Panov Variation (0)
        • B05c - 5.c4 - Modern Alekhine Variation (22)
        • B05c - 5.c4 Nb6 - Modern Alekhine Variation (0)
        • B05d - 5.c4 Nb6 6.exd6 - Modern Alekhine Variation (0)
        • B05d - 5.c4 Nb6 6.exd6 cxd6 - Modern Alekhine Variation (0)
        • B05e - 5.c4 Nb6 6.exd6 exd6 - Modern Alekhine Variation (0)
        • B05f - 5.Be2 - Modern (0)
        • B05g - 5.Be2 Nc6 - Modern (0)
        • B05h - 5.Be2 c6 - Modern Flohr Variation (1)
        • B05i - 5.Be2 c6 6.c4 - Modern Flohr (1)
        • B05j - 5.Be2 c6 6.O-O - Modern Flohr (0)
        • B05k - 5.Be2 e6 - Modern (6)
        • B05l - 5.Be2 e6 6.O-O - Modern (0)
        • B05m - 5.Be2 e6 6.O-O Be7 7.c4 - Modern Main Line (2)
        • B05n - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.h3 - Modern Main Line (0)
        • B05n - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.h3 Bh5 - Modern Main Line (1)
        • B05o - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.h3 Bh5 9.Nc3 - Modern Main Line (0)
        • B05o - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.h3 Bh5 9.Nc3 O-O - Modern Main Line (0)
        • B05o - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.h3 Bh5 9.Nc3 O-O 10.Be3 - Modern Main Line (1)
        • B05p - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.h3 Bh5 9.Nc3 O-O 10.Be3 d5 - Modern Main Line (3)
        • B05q - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.exd6 - Modern Main Line (2)
        • B05r - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.Nc3 - Modern Main Line (1)
        • B05s - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.Nc3 O-O 9.Be3 - Modern Main Line (3)
        • B05t - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.Nc3 O-O 9.Be3 Nc6 - Modern Main Line (1)
        • B05u - 5.Be2 e6 6.O-O Be7 7.c4 Nb6 8.Nc3 O-O 9.Be3 Nc6 10.exd6 cxd6 - Modern Main Line (0)
    • B06 - 1.e4 g6 - Modern (613)
      • B06a - Modern (4)
      • B06b - 2.Nc3 - Modern (6)
      • B06b - 2.Nc3 Bg7 - Modern (6)
      • B06b - 2.Nc3 d6 - Modern (1)
      • B06c - 2.f4 - Modern (0)
      • B06c - 2.f4 Bg7 3.Nf3 - Modern (0)
      • B06c - 2.f4 Bg7 3.Nf3 d6 - Modern (0)
      • B06c - 2.f4 d6 - Modern (0)
      • B06c - 2.Nc3 Bg7 3.f4 d6 - Modern (5)
      • B06d - 2.d4 - Modern (18)
      • B06d - 2.d4 c6 - Modern (0)
      • B06d - 2.d4 Nf6 - Norwegian Defence (0)
      • B06d - 2.d4 Nf6 3.e5 Nh5 4.g4 Ng7 - Norwegian Defence (18)
      • B06e - 2.d4 d6 - Modern (24)
      • B06f - 2.d4 Bg7 - Modern (8)
      • B06f - 2.d4 Bg7 3.Bc4 (8)
      • B06g - 2.d4 Bg7 3.c3 (10)
      • B06g - 2.d4 Bg7 3.c3 d6 (0)
      • B06g - 2.d4 Bg7 3.c3 d6 4.f4 c5 - Pterodactyl (10)
      • B06h - 2.d4 Bg7 3.c3 d6 4.Nf3 - Geller System (4)
      • B06i - 2.d4 Bg7 3.Nf3 (7)
      • B06j - 2.d4 Bg7 3.Nf3 d6 (43)
      • B06k - 2.d4 Bg7 3.Nf3 d6 4.Bc4 (53)
      • B06l - 2.d4 Bg7 3.Nc3 (59)
      • B06l - 2.d4 Bg7 3.Nc3 c5 - Pterodactyl (0)
      • B06l - 2.d4 Bg7 3.Nc3 d5 - Mittenberger Gambit (59)
      • B06m - 2.d4 Bg7 3.Nc3 d6 (30)
      • B06n - 2.d4 Bg7 3.Nc3 d6 4.Bc4 (6)
      • B06n - 2.d4 Bg7 3.Nc3 d6 4.Bc4 c6 (0)
      • B06n - 2.d4 Bg7 3.Nc3 d6 4.Bc4 c6 5.Qf3 (0)
      • B06n - 2.d4 Bg7 3.Nc3 d6 4.Bc4 c6 5.Qf3 e6 (0)
      • B06n - 2.d4 Bg7 3.Nc3 d6 4.Bc4 c6 5.Qf3 Nf6 (5)
      • B06o - 2.d4 Bg7 3.Nc3 d6 4.Be3 (8)
      • B06p - 2.d4 Bg7 3.Nc3 d6 4.Be3 a6 (82)
      • B06q - 2.d4 Bg7 3.Nc3 d6 4.Be3 c6 (20)
      • B06r - 2.d4 Bg7 3.Nc3 d6 4.Nf3 - Two Knights Variation (34)
      • B06r - 2.d4 Bg7 3.Nc3 d6 4.Nf3 c6 - Two Knights Suttles Variation (0)
      • B06r - 2.d4 Bg7 3.Nc3 d6 4.Nf3 c6 5.Bg5 Qb6 6.Qd2 - Two Knights Suttles Tal Gambit (34)
      • B06s - 2.d4 Bg7 3.Nc3 d6 4.f4 - Pseudo-Austrian Attack (19)
      • B06s - 2.d4 Bg7 3.Nc3 d6 4.f4 c6 - Pseudo-Austrian Attack (19)
      • B06t - 2.d4 Bg7 3.Nc3 d6 4.f4 c6 5.Nf3 - Pseudo-Austrian Attack (12)
      • B06t - 2.d4 Bg7 3.Nc3 d6 4.f4 Nc6 - Pseudo-Austrian Attack (0)
      • B06u - 2.d4 Bg7 3.f4 - Three Pawns Attack (1)
    • B07-B09 - 1.e4 d6 - Pirc (649)
      • B07 - 1.e4 d6 - Pirc (856)
        • B07a - 2.g3 - Pirc (2)
        • B07a - 2.Nc3 Nf6 (0)
        • B07b - 2.Nf3 Nf6 3.Nc3 (3)
        • B07c - 2.f4 Nf6 3.Nc3 g6 4.Nf3 Bg7 (0)
        • B07d - 2.d4 c6 (0)
        • B07d - 2.d4 Nf6 (154)
        • B07d - 2.d4 Nf6 3.Nbd2 g6 4.c3 Bg7 (0)
        • B07e - 2.d4 Nf6 3.f3 (0)
        • B07f - 2.d4 Nf6 3.f3 e5 4.d5 (8)
        • B07f - 2.d4 Nf6 3.f3 e5 4.dxe5 dxe5 5.Qxd8+ - Queenswap (8)
        • B07g - 2.d4 Nf6 3.f3 g6 (0)
        • B07h - 2.d4 Nf6 3.Bd3 (22)
        • B07h - 2.d4 Nf6 3.Bd3 e5 4.c3 d5 (0)
        • B07h - 2.d4 Nf6 3.Bd3 e5 4.c3 d5 5.dxe5 dxe4 (21)
        • B07h - 2.d4 Nf6 3.Bd3 e5 4.c3 d5 5.dxe5 Nxe4 (0)
        • B07i - 2.d4 Nf6 3.Bd3 g6 4.Nf3 (15)
        • B07i - 2.d4 Nf6 3.Bd3 g6 4.Nf3 Bg7 (2)
        • B07j - 2.d4 Nf6 3.Bd3 g6 4.Nf3 Bg7 5.c3 (34)
        • B07k - 2.d4 Nf6 3.Nc3 (478)
        • B07l - 2.d4 Nf6 3.Nc3 Nbd7 (0)
        • B07m - 2.d4 Nf6 3.Nc3 e5 (2)
        • B07m - 2.d4 Nf6 3.Nc3 e5 4.dxe5 dxe5 5.Qxd8+ - Queenswap (0)
        • B07n - 2.d4 Nf6 3.Nc3 c6 - Pytel/Czech (0)
        • B07o - 2.d4 Nf6 3.Nc3 c6 4.Nf3 - Czech (0)
        • B07p - 2.d4 Nf6 3.Nc3 c6 4.f4 Qa5 - Czech (0)
        • B07q - 2.d4 Nf6 3.Nc3 g6 4.Nge2 Bg7 (0)
        • B07r - 2.d4 Nf6 3.Nc3 g6 4.g3 Bg7 - Sveshnikov (4.g3) (24)
        • B07r - 2.d4 Nf6 3.Nc3 g6 4.g3 Bg7 5.Bg2 c6 - Sveshnikov (4.g3) (24)
        • B07s - 2.d4 Nf6 3.Nc3 g6 4.Bc4 Bg7 - Holmov (4.Bc4) (0)
        • B07t - 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 (13)
        • B07u - 2.d4 Nf6 3.Nc3 g6 4.Be3 Bg7 (8)
        • B07u - 2.d4 Nf6 3.Nc3 g6 4.Be3 Bg7 5.Qd2 - 150 Attack (8)
        • B07v - 2.d4 Nf6 3.Nc3 g6 4.Be3 Bg7 5.Qd2 c6 - 150 Attack (12)
        • B07v - 2.d4 Nf6 3.Nc3 g6 4.Be3 Bg7 5.Qd2 c6 6.f3 b5 - 150 Attack (12)
        • B07w - 2.d4 Nf6 3.Nc3 g6 4.Bg5 - Byrne (0)
        • B07x - 2.d4 Nf6 3.Nc3 g6 4.Bg5 Bg7 (0)
        • B07y - 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 (0)
        • B07y - 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.g4 - Chinese Variation (0)
        • B07z - 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.h4 - Bayonet/Mariotti Attack (6)
      • B08 - 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 - Pirc (235)
        • B08a - 4…Bg7 - Classical (13)
        • B08a - Classical (0)
        • B08b - 4…Bg7 5.h3 - Classical (0)
        • B08b - 4…Bg7 5.h3 c6 - Classical (0)
        • B08b - 4…Bg7 5.h3 O-O - Classical (14)
        • B08c - 4…Bg7 5.h3 O-O 6.Be3 - Classical Spassky System (0)
        • B08c - 4…Bg7 5.h3 O-O 6.Be3 d5 - Classical Spassky System (5)
        • B08d - 4…Bg7 5.h3 O-O 6.Be3 a6 - Classical Spassky System (7)
        • B08e - 4…Bg7 5.h3 O-O 6.Be3 c6 - Classical Spassky System (8)
        • B08f - 4…Bg7 5.a4 - Classical (0)
        • B08f - 4…Bg7 5.a4 c6 - Classical (4)
        • B08g - 4…Bg7 5.Bc4 - Classical (1)
        • B08g - 4…Bg7 5.Bc4 c6 - Classical (7)
        • B08h - 4…Bg7 5.Be3 - Classical (0)
        • B08h - 4…Bg7 5.Be3 a6 6.a4 - Classical (18)
        • B08i - 4…Bg7 5.Be3 c6 - Classical (17)
        • B08j - 4…Bg7 5.Be2 - Classical (3)
        • B08j - 4…Bg7 5.Be2 a6 6.a4 - Classical (3)
        • B08k - 4…Bg7 5.Be2 c6 - Classical (0)
        • B08l - 4…Bg7 5.Be2 O-O - Classical (3)
        • B08m - 4…Bg7 5.Be2 O-O 6.Be3 - Classical (1)
        • B08n - 4…Bg7 5.Be2 O-O 6.O-O - Classical (30)
        • B08o - 4…Bg7 5.Be2 O-O 6.O-O Nc6 - Classical (15)
        • B08p - 4…Bg7 5.Be2 O-O 6.O-O c6 - Classical (18)
        • B08q - 4…Bg7 5.Be2 O-O 6.O-O c6 7.h3 - Classical (10)
        • B08r - 4…Bg7 5.Be2 O-O 6.O-O c6 7.a4 - Classical (13)
        • B08s - 4…Bg7 5.Be2 O-O 6.O-O c6 7.a4 Nbd7 - Classical (11)
        • B08t - 4…Bg7 5.Be2 O-O 6.O-O Bg4 - Classical (18)
        • B08u - 4…Bg7 5.Be2 O-O 6.O-O Bg4 7.Be3 Nc6 8.Qd2 - Classical (4)
        • B08v - 4…Bg7 5.Be2 O-O 6.O-O Bg4 7.Be3 Nc6 8.Qd2 e5 - Classical (12)
      • B09 - 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 - Pirc (120)
        • B09a - Austrian Attack (0)
        • B09b - 4…Bg7 - Austrian Attack (10)
        • B09c - 4…Bg7 5.Bc4 - Austrian Ljubojevic Variation (0)
        • B09d - 4…Bg7 5.Nf3 - Austrian (2)
        • B09e - 4…Bg7 5.Nf3 O-O - Austrian (4)
        • B09f - 4…Bg7 5.Nf3 O-O 6.e5 - Austrian (10)
        • B09g - 4…Bg7 5.Nf3 O-O 6.Be3 - Austrian (13)
        • B09h - 4…Bg7 5.Nf3 O-O 6.Be2 - Austrian (2)
        • B09i - 4…Bg7 5.Nf3 O-O 6.Bd3 - Austrian (7)
        • B09j - 4…Bg7 5.Nf3 O-O 6.Bd3 Nc6 - Austrian (6)
        • B09k - 4…Bg7 5.Nf3 O-O 6.Bd3 Nc6 7.e5 - Austrian (11)
        • B09l - 4…Bg7 5.Nf3 O-O 6.Bd3 Na6 - Austrian (2)
        • B09m - 4…Bg7 5.Nf3 O-O 6.Bd3 Na6 7.O-O c5 - Austrian (0)
        • B09m - 4…Bg7 5.Nf3 O-O 6.Bd3 Na6 7.O-O c5 8.d5 - Austrian (9)
        • B09n - 4…Bg7 5.Nf3 O-O 6.Bd3 Na6 7.O-O c5 8.d5 Bg4 - Austrian (8)
        • B09o - 4…Bg7 5.Nf3 c5 - Austrian (2)
        • B09p - 4…Bg7 5.Nf3 c5 6.dxc5 - Austrian (0)
        • B09q - 4…Bg7 5.Nf3 c5 6.dxc5 Qa5 7.Bd3 - Austrian (12)
        • B09r - 4…Bg7 5.Nf3 c5 6.Bb5+ - Austrian (0)
        • B09s - 4…Bg7 5.Nf3 c5 6.Bb5+ Bd7 - Austrian (9)
        • B09t - 4…Bg7 5.Nf3 c5 6.Bb5+ Bd7 7.e5 - Austrian (0)
        • B09u - 4…Bg7 5.Nf3 c5 6.Bb5+ Bd7 7.e5 Ng4 - Austrian (0)
        • B09v - 4…Bg7 5.Nf3 c5 6.Bb5+ Bd7 7.e5 Ng4 8.Bxd7+ - Austrian (2)
        • B09w - 4…Bg7 5.Nf3 c5 6.Bb5+ Bd7 7.e5 Ng4 8.e6 - Austrian (4)
        • B09w - 4…Bg7 5.Nf3 c5 6.Bb5+ Bd7 7.e5 Ng4 8.e6 fxe6 - Austrian Seirawan Variation (7)
        • B09x - 4…Bg7 5.Nf3 c5 6.Bb5+ Bd7 7.e5 Ng4 8.e6 Bxb5 - Austrian (0)
    • B10 - B19 1. e4 c6 Caro-Kann defence (2082)
      • B10 - 1.e4 c6 - Caro-Kann (1462)
        • B10a - 2.f4 (0)
        • B10a - 2.Ne2 (8)
        • B10a - Caro-Kann (1152)
        • B10b - 2.d3 - Breyer Variation (0)
        • B10b - 2.d3 d5 - Breyer Variation (16)
        • B10c - 2.d3 d5 3.Nd2 - Breyer (5)
        • B10d - 2.d3 d5 3.Nd2 g6 - Breyer (18)
        • B10e - 2.d3 d5 3.Nd2 e5 - Breyer (19)
        • B10f - 2.d3 d5 3.Nd2 e5 4.Ngf3 Bd6 5.g3 - Breyer Main Line (10)
        • B10g - 2.c4 - English Variation (0)
        • B10h - 2.c4 e5 - English Variation (4)
        • B10i - 2.c4 d5 - English Variation (0)
        • B10i - 2.c4 d5 3.cxd5 - English Variation (0)
        • B10i - 2.c4 d5 3.cxd5 cxd5 - English Variation (1)
        • B10i - 2.c4 d5 3.exd5 - English Variation (0)
        • B10i - 2.c4 d5 3.exd5 cxd5 - English Variation (0)
        • B10j - 2.c4 d5 3.exd5 cxd5 4.cxd5 - English Exchange (1)
        • B10k - 2.c4 d5 3.exd5 cxd5 4.cxd5 Nf6 - English Exchange (10)
        • B10l - 2.c4 d5 3.exd5 cxd5 4.cxd5 Nf6 5.Bb5+ - English Exchange (7)
        • B10m - 2.c4 d5 3.exd5 cxd5 4.cxd5 Nf6 5.Nc3 - English Exchange (4)
        • B10n - 2.c4 d5 3.exd5 cxd5 4.cxd5 Nf6 5.Nc3 Nxd5 - English Exchange (19)
        • B10o - 2.Nf3 (96)
        • B10p - 2.Nc3 (0)
        • B10q - 2.Nc3 d5 (8)
        • B10r - 2.Nc3 d5 3.Qf3 - Goldman/Spielmann (5)
        • B10s - 2.Nc3 d5 3.Nf3 - Two Knights Variation (25)
        • B10t - 2.Nc3 d5 3.Nf3 dxe4 - Two Knights (0)
        • B10t - 2.Nc3 d5 3.Nf3 dxe4 4.Ng5 - Hector Gambit (0)
        • B10u - 2.Nc3 d5 3.Nf3 dxe4 4.Nxe4 - Two Knights (1)
        • B10v - 2.Nc3 d5 3.Nf3 dxe4 4.Nxe4 Nf6 - Two Knights (53)
      • B11 - 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 - Caro-Kann (122)
        • B11a - Two Knights, 3…Bg4 (0)
        • B11b - 4.h3 - Two Knights (0)
        • B11b - 4.h3 Bh5 - Two Knights (5)
        • B11c - 4.h3 Bh5 5.exd5 cxd5 6.Bb5+ Nc6 7.g4 Bg6 - Two Knights (5)
        • B11d - 4.h3 Bxf3 - Two Knights (0)
        • B11d - 4.h3 Bxf3 5.Qxf3 - Two Knights (3)
        • B11e - 4.h3 Bxf3 5.Qxf3 dxe4 - Two Knights (0)
        • B11e - 4.h3 Bxf3 5.Qxf3 dxe4 6.Nxe4 - Two Knights (0)
        • B11f - 4.h3 Bxf3 5.Qxf3 Nf6 - Two Knights (13)
        • B11g - 4.h3 Bxf3 5.Qxf3 e6 - Two Knights (35)
        • B11h - 4.h3 Bxf3 5.Qxf3 e6 6.d4 - Two Knights (26)
        • B11i - 4.h3 Bxf3 5.Qxf3 e6 6.g3 - Two Knights (0)
        • B11i - 4.h3 Bxf3 5.Qxf3 e6 6.g3 Nf6 - Two Knights (14)
        • B11j - 4.h3 Bxf3 5.Qxf3 e6 6.d3 - Two Knights (1)
        • B11k - 4.h3 Bxf3 5.Qxf3 e6 6.d3 Nd7 - Two Knights (5)
        • B11l - 4.h3 Bxf3 5.Qxf3 e6 6.d3 Nf6 - Two Knights (4)
        • B11m - 4.h3 Bxf3 5.Qxf3 e6 6.d3 Nf6 7.a3 - Two Knights (7)
        • B11n - 4.h3 Bxf3 5.Qxf3 e6 6.d3 Nf6 7.Bd2 - Two Knights (4)
      • B12 - 1.e4 c6 2.d4 - Caro-Kann (823)
        • B12a - 2…Na6 - de Bruycker Defence (0)
        • B12a - 2…Nf6 - Masi Defence (0)
        • B12a - 2.d4 (0)
        • B12b - 2…d5 (0)
        • B12b - 2…d5 3.Nf3 - Ulysses Gambit (0)
        • B12b - 2…d5 3.Nf3 dxe4 4.Ng5 - Ulysses Gambit (0)
        • B12c - 2…d5 3.Be3 - Mieses Gambit (0)
        • B12d - 2…d5 3.f3 - Maroczy (Fantasy) Variation (13)
        • B12e - 2…d5 3.f3 e6 - Maroczy (Fantasy) (11)
        • B12f - 2…d5 3.f3 dxe4 - Maroczy (Fantasy) (0)
        • B12f - 2…d5 3.f3 dxe4 4.fxe4 e5 5.Nf3 exd4 6.Bc4 - Maroczy (Fantasy) Gambit line (6)
        • B12g - 2…d5 3.Nd2 (0)
        • B12g - 2…d5 3.Nd2 dxe4 (2)
        • B12g - 2…d5 3.Nd2 Qb6 - Edinburgh Variation (0)
        • B12h - 2…d5 3.Nd2 g6 - Gurgenidze/Modern: (0)
        • B12h - 2…d5 3.Nd2 g6 4.Ngf3 - Gurgenidze/Modern: (0)
        • B12h - 2…d5 3.Nd2 g6 4.Ngf3 Bg7 - Gurgenidze/Modern: (0)
        • B12h - 2…d5 3.Nd2 g6 4.Ngf3 Bg7 5.c3 - Gurgenidze/Modern: (0)
        • B12h - 2…d5 3.Nd2 g6 4.Ngf3 Bg7 5.h3 - Gurgenidze/Modern: (4)
        • B12i - 2…d5 3.e5 - Advance Variation (1)
        • B12j - 2…d5 3.e5 c5 - Advance (7)
        • B12j - 2…d5 3.e5 c5 4.dxc5 - Advance (65)
        • B12k - 2…d5 3.e5 c5 4.dxc5 Nc6 - Advance (14)
        • B12l - 2…d5 3.e5 Bf5 - Advance (87)
        • B12l - 2…d5 3.e5 Bf5 4.g4 - Advance Bayonet Variation (87)
        • B12m - 2…d5 3.e5 Bf5 4.h4 - Advance (90)
        • B12n - 2…d5 3.e5 Bf5 4.c3 - Advance (0)
        • B12n - 2…d5 3.e5 Bf5 4.c3 e6 5.Be2 - Advance Short Variation (11)
        • B12o - 2…d5 3.e5 Bf5 4.Bd3 - Advance (6)
        • B12p - 2…d5 3.e5 Bf5 4.Nf3 - Advance (14)
        • B12p - 2…d5 3.e5 Bf5 4.Nf3 e6 - Advance (14)
        • B12q - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 - Advance (133)
        • B12r - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 Nd7 - Advance (76)
        • B12s - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 c5 - Advance (4)
        • B12t - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 c5 6.O-O - Advance (0)
        • B12t - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 c5 6.O-O Nd7 - Advance (0)
        • B12t - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 c5 6.O-O Ne7 - Advance (56)
        • B12u - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 c5 6.Be3 - Advance (0)
        • B12u - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 c5 6.Be3 Nd7 - Advance (0)
        • B12u - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 c5 6.Be3 Nd7 7.O-O - Advance (50)
        • B12u - 2…d5 3.e5 Bf5 4.Nf3 e6 5.Be2 c5 6.Be3 Ne7 - Advance (0)
        • B12v - 2…d5 3.e5 Bf5 4.Nc3 - Advance (0)
        • B12v - 2…d5 3.e5 Bf5 4.Nc3 e6 - Advance (0)
        • B12v - 2…d5 3.e5 Bf5 4.Nc3 h5 - Advance (0)
        • B12v - 2…d5 3.e5 Bf5 4.Nc3 Qb6 - Advance (21)
        • B12w - 2…d5 3.e5 Bf5 4.Nc3 e6 5.g4 - Advance Main Line (0)
        • B12w - 2…d5 3.e5 Bf5 4.Nc3 e6 5.g4 Bg6 6.Nge2 - Advance Main Line (51)
        • B12x - 2…d5 3.e5 Bf5 4.Nc3 e6 5.g4 Bg6 6.Nge2 c5 - Advance Main Line (0)
      • B13 - 1.e4 c6 2.d4 d5 3.exd5 - Caro-Kann (287)
        • B13a - 3…Qxd5 - Exchange (0)
        • B13a - Exchange Variation (0)
        • B13b - 3…cxd5 - Exchange (6)
        • B13c - 3…cxd5 4.Nf3 - Exchange (26)
        • B13d - 3…cxd5 4.Nf3 Nf6 - Exchange (11)
        • B13e - 3…cxd5 4.Bd3 - Exchange (29)
        • B13f - 3…cxd5 4.Bd3 Nc6 - Exchange (45)
        • B13f - 3…cxd5 4.Bd3 Nc6 5.c3 - Exchange (45)
        • B13g - 3…cxd5 4.Bd3 Nc6 5.c3 g6 - Exchange (5)
        • B13h - 3…cxd5 4.Bd3 Nc6 5.c3 Nf6 - Exchange (28)
        • B13i - 3…cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Nf3 - Exchange (2)
        • B13j - 3…cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 - Exchange Rubinstein Variation (4)
        • B13k - 3…cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 Bg4 - Exchange Rubinstein (10)
        • B13l - 3…cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 Bg4 7.Qb3 Qc8 - Exchange Rubinstein (3)
        • B13m - 3…cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 Bg4 7.Qb3 Qd7 - Exchange Rubinstein (13)
        • B13n - 3…cxd5 4.c4 - Panov-Botvinnik Attack (0)
        • B13n - 3…cxd5 4.c4 e6 - Panov-Botvinnik (1)
        • B13o - 3…cxd5 4.c4 Nf6 - Panov-Botvinnik (0)
        • B13o - 3…cxd5 4.c4 Nf6 5.c5 - Panov-Botvinnik Gunderam Variation (0)
        • B13p - 3…cxd5 4.c4 Nf6 5.Nc3 - Panov-Botvinnik (0)
        • B13p - 3…cxd5 4.c4 Nf6 5.Nc3 dxc4 - Panov-Botvinnik (0)
        • B13p - 3…cxd5 4.c4 Nf6 5.Nc3 dxc4 6.Bxc4 - Panov-Botvinnik (0)
        • B13q - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 - Panov-Botvinnik (0)
        • B13q - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.cxd5 - Panov-Botvinnik (0)
        • B13q - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.cxd5 Nxd5 - Panov-Botvinnik (4)
        • B13r - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Nf3 - Panov-Botvinnik (7)
        • B13s - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Nf3 Bg4 - Panov-Botvinnik (0)
        • B13s - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Nf3 Bg4 7.cxd5 - Panov-Botvinnik (0)
        • B13s - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Nf3 Bg4 7.cxd5 Nxd5 - Panov-Botvinnik (3)
        • B13t - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Nf3 Bg4 7.cxd5 Nxd5 8.Qb3 - Panov-Botvinnik Bg4: (0)
        • B13t - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Nf3 Bg4 7.cxd5 Nxd5 8.Qb3 Bxf3 9.gxf3 Nb6 - Panov-Botvinnik Bg4: (2)
        • B13u - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Nf3 Bg4 7.cxd5 Nxd5 8.Qb3 Bxf3 9.gxf3 e6 - Panov-Botvinnik Bg4: Main Line (13)
        • B13v - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 - Panov-Botvinnik (6)
        • B13v - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 dxc4 - Panov-Botvinnik (0)
        • B13v - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 dxc4 7.d5 Na5 - Panov-Botvinnik Herzog Defence (16)
        • B13v - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qb6 - Panov-Botvinnik Spielmann Variation (0)
        • B13w - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qa5 - Panov-Botvinnik Czerniak Variation (1)
        • B13x - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Be6 - Panov-Botvinnik (0)
        • B13y - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6 - Panov-Botvinnik Normal Variation (0)
        • B13y - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nf3 - Panov-Botvinnik Normal Variation (0)
        • B13y - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nf3 Be7 - Panov-Botvinnik Normal Variation (2)
        • B13z - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nf3 Be7 8.c5 - Panov-Botvinnik Normal Variaiton (0)
        • B13z - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nf3 Be7 8.c5 O-O - Panov-Botvinnik Normal Variation (0)
        • B13z - 3…cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nf3 Be7 8.c5 O-O 9.Bb5 - Panov-Botvinnik Normal Variation (5)
      • B14 - 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 g6 - Caro-Kann (161)
        • B14a - 6.Nf3 - Panov-Botvinnik (7)
        • B14a - Panov-Botvinnik, 5…g6 (1)
        • B14b - 6.cxd5 - Panov-Botvinnik (0)
        • B14c - 6.cxd5 Nxd5 - Panov-Botvinnik (2)
        • B14d - 6.cxd5 Nxd5 7.Bc4 - Panov-Botvinnik (4)
        • B14e - 6.cxd5 Bg7 - Panov-Botvinnik (1)
        • B14f - 6.Qb3 - Panov-Botvinnik (0)
        • B14f - 6.Qb3 Bg7 7.cxd5 - Panov-Botvinnik (0)
        • B14f - 6.Qb3 Bg7 7.cxd5 O-O - Panov-Botvinnik Main Line (4)
        • B14g - 6.Qb3 Bg7 7.cxd5 O-O 8.Be2 - Panov-Botvinnik Main Line (7)
        • B14h - 6.Qb3 Bg7 7.cxd5 O-O 8.Be2 Nbd7 - Panov-Botvinnik Main Line (3)
        • B14i - Panov-Botvinnik, 5…e6 (83)
        • B14j - 6.Nf3 - Panov-Botvinnik (0)
        • B14j - 6.Nf3 Nc6 - Panov-Botvinnik (0)
        • B14k - 6.Nf3 Be7 - Panov-Botvinnik (1)
        • B14l - 6.Nf3 Be7 7.Bd3 - Panov-Botvinnik (0)
        • B14m - 6.Nf3 Be7 7.cxd5 - Panov-Botvinnik (5)
        • B14n - 6.Nf3 Be7 7.cxd5 Nxd5 - Panov-Botvinnik (3)
        • B14o - 6.Nf3 Be7 7.cxd5 Nxd5 8.Bd3 - Panov-Botvinnik (0)
        • B14p - 6.Nf3 Bb4 - Panov-Botvinnik (9)
        • B14q - 6.Nf3 Bb4 7.cxd5 exd5 - Panov-Botvinnik (3)
        • B14r - 6.Nf3 Bb4 7.cxd5 Nxd5 - Panov-Botvinnik (1)
        • B14s - 6.Nf3 Bb4 7.cxd5 Nxd5 8.Qc2 - Panov-Botvinnik (2)
        • B14t - 6.Nf3 Bb4 7.cxd5 Nxd5 8.Qc2 Nc6 - Panov-Botvinnik (5)
        • B14u - 6.Nf3 Bb4 7.cxd5 Nxd5 8.Qc2 Nc6 9.Bd3 - Panov-Botvinnik (6)
        • B14v - 6.Nf3 Bb4 7.cxd5 Nxd5 8.Bd2 - Panov-Botvinnik (6)
        • B14w - 6.Nf3 Bb4 7.cxd5 Nxd5 8.Bd2 Nc6 - Panov-Botvinnik (8)
        • B14x - 6.Nf3 Bb4 7.cxd5 Nxd5 8.Bd2 Nc6 9.Bd3 O-O - Panov-Botvinnik (0)
      • B15 - 1.e4 c6 2.d4 d5 3.Nc3 - Caro-Kann (144)
        • B15a - 3.Nc3 (0)
        • B15b - 3…b5 - Gurgenidze Counterattack (1)
        • B15c - 3…g6 - Gurgenidze/Modern (2)
        • B15d - 3…g6 4.Be3 - Gurgenidze: (0)
        • B15d - 3…g6 4.Be3 Bg7 - Gurgenidze: (2)
        • B15e - 3…g6 4.h3 - Gurgenidze: (0)
        • B15e - 3…g6 4.h3 Bg7 - Gurgenidze: (0)
        • B15f - 3…g6 4.e5 - Gurgenidze: (0)
        • B15f - 3…g6 4.e5 Bg7 - Gurgenidze: (1)
        • B15g - 3…g6 4.e5 Bg7 5.f4 - Gurgenidze: (0)
        • B15g - 3…g6 4.e5 Bg7 5.f4 Nh6 - Gurgenidze: (12)
        • B15h - 3…g6 4.e5 Bg7 5.f4 h5 - Gurgenidze: (0)
        • B15i - 3…g6 4.e5 Bg7 5.f4 h5 6.Nf3 - Gurgenidze: (2)
        • B15j - 3…g6 4.Nf3 - Gurgenidze: (0)
        • B15k - 3…g6 4.Nf3 Bg7 - Gurgenidze: (0)
        • B15k - 3…g6 4.Nf3 Bg7 5.e5 - Gurgenidze: (0)
        • B15k - 3…g6 4.Nf3 Bg7 5.exd5 - Gurgenidze: (3)
        • B15l - 3…g6 4.Nf3 Bg7 5.h3 - Gurgenidze: (7)
        • B15m - 3…g6 4.Nf3 Bg7 5.h3 dxe4 - Gurgenidze: (0)
        • B15m - 3…g6 4.Nf3 Bg7 5.h3 dxe4 6.Nxe4 - Gurgenidze: (10)
        • B15n - 3…g6 4.Nf3 Bg7 5.h3 Nf6 - Gurgenidze: (5)
        • B15o - 3…g6 4.Nf3 Bg7 5.h3 Nf6 6.e5 - Gurgenidze: (4)
        • B15p - 3…dxe4 (18)
        • B15p - 3…dxe4 4.Bc4 - von Hennig Gambit (1)
        • B15p - 3…dxe4 4.f3 - Rasa-Studier Gambit (0)
        • B15q - 3…dxe4 4.Nxe4 (0)
        • B15r - 3…dxe4 4.Nxe4 Nf6 (0)
        • B15r - 3…dxe4 4.Nxe4 Nf6 5.Bd3 - Alekhine Gambit (5)
        • B15r - 3…dxe4 4.Nxe4 Nf6 5.f3 - Gambit (0)
        • B15s - 3…dxe4 4.Nxe4 Nf6 5.Ng3 (3)
        • B15t - 3…dxe4 4.Nxe4 Nf6 5.Nxf6+ (0)
        • B15t - 3…dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 - Tartakower (Nimzowitsch) Variation (21)
        • B15u - 3…dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.Bc4 - Tartakower Forgacs Variation (4)
        • B15v - 3…dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.c3 - Tartakower (43)
      • B16 - 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6 - Caro-Kann (16)
        • B16a - Bronstein-Larsen (0)
        • B16b - 6.Qd3 - Bronstein-Larsen (0)
        • B16c - 6.Ne2 - Bronstein-Larsen (1)
        • B16d - 6.Bc4 - Bronstein-Larsen (2)
        • B16e - 6.Nf3 - Bronstein-Larsen (0)
        • B16f - 6.Nf3 Bf5 - Bronstein-Larsen (3)
        • B16g - 6.Nf3 Bg4 - Bronstein-Larsen (2)
        • B16h - 6.Nf3 Bg4 7.Be2 e6 - Bronstein-Larsen (0)
        • B16i - 6.c3 - Bronstein-Larsen (5)
        • B16j - 6.c3 Bf5 - Bronstein-Larsen (2)
        • B16k - 6.c3 Bf5 7.Ne2 - Bronstein-Larsen (0)
        • B16l - 6.c3 Bf5 7.Nf3 - Bronstein-Larsen (1)
        • B16m - 6.c3 Bf5 7.Nf3 Qc7 - Bronstein-Larsen (0)
        • B16n - 6.c3 Bf5 7.Nf3 e6 - Bronstein-Larsen (0)
      • B17 - 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 - Caro-Kann (158)
        • B17a - Steinitz Variation (0)
        • B17b - 5.Nf3 - Steinitz (0)
        • B17c - 5.Nf3 Ngf6 - Steinitz (3)
        • B17d - 5.Nf3 Ngf6 6.Nxf6+ - Steinitz (29)
        • B17e - 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Bc4 - Steinitz (3)
        • B17f - 5.Nf3 Ngf6 6.Ng3 - Steinitz (1)
        • B17g - 5.Nf3 Ngf6 6.Ng3 e6 - Steinitz (8)
        • B17h - 5.Ng5 - Steinitz (9)
        • B17i - 5.Ng5 Ngf6 - Steinitz (0)
        • B17j - 5.Ng5 Ngf6 6.Bd3 - Steinitz (4)
        • B17k - 5.Ng5 Ngf6 6.Bd3 e6 - Steinitz (6)
        • B17l - 5.Ng5 Ngf6 6.Bd3 e6 7.N1f3 Bd6 8.Qe2 - Steinitz (0)
        • B17m - 5.Ng5 Ngf6 6.Bd3 e6 7.N1f3 Bd6 8.Qe2 h6 9.Ne4 Nxe4 10.Qxe4 - Steinitz Main Line (8)
        • B17n - 5.Ng5 Ngf6 6.Bd3 e6 7.N1f3 Bd6 8.Qe2 h6 9.Ne4 Nxe4 10.Qxe4 Qc7 - Steinitz Main Line (30)
        • B17o - 5.Ng5 Ngf6 6.Bd3 e6 7.N1f3 Bd6 8.Qe2 h6 9.Ne4 Nxe4 10.Qxe4 Nf6 - Steinitz Main Line (9)
        • B17p - 5.Bc4 - Steinitz (0)
        • B17q - 5.Bc4 Ngf6 - Steinitz (5)
        • B17r - 5.Bc4 Ngf6 6.Ng5 - Steinitz (1)
        • B17s - 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6 8.Bb3 - Steinitz (26)
        • B17t - 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6 8.Bd3 - Steinitz (0)
        • B17u - 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6 8.Bd3 h6 - Steinitz (16)
      • B18 - 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 - Caro-Kann (90)
        • B18a - Classical (0)
        • B18b - 5.Nc5 - Classical (1)
        • B18c - 5.Nc5 b6 - Classical (7)
        • B18d - 5.Ng3 - Classical (0)
        • B18e - 5.Ng3 Bg6 - Classical (2)
        • B18f - 5.Ng3 Bg6 6.f4 - Classical Maroczy Attack (2)
        • B18g - 5.Ng3 Bg6 6.Nh3 - Classical Flohr Variation (15)
        • B18h - 5.Ng3 Bg6 6.N1e2 - Classical (6)
        • B18i - 5.Ng3 Bg6 6.Bc4 - Classical (4)
        • B18j - 5.Ng3 Bg6 6.Bc4 e6 7.N1e2 - Classical (8)
        • B18k - 5.Ng3 Bg6 6.Bc4 e6 7.N1e2 Nf6 - Classical (7)
        • B18l - 5.Ng3 Bg6 6.Nf3 - Classical (7)
        • B18m - 5.Ng3 Bg6 6.Nf3 Nd7 - Classical (4)
        • B18n - 5.Ng3 Bg6 6.Nf3 Nd7 7.Bd3 - Classical (4)
        • B18o - 5.Ng3 Bg6 6.Nf3 Nd7 7.Bd3 e6 - Classical (8)
        • B18p - 5.Ng3 Bg6 6.h4 - Classical (2)
        • B18p - 5.Ng3 Bg6 6.h4 h6 - Classical (3)
        • B18q - 5.Ng3 Bg6 6.h4 h6 7.Nh3 - Classical (8)
        • B18r - 5.Ng3 Bg6 6.h4 h6 7.f4 - Classical (2)
        • B18s - 5.Ng3 Bg6 6.h4 h6 7.h5 - Classical (0)
      • B19 - 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 - Caro-Kann (369)
        • B19a - Classical, 7.Nf3 (0)
        • B19b - 7…e6 - Classical (32)
        • B19c - 7…Nf6 - Classical (0)
        • B19d - 7…Nf6 8.h5 - Classical (1)
        • B19d - 7…Nf6 8.h5 Bh7 - Classical (0)
        • B19e - 7…Nf6 8.Ne5 - Classical (1)
        • B19f - 7…Nf6 8.Ne5 Bh7 9.Bd3 - Classical (10)
        • B19g - 7…Nd7 - Classical (188)
        • B19h - 7…Nd7 8.h5 - Classical Spassky Variation (2)
        • B19h - 7…Nd7 8.h5 Bh7 - Classical Spassky Variation (1)
        • B19i - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 - Classical Spassky (0)
        • B19j - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Ngf6 - Classical Spassky (19)
        • B19k - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 e6 - Classical Spassky (38)
        • B19l - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 e6 11.Bf4 - Classical Spassky (45)
        • B19m - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Qc7 - Classical Spassky (2)
        • B19n - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Qc7 11.Bd2 - Classical Spassky (0)
        • B19o - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Qc7 11.Bd2 e6 - Classical Spassky (2)
        • B19p - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Qc7 11.Bd2 e6 12.O-O-O - Classical Spassky (0)
        • B19q - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Qc7 11.Bd2 e6 12.O-O-O Ngf6 - Classical Spassky Main Line (7)
        • B19r - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Qc7 11.Bd2 e6 12.O-O-O Ngf6 13.Ne4 - Classical Spassky Main Line (8)
        • B19s - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Qc7 11.Bd2 e6 12.O-O-O Ngf6 13.Ne4 O-O-O - Classical Spassky Main Line (7)
        • B19t - 7…Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Qc7 11.Bd2 e6 12.O-O-O Ngf6 13.Ne4 O-O-O 14.g3 Nxe4 - Classical Spassky Main Line (6)
    • B20 - B99 - 1. e4 c5 - Sicilian Defense (9143)
      • B20 - 1.e4 c5 - Sicilian Defence (142)
        • B20b - Wing Gambit, Marienbad Variation (2)
      • B21 - 1.e4 c5 2.f4 - Sicilian (46)
        • B21a - Grand Prix Attack (3)
        • B21b - 2…g6 - Grand Prix (0)
        • B21c - 2…d6 - Grand Prix (0)
        • B21d - 2…e6 - Grand Prix (1)
        • B21d - 2…e6 3.Nf3 - Grand Prix (2)
        • B21e - 2…Nc6 - Grand Prix (0)
        • B21e - 2…Nc6 3.d3 - Grand Prix (10)
        • B21f - 2…Nc6 3.Nf3 - Grand Prix (0)
        • B21g - 2…Nc6 3.Nf3 e6 - Grand Prix (2)
        • B21h - 2…Nc6 3.Nf3 g6 - Grand Prix (2)
        • B21i - 2…d5 - Grand Prix Tal Defence (0)
        • B21i - 2…d5 3.e5 - Grand Prix Tal Defence (0)
        • B21i - 2…d5 3.Nc3 - Grand Prix Toilet Variation (1)
        • B21j - 2…d5 3.exd5 - Grand Prix Tal Defence (0)
        • B21j - 2…d5 3.exd5 Qxd5 - Grand Prix Tal Defence (0)
        • B21k - 2…d5 3.exd5 Nf6 - Grand Prix Tal Gambit (0)
        • B21l - 2…d5 3.exd5 Nf6 4.Bb5+ - Grand Prix Tal Gambit (0)
        • B21m - 2…cxd4 - Smith-Morra (0)
        • B21m - 2…cxd4 3.f4 - Halasz Gambit (1)
        • B21m - 2…d5 - Smith-Morra (0)
        • B21m - Smith-Morra Gambit (23)
        • B21n - 2…cxd4 3.Nf3 - Smith-Morra Morphy Gambit (0)
        • B21n - 2…cxd4 3.Nf3 e5 4.c3 - Smith-Morra Andreaschek Gambit (0)
        • B21o - 2…cxd4 3.c3 - Smith-Morra (0)
        • B21p - 2…cxd4 3.c3 Nf6 - Smith-Morra (0)
        • B21q - 2…cxd4 3.c3 d5 - Smith-Morra (0)
        • B21r - 2…cxd4 3.c3 d3 - Smith-Morra (0)
        • B21s - 2…cxd4 3.c3 dxc3 - Smith-Morra Accepted (0)
        • B21s - 2…cxd4 3.c3 dxc3 4.Nxc3 - Smith-Morra Accepted (0)
        • B21t - 2…cxd4 3.c3 dxc3 4.Nxc3 d6 - Smith-Morra (0)
        • B21u - 2…cxd4 3.c3 dxc3 4.Nxc3 e6 - Smith-Morra (0)
        • B21v - 2…cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 - Smith-Morra (0)
        • B21w - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 - Smith-Morra (0)
        • B21w - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 - Smith-Morra (1)
        • B21x - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 - Smith-Morra (0)
        • B21y - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 - Smith-Morra (0)
        • B21y - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 - Smith-Morra (0)
        • B21y - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 a6 - Smith-Morra (0)
        • B21y - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 - Smith-Morra (0)
        • B21y - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 7.O-O - Smith-Morra (0)
        • B21y - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 7.O-O a6 8.Qe2 b5 9.Bb3 Ra7 - Smith-Morra Gambit Chicago Defence (0)
        • B21z - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 7.O-O Nf6 - Smith-Morra (0)
        • B21z - 2…cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 7.O-O Nf6 8.Qe2 Be7 - Smith-Morra (0)
      • B22 - 1.e4 c5 2.c3 - Sicilian (733)
        • B22a - 2…e5 - Alapin (2)
        • B22a - 2…g6 - Alapin (0)
        • B22a - 2…g6 3.d4 - Alapin (0)
        • B22a - 2…g6 3.d4 cxd4 - Alapin (9)
        • B22a - Alapin (363)
        • B22b - 2…Nc6 - Alapin (4)
        • B22b - 2…Nc6 3.d4 - Alapin (0)
        • B22b - 2…Nc6 3.Nf3 - Alapin (6)
        • B22c - 2…e6 - Alapin (1)
        • B22c - 2…e6 3.Nf3 - Alapin (1)
        • B22c - 2…e6 3.Nf3 d5 - Alapin (41)
        • B22d - 2…e6 3.d4 - Alapin (0)
        • B22d - 2…e6 3.d4 d5 - Alapin (0)
        • B22d - 2…e6 3.d4 d5 4.exd5 - Alapin (0)
        • B22d - 2…e6 3.d4 d5 4.exd5 exd5 - Alapin (0)
        • B22d - 2…e6 3.d4 d5 4.exd5 exd5 5.Nf3 - Alapin (0)
        • B22d - 2…e6 3.d4 d5 4.exd5 exd5 5.Nf3 Nc6 - Alapin (27)
        • B22e - 2…d6 - Alapin (20)
        • B22f - 2…d5 - Alapin (7)
        • B22f - 2…d5 3.exd5 - Alapin (0)
        • B22f - 2…d5 3.exd5 Qxd5 - Alapin (7)
        • B22f - 2…d5 3.exd5 Qxd5 4.d4 - Alapin (0)
        • B22f - 2…d5 3.exd5 Qxd5 4.d4 cxd4 - Alapin (0)
        • B22f - 2…d5 3.exd5 Qxd5 4.d4 cxd4 5.cxd4 - Alapin (13)
        • B22g - 2…d5 3.exd5 Qxd5 4.d4 e6 - Alapin (0)
        • B22g - 2…d5 3.exd5 Qxd5 4.d4 e6 5.Nf3 - Alapin (16)
        • B22h - 2…d5 3.exd5 Qxd5 4.d4 Nc6 - Alapin (0)
        • B22h - 2…d5 3.exd5 Qxd5 4.d4 Nc6 5.Nf3 - Alapin (1)
        • B22h - 2…d5 3.exd5 Qxd5 4.d4 Nc6 5.Nf3 cxd4 - Alapin (0)
        • B22h - 2…d5 3.exd5 Qxd5 4.d4 Nc6 5.Nf3 cxd4 6.cxd4 - Alapin (14)
        • B22i - 2…d5 3.exd5 Qxd5 4.d4 Nc6 5.Nf3 Bg4 - Alapin (3)
        • B22j - 2…d5 3.exd5 Qxd5 4.d4 Nf6 - Alapin (0)
        • B22j - 2…d5 3.exd5 Qxd5 4.d4 Nf6 5.Nf3 - Alapin (17)
        • B22k - 2…d5 3.exd5 Qxd5 4.d4 Nf6 5.Nf3 Bg4 - Alapin (0)
        • B22l - 2…d5 3.exd5 Qxd5 4.d4 Nf6 5.Nf3 Bg4 6.Be2 e6 - Alapin (5)
        • B22m - 2…d5 3.exd5 Qxd5 4.d4 Nf6 5.Nf3 e6 6.Be3 - Alapin (6)
        • B22n - 2…d5 3.exd5 Qxd5 4.d4 Nf6 5.Nf3 e6 6.Be2 - Alapin (7)
        • B22o - 2…Nf6 - Alapin (28)
        • B22o - 2…Nf6 3.e5 - Alapin (13)
        • B22o - 2…Nf6 3.e5 Nd5 - Alapin (0)
        • B22o - 2…Nf6 3.e5 Nd5 4.g3 - Alapin (15)
        • B22p - 2…Nf6 3.e5 Nd5 4.d4 - Alapin (2)
        • B22p - 2…Nf6 3.e5 Nd5 4.Nf3 - Alapin (4)
        • B22p - 2…Nf6 3.e5 Nd5 4.Nf3 Nc6 - Alapin (0)
        • B22q - 2…Nf6 3.e5 Nd5 4.d4 cxd4 - Alapin (0)
        • B22q - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.Bc4 - Alapin (0)
        • B22q - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.Qxd4 - Alapin (7)
        • B22r - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.Nf3 - Alapin (0)
        • B22r - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.Nf3 e6 - Alapin (0)
        • B22r - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.Nf3 Nc6 - Alapin (8)
        • B22s - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.Nf3 Nc6 6.Bc4 - Alapin (12)
        • B22t - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 - Alapin (0)
        • B22t - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 d6 - Alapin (0)
        • B22t - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 d6 6.Nf3 - Alapin (0)
        • B22t - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 d6 6.Nf3 Nc6 - Alapin (3)
        • B22t - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 Nc6 - Alapin (0)
        • B22t - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 Nc6 6.Nf3 - Alapin (0)
        • B22u - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 d6 6.Nf3 Nc6 7.Bc4 - Alapin (0)
        • B22u - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 d6 6.Nf3 Nc6 7.Bc4 Nb6 - Alapin (0)
        • B22u - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 d6 6.Nf3 Nc6 7.Bc4 Nb6 8.Bb5 - Alapin (27)
        • B22v - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 e6 - Alapin (0)
        • B22v - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 e6 6.Nf3 - Alapin (9)
        • B22v - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 e6 6.Nf3 Nc6 - Alapin (7)
        • B22w - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 e6 6.Nf3 d6 - Alapin (28)
        • B22x - 2…Nf6 3.e5 Nd5 4.d4 cxd4 5.cxd4 e6 6.Nf3 b6 - Alapin (0)
      • B23 - 1.e4 c5 2.Nc3 - Sicilian (212)
        • B23a - Closed (11)
        • B23b - 2…g6 - Closed (0)
        • B23c - 2…d6 - Closed (0)
        • B23c - 2…d6 3.Nge2 - Closed (0)
        • B23d - 2…d6 3.g3 - Closed (0)
        • B23e - 2…d6 3.f4 - Closed (0)
        • B23f - 2…e6 - Closed (4)
        • B23g - 2…e6 3.f4 - Closed (7)
        • B23h - 2…e6 3.Nge2 - Closed (9)
        • B23i - 2…e6 3.g3 - Closed (2)
        • B23j - 2…e6 3.g3 d5 - Closed Korchnoi Variation (0)
        • B23k - 2…Nc6 - Closed (97)
        • B23l - 2…Nc6 3.Bb5 - Closed (12)
        • B23m - 2…Nc6 3.Bb5 Nd4 - Closed (69)
        • B23n - 2…Nc6 3.Nge2 - Chameleon Variation (0)
        • B23n - 2…Nc6 3.Nge2 e5 - Chameleon (0)
        • B23o - 2…Nc6 3.f4 - Closed Grand Prix (0)
        • B23o - 2…Nc6 3.f4 d6 - Closed Grand Prix (0)
        • B23p - 2…Nc6 3.f4 d6 4.Nf3 g6 - Closed Grand Prix (0)
        • B23q - 2…Nc6 3.f4 e6 4.Nf3 - Closed Grand Prix (0)
        • B23r - 2…Nc6 3.f4 e6 4.Nf3 d5 - Closed Grand Prix (1)
        • B23s - 2…Nc6 3.f4 g6 - Closed Grand Prix (0)
        • B23t - 2…Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 - Closed Grand Prix (0)
        • B23u - 2…Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 e6 - Closed Grand Prix (0)
        • B23v - 2…Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 e6 6.f5 - Closed Grand Prix Schofman Variation (0)
        • B23w - 2…Nc6 3.f4 g6 4.Nf3 Bg7 5.Bb5 Nd4 - Closed Grand Prix (0)
        • B23x - 2…Nc6 3.f4 g6 4.Nf3 Bg7 5.Bb5 Nd4 6.Bd3 - Closed Grand Prix (0)
        • B23y - 2…Nc6 3.f4 g6 4.Nf3 Bg7 5.Bb5 Nd4 6.O-O - Closed Grand Prix (0)
      • B24 - 1.e4 c5 2.Nc3 Nc6 3.g3 - Sicilian (22)
      • B25 - 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 - Sicilian (80)
        • B25a - Closed, 3.g3, 5.d3 d6 (30)
        • B25b - 6.Nge2 - Closed (1)
        • B25c - 6.Nge2 e5 - Closed Botvinnik (2)
        • B25d - 6.Nge2 e6 - Closed (5)
        • B25e - 6.f4 - Closed (1)
        • B25f - 6.f4 Rb8 - Closed (0)
        • B25g - 6.f4 Nf6 - Closed (1)
        • B25h - 6.f4 Nf6 7.Nf3 - Closed (1)
        • B25i - 6.f4 e5 - Closed (9)
        • B25j - 6.f4 e5 7.Nf3 - Closed (0)
        • B25j - 6.f4 e5 7.Nf3 Nge7 - Closed (1)
        • B25k - 6.f4 e5 7.Nf3 Nge7 8.O-O - Closed (2)
        • B25l - 6.f4 e6 - Closed (14)
        • B25m - 6.f4 e6 7.Nf3 - Closed (0)
        • B25n - 6.f4 e6 7.Nf3 Nge7 - Closed (1)
        • B25o - 6.f4 e6 7.Nf3 Nge7 8.O-O - Closed (1)
        • B25p - 6.f4 e6 7.Nf3 Nge7 8.O-O O-O - Closed (3)
        • B25q - 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 9.Be3 - Closed e6: (0)
        • B25r - 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 9.Be3 Rb8 - Closed e6: (1)
        • B25s - 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 9.Be3 b6 - Closed e6: (1)
        • B25t - 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 9.Be3 Nd4 - Closed e6: (4)
        • B25u - 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 9.Be3 Nd4 10.Rb1 - Closed e6: (2)
        • B25v - 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 9.Be3 Nd4 10.Qd2 - Closed e6: (0)
        • B25w - 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 9.Be3 Nd4 10.e5 - Closed e6: (0)
        • B25x - 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 9.Be3 Nd4 10.e5 Nef5 - Closed e6: (0)
      • B26 - 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Be3 - Sicilian (80)
        • B26a - Closed, 6.Be3 (41)
        • B26b - 6…Nf6 - Closed (2)
        • B26c - 6…Nf6 7.h3 - Closed (2)
        • B26d - 6…e5 - Closed (2)
        • B26e - 6…e5 7.Qd2 - Closed (4)
        • B26f - 6…e5 7.Qd2 Nge7 - Closed (0)
        • B26g - 6…Rb8 - Closed (4)
        • B26h - 6…Rb8 7.Qd2 - Closed (0)
        • B26i - 6…Rb8 7.Qd2 b5 - Closed (2)
        • B26j - 6…Rb8 7.Qd2 b5 8.Nge2 - Closed (8)
        • B26k - 6…e6 - Closed (2)
        • B26l - 6…e6 7.Qd2 - Closed (6)
        • B26m - 6…e6 7.Qd2 Qa5 - Closed (2)
        • B26n - 6…e6 7.Qd2 Nd4 - Closed (4)
        • B26o - 6…e6 7.Qd2 Nge7 - Closed (0)
        • B26p - 6…e6 7.Qd2 Rb8 - Closed (0)
        • B26q - 6…e6 7.Qd2 Rb8 8.Nge2 - Closed (1)
      • B27 - 1.e4 c5 2.Nf3 - Sicilian (237)
        • B27a - 2.Nf3 (7)
        • B27b - 2…Qa5 - Mongoose Variation (0)
        • B27c - 2…Qc7 - Quinteros Variation (2)
        • B27d - 2…b6 - Katalimov Variation (9)
        • B27e - 2…g6 - Hungarian Variation (84)
        • B27f - 2…g6 3.c4 - Hungarian (0)
        • B27g - 2…g6 3.c3 - Hungarian (31)
        • B27h - 2…g6 3.c3 Bg7 4.d4 cxd4 5.cxd4 - Hungarian (2)
        • B27i - 2…g6 3.c3 Bg7 4.d4 cxd4 5.cxd4 d5 - Hungarian (16)
        • B27j - 2…g6 3.d4 - Hungarian (40)
        • B27k - 2…g6 3.d4 cxd4 - Hungarian (18)
        • B27l - 2…g6 3.d4 cxd4 4.Nxd4 - Hungarian (0)
        • B27m - 2…g6 3.d4 Bg7 - Accelerated Pterodactyl (22)
        • B27n - 2…g6 3.d4 Bg7 4.dxc5 - Accelerated Pterodactyl (0)
        • B27o - 2…g6 3.d4 Bg7 4.dxc5 Qa5+ - Accelerated Pterodactyl (0)
        • B27q - 2…g6 3.d4 Bg7 4.dxc5 Qa5+ 5.c3 - Accelerated Pterodactyl (0)
        • B27r - 2…g6 3.d4 Bg7 4.dxc5 Qa5+ 5.c3 Qxc5 - Accelerated Pterodactyl (3)
        • B27s - 2…g6 3.d4 Bg7 4.c4 - Accelerated Pterodactyl (2)
        • B27t - 2…g6 3.d4 Bg7 4.c4 Qa5+ - Accelerated Pterodactyl (1)
      • B28 - 1.e4 c5 2.Nf3 a6 - Sicilian (57)
        • B28a - O’Kelly Variation (39)
        • B28b - 3.Nc3 - O’Kelly (0)
        • B28c - 3.d4 - O’Kelly (0)
        • B28d - 3.d4 cxd4 4.Nxd4 - O’Kelly (0)
        • B28e - 3.d4 cxd4 4.Nxd4 Nf6 - O’Kelly (3)
        • B28f - 3.c4 - O’Kelly (0)
        • B28g - 3.c4 e6 - O’Kelly (0)
        • B28h - 3.c3 - O’Kelly (0)
        • B28i - 3.c3 e6 - O’Kelly (3)
        • B28j - 3.c3 d5 - O’Kelly (12)
      • B29 - 1.e4 c5 2.Nf3 Nf6 - Sicilian (85)
        • B29a - Nimzowitsch (31)
        • B29b - 3.d3 - Nimzowitsch (1)
        • B29c - 3.Nc3 - Nimzowitsch (0)
        • B29d - 3.Nc3 d5 - Nimzowitsch (4)
        • B29e - 3.Nc3 d5 4.exd5 - Nimzowitsch (8)
        • B29f - 3.e5 - Nimzowitsch (0)
        • B29f - 3.e5 Nd5 - Nimzowitsch (0)
        • B29g - 3.e5 Nd5 4.c4 - Nimzowitsch (1)
        • B29h - 3.e5 Nd5 4.d4 - Nimzowitsch (3)
        • B29i - 3.e5 Nd5 4.Nc3 - Nimzowitsch (0)
        • B29j - 3.e5 Nd5 4.Nc3 Nxc3 - Nimzowitsch (27)
        • B29k - 3.e5 Nd5 4.Nc3 e6 - Nimzowitsch (4)
        • B29l - 3.e5 Nd5 4.Nc3 e6 5.Nxd5 - Nimzowitsch (0)
        • B29m - 3.e5 Nd5 4.Nc3 e6 5.Nxd5 exd5 6.d4 Nc6 - Nimzowitsch Rubinstein Countergambit (0)
        • B29n - 3.e5 Nd5 4.Nc3 e6 5.Nxd5 exd5 6.d4 Nc6 7.dxc5 - Nimzowitsch Rubinstein Countergambit (6)
      • B30 - B39 1.e4 c5 2. Nf3 Nc6 Sicilian defence (1755)
        • B30 - 1.e4 c5 2.Nf3 Nc6 - Sicilian (842)
          • B30a - 2…Nc6 (52)
          • B30b - 3.b3 (0)
          • B30c - 3.d3 Nf6 (1)
          • B30d - 3.g3 (1)
          • B30e - 3.g3 e6 4.d3 (26)
          • B30f - 3.g3 e6 4.d3 d5 (11)
          • B30g - 3.Bc4 (2)
          • B30h - 3.Nc3 Nf6 (29)
          • B30i - 3.Nc3 g6 (3)
          • B30j - 3.Nc3 e5 (95)
          • B30k - 3.Bb5 - Rossolimo (313)
          • B30l - 3.Bb5 Qb6 - Rossolimo (3)
          • B30m - 3.Bb5 Nf6 - Rossolimo (71)
          • B30n - 3.Bb5 e6 - Rossolimo (34)
          • B30o - 3.Bb5 e6 4.b3 - Rossolimo (1)
          • B30p - 3.Bb5 e6 4.Nc3 - Rossolimo (4)
          • B30q - 3.Bb5 e6 4.Bxc6 - Rossolimo (56)
          • B30r - 3.Bb5 e6 4.O-O - Rossolimo (1)
          • B30s - 3.Bb5 e6 4.O-O Nge7 - Rossolimo (41)
          • B30s - 3.Bb5 e6 4.O-O Nge7 5.b3 - Rossolimo (0)
          • B30t - 3.Bb5 e6 4.O-O Nge7 5.Re1 - Rossolimo (58)
          • B30u - 3.Bb5 e6 4.O-O Nge7 5.Nc3 - Rossolimo (9)
          • B30v - 3.Bb5 e6 4.O-O Nge7 5.c3 - Rossolimo (5)
          • B30w - 3.Bb5 e6 4.O-O Nge7 5.c3 a6 - Rossolimo (26)
        • B31 - 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 - Sicilian (376)
          • B31a - Rossolimo, 3…g6 (0)
          • B31b - 4.Nc3 - Rossolimo (16)
          • B31c - 4.Bxc6 - Rossolimo (82)
          • B31d - 4.Bxc6 dxc6 - Rossolimo (7)
          • B31e - 4.Bxc6 dxc6 5.d3 - Rossolimo (19)
          • B31f - 4.Bxc6 dxc6 5.d3 Bg7 6.h3 - Rossolimo (89)
          • B31g - 4.O-O - Rossolimo (48)
          • B31h - 4.O-O Bg7 5.c3 - Rossolimo (26)
          • B31i - 4.O-O Bg7 5.c3 e5 - Rossolimo (4)
          • B31j - 4.O-O Bg7 5.Re1 - Rossolimo (8)
          • B31k - 4.O-O Bg7 5.Re1 Nf6 - Rossolimo (6)
          • B31l - 4.O-O Bg7 5.Re1 Nf6 6.c3 - Rossolimo (3)
          • B31m - 4.O-O Bg7 5.Re1 Nf6 6.c3 O-O 7.h3 - Rossolimo (17)
          • B31n - 4.O-O Bg7 5.Re1 Nf6 6.c3 O-O 7.d4 - Rossolimo (25)
          • B31o - 4.O-O Bg7 5.Re1 e5 - Rossolimo (21)
          • B31p - 4.O-O Bg7 5.Re1 e5 6.b4 - Rossolimo Gurgenidze Variation (2)
          • B31q - 4.O-O Bg7 5.Re1 e5 6.c3 - Rossolimo (3)
        • B32 - 1.e4 c5 2.Nf3 Nc6 3.d4 - Sicilian (117)
          • B32a - 2…Nc6 3.d4 (8)
          • B32b - 3…cxd4 (0)
          • B32c - 3…cxd4 4.Nxd4 - Open (0)
          • B32d - 3…cxd4 4.Nxd4 d6 - Open (2)
          • B32e - 3…cxd4 4.Nxd4 Qb6 - Open (2)
          • B32f - 3…cxd4 4.Nxd4 Qc7 - Flohr Variation (3)
          • B32g - 3…cxd4 4.Nxd4 Qc7 5.Nb5 - Flohr (3)
          • B32h - 3…cxd4 4.Nxd4 d5 - Nimzowitsch Variation (0)
          • B32i - 3…cxd4 4.Nxd4 e5 - Loewenthal (8)
          • B32j - 3…cxd4 4.Nxd4 e5 5.Nb5 - Loewenthal (0)
          • B32k - 3…cxd4 4.Nxd4 e5 5.Nb5 a6 - Loewenthal (3)
          • B32l - 3…cxd4 4.Nxd4 e5 5.Nb5 a6 6.Nd6+ Bxd6 7.Qxd6 Qf6 8.Qxf6 - Loewenthal Queenswap (1)
          • B32m - 3…cxd4 4.Nxd4 e5 5.Nb5 a6 6.Nd6+ Bxd6 7.Qxd6 Qf6 8.Qd1 - Loewenthal (0)
          • B32n - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 - Loewenthal Kalashnikov (7)
          • B32o - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.a4 - Loewenthal Kalashnikov (1)
          • B32p - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 - Loewenthal Kalashnikov (28)
          • B32q - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 b5 - Loewenthal Kalashnikov (5)
          • B32r - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.N1c3 a6 7.Na3 b5 8.Nd5 Nge7 - Loewenthal Kalashnikov (5)
          • B32s - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 - Loewenthal Kalashnikov (8)
          • B32t - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 Be7 - Loewenthal Kalashnikov (4)
          • B32u - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 Be7 7.Be2 - Loewenthal Kalashnikov (4)
          • B32v - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 Be7 7.N1c3 - Loewenthal Kalashnikov (11)
          • B32w - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 Be7 7.N1c3 a6 8.Na3 Be6 - Loewenthal Kalashnikov Main Line (9)
          • B32x - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 Be7 7.N1c3 a6 8.Na3 Be6 9.Nc2 - Loewenthal Kalashnikov Main Line (0)
          • B32y - 3…cxd4 4.Nxd4 e5 5.Nb5 d6 6.c4 Be7 7.N1c3 a6 8.Na3 Be6 9.Be2 - Loewenthal Kalashnikov Main Line (5)
        • B33 - 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 - Sicilian (536)
          • B33a - Open, 2…Nc6 (4)
          • B33b - 5.Nc3 Qb6 6.Nb3 - Open (22)
          • B33b - 5.Nc3 Qb6 6.Nb3 e6 - Open (22)
          • B33c - 5.Nc3 Qb6 6.Nb3 e6 7.Bd3 - Open (12)
          • B33d - 5.Nc3 e5 - Pelikan/Sveshnikov (38)
          • B33d - 5.Nc3 e5 6.Nb3 - Pelikan/Sveshnikov (2)
          • B33d - 5.Nc3 e5 6.Nf3 - Pelikan/Sveshnikov (0)
          • B33d - 5.Nc3 e5 6.Nf5 - Pelikan/Sveshnikov (0)
          • B33d - 5.Nc3 e5 6.Nxc6 - Pelikan/Sveshnikov (0)
          • B33e - 5.Nc3 e5 6.Ndb5 - Pelikan/Sveshnikov (1)
          • B33e - 5.Nc3 e5 6.Ndb5 h6 - Pelikan Haberditz Variation (1)
          • B33f - 5.Nc3 e5 6.Ndb5 d6 - Pelikan/Sveshnikov Pelikan Variation (2)
          • B33f - 5.Nc3 e5 6.Ndb5 d6 7.Na3 - Pelikan (2)
          • B33g - 5.Nc3 e5 6.Ndb5 d6 7.a4 - Pelikan (0)
          • B33g - 5.Nc3 e5 6.Ndb5 d6 7.a4 a6 8.Na3 - Pelikan (0)
          • B33h - 5.Nc3 e5 6.Ndb5 d6 7.Nd5 - Pelikan (49)
          • B33i - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 - Pelikan (0)
          • B33i - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 - Pelikan (0)
          • B33j - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Bxf6 - Pelikan (1)
          • B33k - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 - Pelikan (6)
          • B33k - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 Be6 - Pelikan Bird Variation (6)
          • B33l - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 - Pelikan Chelyabinsk Variation (27)
          • B33l - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 - Pelikan Chelyabinsk (10)
          • B33m - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 Be7 - Pelikan Chelyabinsk (57)
          • B33n - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 Be7 10.Bxf6 Bxf6 11.c3 - Pelikan Chelyabinsk (30)
          • B33o - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 Be7 10.Bxf6 Bxf6 11.c3 O-O - Pelikan Chelyabinsk (19)
          • B33p - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 Be7 10.Bxf6 Bxf6 11.c3 Bg5 - Pelikan Chelyabinsk (28)
          • B33q - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 Be7 10.Bxf6 Bxf6 11.c3 O-O 12.Nc2 Bg5 - Pelikan Chelyabinsk (7)
          • B33r - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 Be7 10.Bxf6 Bxf6 11.c3 O-O 12.Nc2 Bg5 13.a4 - Pelikan Chelyabinsk (40)
          • B33s - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 - Pelikan Chelyabinsk (6)
          • B33s - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 - Pelikan Chelyabinsk (0)
          • B33s - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 - Pelikan Chelyabinsk (0)
          • B33s - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 Bg7 - Pelikan Chelyabinsk (6)
          • B33t - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 Bg7 11.Bd3 - Pelikan Chelyabinsk (26)
          • B33u - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 - Pelikan Sveshnikov Variation (13)
          • B33v - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.c3 - Pelikan Sveshnikov (24)
          • B33v - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.c3 Bg7 - Pelikan Sveshnikov (0)
          • B33v - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.c3 Bg7 12.exf5 Bxf5 - Pelikan Sveshnikov (23)
          • B33w - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.c3 Bg7 12.exf5 Bxf5 13.Nc2 O-O - Pelikan Sveshnikov (22)
          • B33x - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.Bd3 Be6 - Pelikan Sveshnikov (0)
          • B33y - 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.Bd3 Be6 12.O-O - Pelikan Sveshnikov (30)
        • B34 - 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 - Sicilian (49)
          • B34a - Accelerated Fianchetto (2)
          • B34b - 5.Bc4 - Accelerated Fianchetto (0)
          • B34c - 5.Nxc6 - Accelerated Fianchetto Exchange Variation (23)
          • B34d - 5.Be2 - Accelerated Fianchetto (0)
          • B34e - 5.Be3 - Accelerated Fianchetto (0)
          • B34f - 5.Nc3 - Accelerated Fianchetto Modern Variation (1)
          • B34g - 5.Nc3 Nf6 - Accelerated Fianchetto Modern (0)
          • B34h - 5.Nc3 Nf6 6.Nxc6 - Accelerated Fianchetto Modern (2)
          • B34i - 5.Nc3 Nf6 6.Nxc6 bxc6 - Accelerated Fianchetto Modern (1)
          • B34j - 5.Nc3 Bg7 - Accelerated Fianchetto Modern (2)
          • B34k - 5.Nc3 Bg7 6.Nde2 - Accelerated Fianchetto Modern (5)
          • B34l - 5.Nc3 Bg7 6.Nb3 - Accelerated Fianchetto Modern (4)
          • B34m - 5.Nc3 Bg7 6.Be3 - Accelerated Fianchetto Modern (0)
          • B34n - 5.Nc3 Bg7 6.Be3 d6 - Accelerated Fianchetto Modern (0)
          • B34o - 5.Nc3 Bg7 6.Be3 d6 7.Qd2 - Accelerated Fianchetto Modern (0)
          • B34p - 5.Nc3 Bg7 6.Be3 Nf6 - Accelerated Fianchetto Modern (2)
          • B34q - 5.Nc3 Bg7 6.Be3 Nf6 7.f3 - Accelerated Fianchetto Modern (0)
          • B34r - 5.Nc3 Bg7 6.Be3 Nf6 7.Nxc6 - Accelerated Fianchetto Modern (0)
          • B34r - 5.Nc3 Bg7 6.Be3 Nf6 7.Nxc6 bxc6 - Accelerated Fianchetto Modern (0)
          • B34r - 5.Nc3 Bg7 6.Be3 Nf6 7.Nxc6 bxc6 8.e5 - Accelerated Fianchetto Modern (1)
          • B34s - 5.Nc3 Bg7 6.Be3 Nf6 7.Nxc6 bxc6 8.e5 Ng8 - Accelerated Fianchetto Modern (2)
          • B34t - 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 - Accelerated Fianchetto Modern (0)
          • B34u - 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 O-O - Accelerated Fianchetto Modern (3)
          • B34v - 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 O-O 8.O-O - Accelerated Fianchetto Modern (0)
          • B34v - 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 O-O 8.O-O d5 - Accelerated Fianchetto Modern (0)
          • B34w - 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 O-O 8.O-O d5 9.exd5 - Accelerated Fianchetto Modern (1)
        • B35 - 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 - Sicilian (172)
          • B35a - Accelerated Fianchetto, Modern, 7.Bc4 (89)
          • B35b - 7…Qa5 - Accelerated Fianchetto Modern (3)
          • B35c - 7…Qa5 8.O-O O-O - Accelerated Fianchetto Modern (3)
          • B35d - 7…Qa5 8.O-O O-O 9.Bb3 - Accelerated Fianchetto Modern (8)
          • B35e - 7…Qa5 8.O-O O-O 9.Bb3 d6 10.h3 Bd7 11.f4 - Accelerated Fianchetto Modern (4)
          • B35f - 7…O-O - Accelerated Fianchetto Modern (0)
          • B35g - 7…O-O 8.f3 - Accelerated Fianchetto Modern (0)
          • B35h - 7…O-O 8.O-O - Accelerated Fianchetto Modern (1)
          • B35i - 7…O-O 8.Bb3 - Accelerated Fianchetto Modern (16)
          • B35j - 7…O-O 8.Bb3 Ng4 - Accelerated Fianchetto Modern (0)
          • B35k - 7…O-O 8.Bb3 Qa5 - Accelerated Fianchetto Modern (2)
          • B35l - 7…O-O 8.Bb3 a5 - Accelerated Fianchetto Modern (8)
          • B35m - 7…O-O 8.Bb3 a5 9.a4 - Accelerated Fianchetto Modern (3)
          • B35n - 7…O-O 8.Bb3 a5 9.f3 - Accelerated Fianchetto Modern (4)
          • B35o - 7…O-O 8.Bb3 d6 - Accelerated Fianchetto Modern (0)
          • B35o - 7…O-O 8.Bb3 d6 9.h3 - Accelerated Fianchetto Modern (11)
          • B35p - 7…O-O 8.Bb3 d6 9.h3 Bd7 - Accelerated Fianchetto Modern (3)
          • B35q - 7…O-O 8.Bb3 d6 9.f3 - Accelerated Fianchetto Modern (13)
          • B35r - 7…O-O 8.Bb3 d6 9.f3 Bd7 - Accelerated Fianchetto Modern (4)
        • B36 - 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 - Sicilian (175)
          • B36a - Maroczy Bind (78)
          • B36b - 5…d6 - Maroczy Bind (0)
          • B36b - 5…d6 6.Nc3 - Maroczy Bind (0)
          • B36b - 5…d6 6.Nc3 Bg7 - Maroczy Bind (2)
          • B36c - 5…Nf6 - Maroczy Bind (3)
          • B36d - 5…Nf6 6.Nc3 - Maroczy Bind (1)
          • B36e - 5…Nf6 6.Nc3 Nxd4 - Maroczy Bind (0)
          • B36f - 5…Nf6 6.Nc3 Nxd4 7.Qxd4 d6 - Maroczy Bind Gurgenidze Variation (16)
          • B36g - 5…Nf6 6.Nc3 d6 - Maroczy Bind (9)
          • B36h - 5…Nf6 6.Nc3 d6 7.Be2 - Maroczy Bind (0)
          • B36i - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 - Maroczy Bind (0)
          • B36i - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 - Maroczy Bind (2)
          • B36j - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.O-O - Maroczy Bind (7)
          • B36k - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Bg5 - Maroczy Bind (1)
          • B36l - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Bg5 O-O - Maroczy Bind (4)
          • B36m - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Bg5 O-O 10.Qd2 - Maroczy Bind (12)
          • B36n - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Be3 - Maroczy Bind (0)
          • B36n - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Be3 O-O - Maroczy Bind (3)
          • B36o - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Be3 O-O 10.Qd2 - Maroczy Bind (27)
          • B36p - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Be3 O-O 10.Qd2 Be6 - Maroczy Bind (4)
          • B36q - 5…Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Be3 O-O 10.Qd2 Be6 11.O-O - Maroczy Bind (6)
        • B37 - 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 - Sicilian (32)
          • B37a - Maroczy Bind, 5…Bg7 (16)
          • B37b - 6.Nb3 - Maroczy Bind (0)
          • B37c - 6.Nc2 - Maroczy Bind (1)
          • B37d - 6.Nc2 d6 - Maroczy Bind (0)
          • B37e - 6.Nc2 d6 7.Be2 - Maroczy Bind (0)
          • B37f - 6.Nc2 d6 7.Be2 Nh6 - Maroczy Bind Simagin Variation (0)
          • B37g - 6.Nc2 Nf6 - Maroczy Bind (0)
          • B37g - 6.Nc2 Nf6 7.Nc3 - Maroczy Bind (0)
          • B37h - 6.Nc2 Nf6 7.Nc3 O-O - Maroczy Bind (0)
          • B37i - 6.Nc2 Nf6 7.Nc3 d6 - Maroczy Bind (0)
          • B37i - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 - Maroczy Bind (0)
          • B37j - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 Nd7 - Maroczy Bind (4)
          • B37k - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 O-O - Maroczy Bind (1)
          • B37l - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 O-O 9.O-O - Maroczy Bind (2)
          • B37m - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 O-O 9.O-O Be6 - Maroczy Bind (2)
          • B37n - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 O-O 9.O-O Nd7 - Maroczy Bind (0)
          • B37o - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 O-O 9.O-O Nd7 10.Bd2 - Maroczy Bind (0)
          • B37o - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 O-O 9.O-O Nd7 10.Bd2 a5 - Maroczy Bind (1)
          • B37p - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 O-O 9.O-O Nd7 10.Bd2 Nc5 - Maroczy Bind (1)
          • B37q - 6.Nc2 Nf6 7.Nc3 d6 8.Be2 O-O 9.O-O Nd7 10.Bd2 Nc5 11.b4 - Maroczy Bind (4)
        • B38 - 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 - Sicilian (164)
          • B38a - Maroczy Bind, 6.Be3 (86)
          • B38b - 6…Nh6 - Maroczy Bind (0)
          • B38c - 6…d6 - Maroczy Bind (0)
          • B38c - 6…d6 7.Nc3 Nh6 - Maroczy Bind (5)
          • B38d - 6…Nf6 - Maroczy Bind (0)
          • B38d - 6…Nf6 7.Nc3 - Maroczy Bind (0)
          • B38e - 6…Nf6 7.Nc3 d6 - Maroczy Bind (2)
          • B38f - 6…Nf6 7.Nc3 d6 8.Be2 - Maroczy Bind (1)
          • B38g - 6…Nf6 7.Nc3 O-O - Maroczy Bind (0)
          • B38g - 6…Nf6 7.Nc3 O-O 8.Be2 - Maroczy Bind (1)
          • B38h - 6…Nf6 7.Nc3 O-O 8.Be2 b6 - Maroczy Bind (0)
          • B38i - 6…Nf6 7.Nc3 O-O 8.Be2 b6 9.O-O - Maroczy Bind (0)
          • B38i - 6…Nf6 7.Nc3 O-O 8.Be2 b6 9.O-O Bb7 - Maroczy Bind (1)
          • B38j - 6…Nf6 7.Nc3 O-O 8.Be2 b6 9.O-O Bb7 10.f3 - Maroczy Bind (2)
          • B38k - 6…Nf6 7.Nc3 O-O 8.Be2 b6 9.O-O Bb7 10.f3 Qb8 - Maroczy Bind (0)
          • B38l - 6…Nf6 7.Nc3 O-O 8.Be2 d6 - Maroczy Bind (1)
          • B38m - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.f3 - Maroczy Bind (5)
          • B38n - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O - Maroczy Bind (3)
          • B38o - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Nd7 - Maroczy Bind (3)
          • B38p - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O a6 - Maroczy Bind (3)
          • B38q - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Nxd4 - Maroczy Bind (5)
          • B38r - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 - Maroczy Bind (2)
          • B38s - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 10.Nc2 - Maroczy Bind (9)
          • B38t - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 10.f3 - Maroczy Bind (2)
          • B38u - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 10.Rc1 - Maroczy Bind (2)
          • B38v - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 10.Qd2 - Maroczy Bind (0)
          • B38w - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 10.Qd2 Nxd4 - Maroczy Bind (0)
          • B38w - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 10.Qd2 Nxd4 11.Bxd4 - Maroczy Bind (14)
          • B38x - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 10.Qd2 Nxd4 11.Bxd4 Bc6 12.f3 - Maroczy Bind (0)
          • B38y - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 10.Qd2 Nxd4 11.Bxd4 Bc6 12.f3 a5 - Maroczy Bind (1)
          • B38z - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Bd7 10.Qd2 Nxd4 11.Bxd4 Bc6 12.f3 a5 13.b3 - Maroczy Bind (16)
        • B39 - 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 Ng4 - Sicilian (44)
          • B39a - Maroczy Bind, Breyer Variation (22)
          • B39b - 8.Qxg4 - Maroczy Bind Breyer (0)
          • B39c - 8.Qxg4 Nxd4 - Maroczy Bind Breyer (0)
          • B39d - 8.Qxg4 Nxd4 9.Qd1 - Maroczy Bind Breyer (1)
          • B39e - 8.Qxg4 Nxd4 9.Qd1 e5 - Maroczy Bind Breyer (0)
          • B39f - 8.Qxg4 Nxd4 9.Qd1 e5 10.Nb5 - Maroczy Bind Breyer (3)
          • B39g - 8.Qxg4 Nxd4 9.Qd1 e5 10.Bd3 - Maroczy Bind Breyer (0)
          • B39h - 8.Qxg4 Nxd4 9.Qd1 Ne6 - Maroczy Bind Breyer (1)
          • B39i - 8.Qxg4 Nxd4 9.Qd1 Ne6 10.Qd2 - Maroczy Bind Breyer (3)
          • B39j - 8.Qxg4 Nxd4 9.Qd1 Ne6 10.Rc1 - Maroczy Bind Breyer (2)
          • B39k - 8.Qxg4 Nxd4 9.Qd1 Ne6 10.Rc1 Qa5 - Maroczy Bind Breyer (4)
          • B39l - 8.Qxg4 Nxd4 9.Qd1 Ne6 10.Rc1 Qa5 11.Qd2 - Maroczy Bind Breyer (8)
      • B40 - B49 1. e4 c5 2. Nf3 e6 Sicilian defence (1576)
        • B40 - 1.e4 c5 2.Nf3 e6 - Sicilian (323)
          • B40a - 2…e6 (35)
          • B40b - 3.c4 (13)
          • B40c - 3.b3 (50)
          • B40d - 3.b3 Nc6 (10)
          • B40e - 3.g3 (90)
          • B40f - 3.d3 (22)
          • B40g - 3.Nc3 (21)
          • B40h - 3.Nc3 Nc6 (7)
          • B40i - 3.d4 (1)
          • B40j - 3.d4 d5 - Marshall Variation (5)
          • B40k - 3.d4 cxd4 - Open (24)
          • B40l - 3.d4 cxd4 4.Nxd4 d6 - Open (4)
          • B40m - 3.d4 cxd4 4.Nxd4 Bc5 - Open (4)
          • B40n - 3.d4 cxd4 4.Nxd4 Qb6 - Kveinys Variation (7)
          • B40o - 3.d4 cxd4 4.Nxd4 Nf6 - Open (7)
          • B40p - 3.d4 cxd4 4.Nxd4 Nf6 5.Bd3 - Open (0)
          • B40p - 3.d4 cxd4 4.Nxd4 Nf6 5.Bd3 Nc6 - Open (0)
          • B40q - 3.d4 cxd4 4.Nxd4 Nf6 5.Bd3 Nc6 6.Nxc6 - Open (10)
          • B40r - 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 - Open (0)
          • B40s - 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 - Pin Variation (4)
          • B40t - 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Bd3 e5 - Pin Jaffe Variation (0)
          • B40u - 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.e5 - Pin Koch Variation (9)
        • B41 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 - Sicilian (189)
          • B41a - Kan (Paulsen) (53)
          • B41b - 5.g3 - Kan (8)
          • B41c - 5.Be3 - Kan (0)
          • B41d - 5.Be2 - Kan (1)
          • B41e - 5.Be2 Nf6 - Kan (3)
          • B41f - 5.c4 - Kan (7)
          • B41g - 5.c4 Qc7 - Kan (0)
          • B41h - 5.c4 Nf6 - Kan (2)
          • B41i - 5.c4 Nf6 6.Nc3 - Kan (1)
          • B41j - 5.c4 Nf6 6.Nc3 d6 - Kan (6)
          • B41k - 5.c4 Nf6 6.Nc3 Bb4 - Kan (38)
          • B41k - 5.c4 Nf6 6.Nc3 Bb4 7.Bd3 Nc6 8.Bc2 - Kan Bronstein Variation (38)
          • B41l - 5.c4 Nf6 6.Nc3 Qc7 - Kan (22)
          • B41m - 5.c4 Nf6 6.Nc3 Qc7 7.Be2 - Kan (10)
        • B42 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 - Sicilian (264)
          • B42a - Kan, 5.Bd3 (2)
          • B42b - 5…g6 - Kan Swiss Cheese Variation (18)
          • B42c - 5…Qb6 - Kan (0)
          • B42d - 5…Qc7 - Kan (1)
          • B42e - 5…Nc6 - Kan (0)
          • B42f - 5…Bc5 - Kan Polugaevsky Variation (94)
          • B42g - 5…Bc5 6.Nb3 Ba7 - Kan Polugaevsky (32)
          • B42h - 5…Nf6 - Kan (31)
          • B42h - 5…Nf6 6.c4 - Kan (0)
          • B42h - 5…Nf6 6.O-O - Kan (31)
          • B42i - 5…Nf6 6.O-O d6 - Kan (0)
          • B42j - 5…Nf6 6.O-O d6 7.c4 - Kan (1)
          • B42k - 5…Nf6 6.O-O d6 7.c4 g6 - Kan Gipslis Variation (30)
          • B42l - 5…Nf6 6.O-O Qc7 - Kan (0)
          • B42m - 5…Nf6 6.O-O Qc7 7.c4 - Kan (0)
          • B42n - 5…Nf6 6.O-O Qc7 7.Qe2 - Kan (0)
          • B42n - 5…Nf6 6.O-O Qc7 7.Qe2 d6 - Kan (4)
          • B42o - 5…Nf6 6.O-O Qc7 7.Qe2 d6 8.c4 - Kan (20)
        • B43 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 - Sicilian (293)
          • B43a - Kan, 5.Nc3 (143)
          • B43b - 5…d6 - Kan (18)
          • B43c - 5…b5 - Kan (6)
          • B43d - 5…b5 6.Bd3 - Kan (28)
          • B43e - 5…b5 6.Bd3 Qb6 - Kan (15)
          • B43f - 5…b5 6.Bd3 Qb6 7.Nb3 - Kan (12)
          • B43g - 5…Qc7 - Kan (6)
          • B43h - 5…Qc7 6.g3 - Kan (12)
          • B43i - 5…Qc7 6.g3 Nf6 - Kan (3)
          • B43j - 5…Qc7 6.Be2 - Kan (9)
          • B43k - 5…Qc7 6.Be2 Nf6 - Kan (0)
          • B43l - 5…Qc7 6.Be2 Nf6 7.O-O - Kan (3)
          • B43m - 5…Qc7 6.Bd3 - Kan (9)
          • B43n - 5…Qc7 6.Bd3 Nf6 - Kan (18)
          • B43o - 5…Qc7 6.Bd3 Nf6 7.O-O - Kan (11)
        • B44 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 - Sicilian (100)
          • B44a - Taimanov (0)
          • B44b - 5.g3 - Taimanov (3)
          • B44c - 5.Be2 - Taimanov (0)
          • B44d - 5.c4 - Taimanov (0)
          • B44d - 5.c4 Nf6 - Taimanov (2)
          • B44e - 5.c4 Nf6 6.Nc3 - Taimanov (0)
          • B44e - 5.c4 Nf6 6.Nc3 Bb4 - Taimanov (0)
          • B44e - 5.c4 Nf6 6.Nc3 Bb4 7.Nxc6 - Taimanov (3)
          • B44f - 5.c4 Nf6 6.Nc3 Bb4 7.Nxc6 bxc6 - Taimanov (17)
          • B44g - 5.Be3 - Taimanov (0)
          • B44h - 5.Be3 Nf6 - Taimanov (0)
          • B44i - 5.Nxc6 - Taimanov (0)
          • B44j - 5.Nxc6 bxc6 6.Bd3 - Taimanov (1)
          • B44k - 5.Nb5 - Taimanov Szen Variation (0)
          • B44k - 5.Nb5 d6 - Taimanov Szen (0)
          • B44l - 5.Nb5 d6 6.Bf4 - Taimanov Szen (4)
          • B44m - 5.Nb5 d6 6.Bf4 e5 7.Be3 a6 - Taimanov Szen (6)
          • B44n - 5.Nb5 d6 6.Bf4 e5 7.Be3 Nf6 - Taimanov Szen (8)
          • B44o - 5.Nb5 d6 6.c4 - Taimanov Szen (0)
          • B44o - 5.Nb5 d6 6.c4 a6 - Taimanov Szen (0)
          • B44o - 5.Nb5 d6 6.c4 Nf6 - Taimanov Szen (3)
          • B44p - 5.Nb5 d6 6.c4 Nf6 7.N5c3 - Taimanov Szen (9)
          • B44q - 5.Nb5 d6 6.c4 Nf6 7.N1c3 - Taimanov Szen (0)
          • B44q - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 - Taimanov Szen (2)
          • B44r - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 - Taimanov Szen (0)
          • B44r - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 d5 - Taimanov Szen Kasparov Gambit (3)
          • B44s - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 b6 - Taimanov Szen (4)
          • B44t - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 - Taimanov Szen (1)
          • B44u - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 - Taimanov Szen (0)
          • B44u - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 b6 - Taimanov Szen (2)
          • B44v - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 O-O - Taimanov Szen (3)
          • B44w - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 O-O 10.O-O b6 - Taimanov Szen Hedgehog Variation (11)
          • B44x - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 O-O 10.O-O b6 11.Be3 Bd7 - Taimanov Szen Hedgehog (0)
          • B44y - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 O-O 10.O-O b6 11.Be3 Bb7 - Taimanov Szen Hedgehog (7)
          • B44z - 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 O-O 10.O-O b6 11.Be3 Bb7 12.Qb3 - Taimanov Szen Hedgehog (11)
        • B45 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 - Sicilian (310)
          • B45a - Taimanov, 5.Nc3 (3)
          • B45b - 5…Bb4 - Taimanov (1)
          • B45c - 5…d6 - Taimanov (0)
          • B45c - 5…d6 6.g4 - Taimanov (17)
          • B45d - 5…Nf6 - Taimanov Four Knights (152)
          • B45e - 5…Nf6 6.Bg5 - Taimanov Four Knights (1)
          • B45f - 5…Nf6 6.a3 - Taimanov Four Knights (26)
          • B45g - 5…Nf6 6.g3 - Taimanov Four Knights (4)
          • B45h - 5…Nf6 6.Be2 - Taimanov Four Knights (5)
          • B45i - 5…Nf6 6.Be3 - Taimanov Four Knights (0)
          • B45i - 5…Nf6 6.Be3 Bb4 - Taimanov Four Knights (1)
          • B45j - 5…Nf6 6.Be3 Bb4 7.Bd3 - Taimanov Four Knights (0)
          • B45k - 5…Nf6 6.Nxc6 - Taimanov Four Knights (10)
          • B45l - 5…Nf6 6.Nxc6 bxc6 7.e5 - Taimanov Four Knights (8)
          • B45l - 5…Nf6 6.Nxc6 bxc6 7.e5 Nd5 - Taimanov Four Knights (0)
          • B45m - 5…Nf6 6.Nxc6 bxc6 7.e5 Nd5 8.Ne4 - Taimanov Four Knights (23)
          • B45n - 5…Nf6 6.Nxc6 bxc6 7.e5 Nd5 8.Ne4 Qc7 - Taimanov Four Knights (20)
          • B45o - 5…Nf6 6.Ndb5 - Taimanov Four Knights (0)
          • B45o - 5…Nf6 6.Ndb5 d6 - Taimanov Four Knights (0)
          • B45o - 5…Nf6 6.Ndb5 d6 7.Bf4 - Taimanov Four Knights (8)
          • B45p - 5…Nf6 6.Ndb5 Bb4 - Taimanov Four Knights (2)
          • B45q - 5…Nf6 6.Ndb5 Bb4 7.Nd6+ - Taimanov Four Knights American Attack (0)
          • B45r - 5…Nf6 6.Ndb5 Bb4 7.a3 - Taimanov Four Knights (2)
          • B45s - 5…Nf6 6.Ndb5 Bb4 7.a3 Bxc3+ 8.Nxc3 d5 - Taimanov Four Knights (7)
          • B45t - 5…Nf6 6.Ndb5 Bb4 7.a3 Bxc3+ 8.Nxc3 d5 9.exd5 exd5 - Taimanov Four Knights (0)
          • B45u - 5…Nf6 6.Ndb5 Bb4 7.a3 Bxc3+ 8.Nxc3 d5 9.exd5 exd5 10.Bd3 O-O - Taimanov Four Knights (3)
          • B45v - 5…Nf6 6.Ndb5 Bb4 7.a3 Bxc3+ 8.Nxc3 d5 9.exd5 exd5 10.Bd3 O-O 11.O-O d4 - Taimanov Four Knights (5)
          • B45w - 5…Nf6 6.Ndb5 Bb4 7.a3 Bxc3+ 8.Nxc3 d5 9.exd5 exd5 10.Bd3 O-O 11.O-O d4 12.Ne2 - Taimanov Four Knights (12)
        • B46 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 - Sicilian (279)
          • B46a - Taimanov, 5…a6 (148)
          • B46b - 6.f4 - Taimanov (2)
          • B46c - 6.Nxc6 - Taimanov (23)
          • B46d - 6.Nxc6 bxc6 7.Bd3 - Taimanov (15)
          • B46e - 6.Nxc6 bxc6 7.Bd3 d5 - Taimanov (39)
          • B46f - 6.g3 - Taimanov (3)
          • B46g - 6.g3 Nge7 - Taimanov (2)
          • B46h - 6.g3 d6 - Taimanov (4)
          • B46i - 6.Be3 - Taimanov (0)
          • B46j - 6.Be3 d6 - Taimanov (2)
          • B46k - 6.Be3 Nge7 - Taimanov (0)
          • B46l - 6.Be3 Nf6 - Taimanov (21)
          • B46m - 6.Be2 - Taimanov (0)
          • B46n - 6.Be2 Nf6 - Taimanov (1)
          • B46o - 6.Be2 Nge7 - Taimanov (5)
          • B46p - 6.Be2 Nge7 7.O-O - Taimanov (0)
          • B46q - 6.Be2 Nge7 7.Be3 - Taimanov (2)
          • B46r - 6.Be2 d6 - Taimanov (12)
        • B47 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 - Sicilian (138)
          • B47a - Taimanov, Bastrikov Variation (0)
          • B47b - 6.Nxc6 - Taimanov (5)
          • B47c - 6.Ndb5 - Taimanov (4)
          • B47d - 6.f4 - Taimanov (6)
          • B47e - 6.f4 a6 - Taimanov (2)
          • B47f - 6.f4 a6 7.Nxc6 - Taimanov (8)
          • B47g - 6.g3 - Taimanov (3)
          • B47h - 6.g3 a6 - Taimanov (0)
          • B47h - 6.g3 a6 7.Bg2 - Taimanov (4)
          • B47i - 6.g3 a6 7.Bg2 d6 - Taimanov (0)
          • B47i - 6.g3 a6 7.Bg2 d6 8.O-O - Taimanov (5)
          • B47j - 6.g3 a6 7.Bg2 d6 8.O-O Bd7 - Taimanov (8)
          • B47k - 6.g3 a6 7.Bg2 d6 8.O-O Bd7 9.Re1 - Taimanov (4)
          • B47l - 6.g3 a6 7.Bg2 Nf6 - Taimanov (0)
          • B47m - 6.g3 a6 7.Bg2 Nf6 8.O-O - Taimanov (20)
          • B47n - 6.g3 a6 7.Bg2 Nf6 8.O-O Bc5 - Taimanov (4)
          • B47o - 6.g3 a6 7.Bg2 Nf6 8.O-O Be7 - Taimanov (2)
          • B47p - 6.g3 a6 7.Bg2 Nf6 8.O-O Be7 9.Re1 - Taimanov (8)
          • B47q - 6.Be2 - Taimanov (2)
          • B47q - 6.Be2 Nf6 - Taimanov (17)
          • B47r - 6.Be2 a6 - Taimanov (4)
          • B47s - 6.Be2 a6 7.f4 - Taimanov (6)
          • B47t - 6.Be2 a6 7.O-O - Taimanov (0)
          • B47u - 6.Be2 a6 7.O-O b5 - Taimanov (7)
          • B47v - 6.Be2 a6 7.O-O Nf6 - Taimanov (0)
          • B47v - 6.Be2 a6 7.O-O Nf6 8.a3 - Taimanov (1)
          • B47w - 6.Be2 a6 7.O-O Nf6 8.Kh1 - Taimanov (7)
          • B47x - 6.Be2 a6 7.O-O Nf6 8.Kh1 Be7 - Taimanov (0)
          • B47y - 6.Be2 a6 7.O-O Nf6 8.Kh1 Nxd4 - Taimanov (0)
          • B47y - 6.Be2 a6 7.O-O Nf6 8.Kh1 Nxd4 9.Qxd4 Bc5 10.Qd3 - Taimanov (0)
          • B47y - 6.Be2 a6 7.O-O Nf6 8.Kh1 Nxd4 9.Qxd4 Bc5 10.Qd3 b5 - Taimanov (2)
          • B47z - 6.Be2 a6 7.O-O Nf6 8.Kh1 Nxd4 9.Qxd4 Bc5 10.Qd3 b5 11.f4 - Taimanov (9)
        • B48 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 - Sicilian (408)
          • B48a - Taimanov, 6.Be3 (207)
          • B48b - 6…Nf6 - Taimanov (12)
          • B48c - 6…a6 - Taimanov (54)
          • B48d - 6…a6 7.a3 - Taimanov (7)
          • B48e - 6…a6 7.f4 - Taimanov (1)
          • B48f - 6…a6 7.f4 b5 - Taimanov (3)
          • B48g - 6…a6 7.Qd2 - Taimanov (80)
          • B48h - 6…a6 7.Qd2 Nf6 8.f3 - Taimanov (5)
          • B48i - 6…a6 7.Bd3 - Taimanov (1)
          • B48j - 6…a6 7.Bd3 b5 - Taimanov (0)
          • B48k - 6…a6 7.Bd3 b5 8.Nxc6 - Taimanov (5)
          • B48l - 6…a6 7.Bd3 b5 8.O-O - Taimanov (2)
          • B48m - 6…a6 7.Bd3 Nf6 - Taimanov (1)
          • B48n - 6…a6 7.Bd3 Nf6 8.O-O - Taimanov (3)
          • B48o - 6…a6 7.Bd3 Nf6 8.O-O Nxd4 - Taimanov (9)
          • B48p - 6…a6 7.Bd3 Nf6 8.O-O h5 - Taimanov (1)
          • B48q - 6…a6 7.Bd3 Nf6 8.O-O b5 - Taimanov (4)
          • B48r - 6…a6 7.Bd3 Nf6 8.O-O Bd6 - Taimanov (3)
          • B48s - 6…a6 7.Bd3 Nf6 8.O-O Ne5 - Taimanov (2)
          • B48t - 6…a6 7.Bd3 Nf6 8.O-O Ne5 9.h3 - Taimanov (1)
          • B48u - 6…a6 7.Bd3 Nf6 8.O-O Ne5 9.h3 Bc5 - Taimanov (4)
          • B48v - 6…a6 7.Bd3 Nf6 8.O-O Ne5 9.h3 Bc5 10.Kh1 - Taimanov (3)
        • B49 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Be2 - Sicilian (102)
          • B49a - 7…Nge7 - Taimanov (0)
          • B49a - Taimanov, 6.Be3 a6 7.Be2 (51)
          • B49b - 7…b5 - Taimanov (0)
          • B49b - 7…b5 8.Nxc6 - Taimanov (7)
          • B49c - 7…Nf6 - Taimanov (0)
          • B49d - 7…Nf6 8.a3 - Taimanov (0)
          • B49d - 7…Nf6 8.a3 b5 - Taimanov (3)
          • B49e - 7…Nf6 8.a3 Be7 - Taimanov (0)
          • B49e - 7…Nf6 8.a3 Be7 9.O-O - Taimanov (4)
          • B49f - 7…Nf6 8.O-O - Taimanov (0)
          • B49f - 7…Nf6 8.O-O b5 - Taimanov (0)
          • B49g - 7…Nf6 8.O-O Be7 - Taimanov (0)
          • B49h - 7…Nf6 8.O-O Bb4 - Taimanov (0)
          • B49i - 7…Nf6 8.O-O Bb4 9.Nxc6 - Taimanov (1)
          • B49j - 7…Nf6 8.O-O Bb4 9.Na4 - Taimanov (2)
          • B49k - 7…Nf6 8.O-O Bb4 9.Na4 O-O - Taimanov (5)
          • B49l - 7…Nf6 8.O-O Bb4 9.Na4 Be7 - Taimanov (8)
          • B49m - 7…Nf6 8.O-O Bb4 9.Na4 Be7 10.Nxc6 - Taimanov (0)
          • B49m - 7…Nf6 8.O-O Bb4 9.Na4 Be7 10.Nxc6 bxc6 - Taimanov (3)
          • B49n - 7…Nf6 8.O-O Bb4 9.Na4 Be7 10.Nxc6 bxc6 11.Nb6 - Taimanov (18)
      • B50-B59 Sicilian 1. e4 c5 2. Nf3 d6 (1347)
        • B50 - 1.e4 c5 2.Nf3 d6 - Sicilian (504)
          • B50a - 2.Nf3 d6 (0)
          • B50b - 3.b4 - Wing Gambit deferred (3)
          • B50c - 3.b3 (1)
          • B50d - 3.b3 e6 (11)
          • B50e - 3.d3 (0)
          • B50f - 3.g3 (19)
          • B50g - 3.Bc4 (16)
          • B50h - 3.Bc4 Nf6 4.d3 (27)
          • B50i - 3.Nc3 (11)
          • B50j - 3.Nc3 e6 (5)
          • B50k - 3.Nc3 Nf6 (53)
          • B50l - 3.c3 (243)
          • B50m - 3.c3 Nf6 (4)
          • B50n - 3.c3 Nf6 4.h3 (11)
          • B50o - 3.c3 Nf6 4.h3 Nc6 (4)
          • B50p - 3.c3 Nf6 4.Bc4 (0)
          • B50q - 3.c3 Nf6 4.Bd3 (9)
          • B50r - 3.c3 Nf6 4.Bd3 Nc6 (8)
          • B50s - 3.c3 Nf6 4.Be2 (28)
          • B50t - 3.c3 Nf6 4.Be2 Nc6 (5)
          • B50u - 3.c3 Nf6 4.Be2 Nbd7 (8)
          • B50v - 3.c3 Nf6 4.Be2 g6 (9)
          • B50w - 3.c3 Nf6 4.Be2 g6 5.O-O Bg7 6.Bb5+ - Torre Variation (29)
        • B51 - 1.e4 c5 2.Nf3 d6 3.Bb5+ - Sicilian (463)
          • B51a - 3…Nd7 - Moscow (40)
          • B51a - Moscow (0)
          • B51b - 3…Nd7 4.c3 - Moscow (48)
          • B51c - 3…Nd7 4.O-O - Moscow (95)
          • B51d - 3…Nd7 4.O-O Nf6 - Moscow (11)
          • B51e - 3…Nd7 4.O-O Nf6 5.Re1 a6 6.Bf1 - Moscow (14)
          • B51f - 3…Nd7 4.d4 - Moscow (9)
          • B51f - 3…Nd7 4.d4 cxd4 - Moscow (92)
          • B51g - 3…Nd7 4.d4 Nf6 - Moscow (5)
          • B51h - 3…Nd7 4.d4 Nf6 5.Nc3 - Moscow (5)
          • B51i - 3…Nd7 4.d4 Nf6 5.Nc3 cxd4 - Moscow (0)
          • B51i - 3…Nd7 4.d4 Nf6 5.Nc3 cxd4 6.Qxd4 - Moscow (5)
          • B51j - 3…Nd7 4.d4 Nf6 5.Nc3 cxd4 6.Qxd4 e5 - Moscow (10)
          • B51k - 3…Nc6 - Moscow (11)
          • B51l - 3…Nc6 4.Bxc6+ - Moscow (15)
          • B51m - 3…Nc6 4.O-O - Moscow (3)
          • B51n - 3…Nc6 4.O-O Bd7 - Moscow (7)
          • B51o - 3…Nc6 4.O-O Bd7 5.Re1 - Moscow (0)
          • B51p - 3…Nc6 4.O-O Bd7 5.Re1 a6 - Moscow (8)
          • B51q - 3…Nc6 4.O-O Bd7 5.Re1 Nf6 - Moscow (15)
          • B51r - 3…Nc6 4.O-O Bd7 5.Re1 Nf6 6.c3 - Moscow (4)
          • B51s - 3…Nc6 4.O-O Bd7 5.Re1 Nf6 6.c3 a6 7.Ba4 - Moscow (7)
          • B51t - 3…Nc6 4.O-O Bd7 5.Re1 Nf6 6.c3 a6 7.Bf1 - Moscow (36)
          • B51u - 3…Nc6 4.O-O Bd7 5.Re1 Nf6 6.c3 a6 7.Bf1 Bg4 8.h3 - Moscow (23)
        • B52 - 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 - Sicilian (295)
          • B52a - Moscow 3…Bd7 (53)
          • B52b - 4.Bxd7+ Nxd7 - Moscow (14)
          • B52c - 4.Bxd7+ Nxd7 5.O-O - Moscow (8)
          • B52d - 4.Bxd7+ Nxd7 5.O-O Ngf6 - Moscow (15)
          • B52e - 4.Bxd7+ Nxd7 5.O-O Ngf6 6.Qe2 - Moscow (25)
          • B52f - 4.Bxd7+ Qxd7 - Moscow (1)
          • B52g - 4.Bxd7+ Qxd7 5.c4 - Sokolsky Variation (78)
          • B52h - 4.Bxd7+ Qxd7 5.c4 Nc6 - Sokolsky (7)
          • B52i - 4.Bxd7+ Qxd7 5.c4 Nc6 6.O-O - Sokolsky (4)
          • B52j - 4.Bxd7+ Qxd7 5.c4 Nc6 6.O-O Nf6 - Sokolsky (0)
          • B52k - 4.Bxd7+ Qxd7 5.c4 Nc6 6.Nc3 - Sokolsky (10)
          • B52l - 4.Bxd7+ Qxd7 5.c4 Nc6 6.Nc3 Nf6 - Sokolsky (12)
          • B52m - 4.Bxd7+ Qxd7 5.c4 Nc6 6.Nc3 Nf6 7.O-O - Sokolsky (12)
          • B52n - 4.Bxd7+ Qxd7 5.O-O (42)
          • B52o - 4.Bxd7+ Qxd7 5.O-O Nc6 (18)
          • B52p - 4.Bxd7+ Qxd7 5.O-O Nc6 6.Re1 (0)
          • B52q - 4.Bxd7+ Qxd7 5.O-O Nc6 6.Re1 Nf6 (12)
          • B52r - 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 (19)
          • B52s - 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 Nf6 (4)
          • B52t - 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 Nf6 7.d4 - Bronstein Gambit (14)
        • B53 - 1.e4 c5 2.Nf3 d6 3.d4 - Sicilian (257)
          • B53a - 2…d6 3.d4 (0)
          • B53b - 3…Nf6 (0)
          • B53c - 3…cxd4 (129)
          • B53e - 3…cxd4 4.Qxd4 Bd7 - Chekhover (4)
          • B53f - 3…cxd4 4.Qxd4 a6 - Chekhover (5)
          • B53g - 3…cxd4 4.Qxd4 a6 5.Be3 - Chekhover (3)
          • B53h - 3…cxd4 4.Qxd4 a6 5.c4 - Chekhover (9)
          • B53i - 3…cxd4 4.Qxd4 a6 5.c4 Nc6 6.Qd2 - Chekhover (0)
          • B53j - 3…cxd4 4.Qxd4 a6 5.c4 Nc6 6.Qd2 g6 - Chekhover (1)
          • B53k - 3…cxd4 4.Qxd4 Nf6 - Chekhover (4)
          • B53k - 3…cxd4 4.Qxd4 Nf6 5.Nc3 - Chekhover (34)
          • B53l - 3…cxd4 4.Qxd4 Nc6 - Chekhover (23)
          • B53m - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Qd7 - Chekhover Zaitsev Variation (1)
          • B53n - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 - Chekhover (13)
          • B53o - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 - Chekhover (0)
          • B53p - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.c4 - Chekhover (1)
          • B53q - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.c4 Nf6 8.Nc3 g6 - Chekhover (1)
          • B53r - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.Nc3 - Chekhover (1)
          • B53s - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.Nc3 Nf6 8.Bg5 - Chekhover (0)
          • B53t - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.Nc3 Nf6 8.Bg5 e6 - Chekhover (4)
          • B53u - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.Nc3 Nf6 8.Bg5 e6 9.O-O-O Be7 10.Qd3 - Chekhover Main Line (7)
          • B53v - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.Nc3 Nf6 8.Bg5 e6 9.O-O-O Be7 10.Rhe1 - Chekhover Main Line (4)
          • B53w - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.Nc3 Nf6 8.Bg5 e6 9.O-O-O Be7 10.Rhe1 O-O - Chekhover Main Line (13)
          • B53x - 3…cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.Nc3 Nf6 8.Bg5 e6 9.O-O-O Be7 10.Rhe1 O-O 11.Qd2 - Chekhover Main Line (0)
        • B54 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 - Sicilian (56)
          • B54a - Open, 2…d6 (0)
          • B54b - 4…e5 - Open (0)
          • B54c - 4…a6 - Open (1)
          • B54d - 4…Nf6 - Open (12)
          • B54e - 4…Nf6 5.Bd3 - Open (9)
          • B54f - 4…Nf6 5.f3 - Prins (Moscow) Variation (5)
          • B54g - 4…Nf6 5.f3 e6 - Prins (Moscow) (3)
          • B54h - 4…Nf6 5.f3 a6 - Prins (Moscow) (2)
          • B54i - 4…Nf6 5.f3 Nc6 - Prins (Moscow) (3)
          • B54j - 4…Nf6 5.f3 Nc6 6.c4 Nxd4 - Prins (Moscow) (1)
          • B54k - 4…Nf6 5.f3 Nc6 6.c4 Qb6 - Prins (Moscow) (1)
          • B54l - 4…Nf6 5.f3 e5 - Prins (Moscow) (0)
          • B54m - 4…Nf6 5.f3 e5 6.Nb3 - Prins (Moscow) (8)
          • B54n - 4…Nf6 5.f3 e5 6.Nb3 Be6 - Prins (Moscow) (5)
          • B54o - 4…Nf6 5.f3 e5 6.Nb3 d5 - Prins (Moscow) (6)
        • B55 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Bb5+ - Sicilian (1)
        • B56 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 - Sicilian (132)
          • B56a - Open, 2…d6, 5.Nc3 (0)
          • B56b - 5…e5 - Open (2)
          • B56c - 5…e5 6.Bb5+ - Venice Attack (4)
          • B56d - 5…Nbd7 - Open (3)
          • B56e - 5…Nbd7 6.Bc4 - Open (0)
          • B56f - 5…Bd7 - Open (5)
          • B56g - 5…Bd7 6.Bg5 - Open (7)
          • B56h - 5…Nc6 - Open (67)
          • B56i - 5…Nc6 6.h3 - Open (12)
          • B56j - 5…Nc6 6.g3 - Open (2)
          • B56k - 5…Nc6 6.f4 - Open (1)
          • B56l - 5…Nc6 6.f3 - Open (2)
          • B56m - 5…Nc6 6.f3 e5 - Open (0)
          • B56m - 5…Nc6 6.f3 e5 7.Nb3 - Open (4)
          • B56n - 5…Nc6 6.f3 e5 7.Nb3 Be7 - Open (18)
          • B56o - 5…Nc6 6.Be3 - Open (0)
          • B56p - 5…Nc6 6.Be3 e5 - Open (4)
          • B56q - 5…Nc6 6.Be3 Ng4 - Open (1)
          • B56r - 5…Nc6 6.Be3 Ng4 7.Bb5 - Open (0)
        • B57 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 - Sicilian (40)
          • B57a - 6…g6 7.Nxc6 bxc6 8.e5 - Sozin Magnus Smith Trap (1)
          • B57a - Sozin (1)
          • B57b - 6…Bd7 - Sozin (3)
          • B57c - 6…Bd7 7.O-O - Sozin (3)
          • B57d - 6…Qb6 - Sozin Benko Variation (0)
          • B57e - 6…Qb6 7.Nde2 - Sozin Benko (3)
          • B57f - 6…Qb6 7.Ndb5 - Sozin Benko (6)
          • B57g - 6…Qb6 7.Nxc6 - Sozin Benko (1)
          • B57h - 6…Qb6 7.Nxc6 bxc6 8.O-O g6 - Sozin Benko (3)
          • B57i - 6…Qb6 7.Nb3 - Sozin Benko (0)
          • B57j - 6…Qb6 7.Nb3 e6 - Sozin Benko (2)
          • B57k - 6…Qb6 7.Nb3 e6 8.Be3 - Sozin Benko (3)
          • B57l - 6…Qb6 7.Nb3 e6 8.Bf4 - Sozin Benko (10)
          • B57m - 6…Qb6 7.Nb3 e6 8.O-O - Sozin Benko (2)
          • B57n - 6…Qb6 7.Nb3 e6 8.O-O Be7 - Sozin Benko (0)
          • B57o - 6…Qb6 7.Nb3 e6 8.O-O Be7 9.Be3 - Sozin Benko (2)
        • B58 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 - Sicilian (40)
          • B58a - Boleslavsky Variation (0)
          • B58b - 6…Bd7 - Boleslavsky (5)
          • B58c - 6…a6 - Boleslavsky (1)
          • B58d - 6…Nxd4 - Boleslavsky (0)
          • B58e - 6…e5 - Boleslavsky (20)
          • B58f - 6…e5 7.Ndb5 - Boleslavsky (0)
          • B58g - 6…e5 7.Nxc6 - Boleslavsky Louma Variation (0)
          • B58g - 6…e5 7.Nxc6 bxc6 - Boleslavsky Louma Variation (1)
          • B58h - 6…e5 7.Nf3 - Boleslavsky (0)
          • B58i - 6…e5 7.Nf3 h6 - Boleslavsky (0)
          • B58j - 6…e5 7.Nf3 h6 8.O-O - Boleslavsky (2)
          • B58k - 6…e5 7.Nf3 h6 8.O-O Be7 - Boleslavsky (0)
          • B58l - 6…e5 7.Nf3 h6 8.O-O Be7 9.h3 - Boleslavsky (0)
          • B58m - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 - Boleslavsky (1)
          • B58n - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 O-O 10.h3 - Boleslavsky (1)
          • B58o - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 O-O 10.h3 a6 - Boleslavsky (0)
          • B58p - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 O-O 10.h3 Be6 - Boleslavsky (0)
          • B58p - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 O-O 10.h3 Be6 11.Bf1 - Boleslavsky (4)
          • B58q - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 O-O 10.h3 Be6 11.Bf1 Qa5 - Boleslavsky (3)
          • B58r - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 O-O 10.h3 Be6 11.Bf1 Nb8 - Boleslavsky (1)
          • B58s - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 O-O 10.h3 Be6 11.Bf1 Nb8 12.a4 - Boleslavsky (1)
          • B58t - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 O-O 10.h3 Be6 11.Bf1 Nb8 12.b3 - Boleslavsky (0)
          • B58u - 6…e5 7.Nf3 h6 8.O-O Be7 9.Re1 O-O 10.h3 Be6 11.Bf1 Nb8 12.b3 a6 - Boleslavsky (0)
        • B59 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3 - Sicilian (24)
          • B59a - Boleslavsky, 7.Nb3 (12)
          • B59b - 7…Be6 - Boleslavsky (0)
          • B59c - 7…Be7 - Boleslavsky (0)
          • B59d - 7…Be7 8.Bg5 - Boleslavsky (2)
          • B59e - 7…Be7 8.Be3 - Boleslavsky (0)
          • B59f - 7…Be7 8.O-O - Boleslavsky (0)
          • B59g - 7…Be7 8.O-O O-O - Boleslavsky (2)
          • B59h - 7…Be7 8.O-O O-O 9.Bg5 - Boleslavsky (0)
          • B59i - 7…Be7 8.O-O O-O 9.Kh1 - Boleslavsky (2)
          • B59j - 7…Be7 8.O-O O-O 9.f4 - Boleslavsky (1)
          • B59k - 7…Be7 8.O-O O-O 9.Be3 - Boleslavsky (0)
          • B59l - 7…Be7 8.O-O O-O 9.Be3 Be6 - Boleslavsky (1)
          • B59m - 7…Be7 8.O-O O-O 9.Be3 Be6 10.Bf3 - Boleslavsky (2)
          • B59n - 7…Be7 8.O-O O-O 9.Be3 a5 - Boleslavsky (2)
          • B59o - 7…Be7 8.O-O O-O 9.Be3 a5 10.a4 - Boleslavsky (0)
      • B60-B69 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Sicilian, Richter-Rauzer (368)
        • B60 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 - Sicilian (35)
          • B60a - Richter-Rauzer (13)
          • B60b - 6…g6 - Richter-Rauzer Bondarevsky Variation (5)
          • B60c - 6…Qa5 - Richter-Rauzer (0)
          • B60d - 6…Qb6 - Richter-Rauzer (4)
          • B60e - 6…a6 - Richter-Rauzer (4)
          • B60f - 6…Bd7 - Richter-Rauzer Larsen Variation (4)
          • B60g - 6…Bd7 7.Nb3 - Richter-Rauzer Larsen (0)
          • B60h - 6…Bd7 7.Bxf6 - Richter-Rauzer Larsen (1)
          • B60i - 6…Bd7 7.Be2 - Richter-Rauzer Larsen (1)
          • B60j - 6…Bd7 7.Be2 a6 - Richter-Rauzer Larsen (0)
          • B60k - 6…Bd7 7.Be2 Qa5 - Richter-Rauzer Larsen (3)
        • B61 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 Bd7 7.Qd2 - Sicilian (37)
          • B61a - Richter-Rauzer, Larsen, 7.Qd2 (19)
          • B61b - 7…a6 - Richter-Rauzer Larsen (1)
          • B61c - 7…Nxd4 - Richter-Rauzer Larsen (2)
          • B61d - 7…Rc8 - Richter-Rauzer Larsen (4)
          • B61e - 7…Rc8 8.f4 - Richter-Rauzer Larsen (3)
          • B61f - 7…Rc8 8.O-O-O - Richter-Rauzer Larsen (0)
          • B61g - 7…Rc8 8.O-O-O Nxd4 9.Qxd4 Qa5 - Richter-Rauzer Larsen Main Line (1)
          • B61h - 7…Rc8 8.O-O-O Nxd4 9.Qxd4 Qa5 10.Bd2 - Richter-Rauzer Larsen Main Line (4)
          • B61i - 7…Rc8 8.O-O-O Nxd4 9.Qxd4 Qa5 10.f4 - Richter-Rauzer Larsen Main Line (3)
        • B62 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 - Sicilian (28)
          • B62a - Richter-Rauzer, 6…e6 (9)
          • B62b - 7.Be2 - Richter-Rauzer (0)
          • B62c - 7.Be2 Be7 - Richter-Rauzer (1)
          • B62d - 7.Nb3 - Richter-Rauzer Podebrady Variation (0)
          • B62e - 7.Nxc6 - Richter-Rauzer Richter Attack (0)
          • B62f - 7.Qd3 - Richter-Rauzer Keres Variation (10)
          • B62g - 7.Bb5 - Richter-Rauzer Margate (Alekhine) Variation (2)
          • B62h - 7.Bb5 Bd7 - Richter-Rauzer Margate (4)
          • B62i - 7.Bb5 Bd7 8.Bxc6 - Richter-Rauzer Margate (2)
        • B63 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 - Sicilian (32)
          • B63a - Richter-Rauzer, Rauzer Attack (7.Qd2) (0)
          • B63b - 7…Nxd4 - Richter-Rauzer (1)
          • B63c - 7…Qb6 - Richter-Rauzer (3)
          • B63d - 7…Qb6 8.Nb3 - Richter-Rauzer (0)
          • B63e - 7…Qb6 8.Nb3 a6 - Richter-Rauzer (0)
          • B63f - 7…Qb6 8.Nb3 a6 9.O-O-O - Richter-Rauzer (0)
          • B63g - 7…Qb6 8.Nb3 a6 9.O-O-O Be7 - Richter-Rauzer (1)
          • B63h - 7…h6 - Richter-Rauzer (0)
          • B63i - 7…h6 8.Bxf6 gxf6 9.O-O-O a6 - Richter-Rauzer (1)
          • B63j - 7…h6 8.Bxf6 gxf6 9.O-O-O a6 10.f4 - Richter-Rauzer (0)
          • B63k - 7…Be7 - Richter-Rauzer (0)
          • B63l - 7…Be7 8.O-O-O - Richter-Rauzer (1)
          • B63m - 7…Be7 8.O-O-O Nxd4 - Richter-Rauzer (0)
          • B63m - 7…Be7 8.O-O-O Nxd4 9.Qxd4 - Richter-Rauzer (0)
          • B63n - 7…Be7 8.O-O-O Nxd4 9.Qxd4 O-O - Richter-Rauzer (3)
          • B63o - 7…Be7 8.O-O-O O-O - Richter-Rauzer (2)
          • B63p - 7…Be7 8.O-O-O O-O 9.f3 - Richter-Rauzer (2)
          • B63q - 7…Be7 8.O-O-O O-O 9.Nb3 - Richter-Rauzer (2)
          • B63r - 7…Be7 8.O-O-O O-O 9.Nb3 a5 - Richter-Rauzer (3)
          • B63s - 7…Be7 8.O-O-O O-O 9.Nb3 a6 - Richter-Rauzer (2)
          • B63t - 7…Be7 8.O-O-O O-O 9.Nb3 Qb6 - Richter-Rauzer Podebrad Variation (1)
          • B63u - 7…Be7 8.O-O-O O-O 9.Nb3 Qb6 10.f3 - Richter-Rauzer Podebrad (2)
          • B63v - 7…Be7 8.O-O-O O-O 9.Nb3 Qb6 10.f3 Rd8 - Richter-Rauzer Podebrad (2)
          • B63w - 7…Be7 8.O-O-O O-O 9.Nb3 Qb6 10.f3 Rd8 11.Kb1 - Richter-Rauzer Podebrad (6)
        • B64 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4 - Sicilian (40)
          • B64a - Richter-Rauzer, 7.Qd2 Be7, 9.f4 (0)
          • B64b - 9…e5 - Richter-Rauzer Geller Variation (20)
          • B64c - 9…h6 - Richter-Rauzer (3)
          • B64d - 9…h6 10.Bh4 - Richter-Rauzer (6)
          • B64e - 9…h6 10.Bh4 Bd7 - Richter-Rauzer (2)
          • B64f - 9…h6 10.Bh4 e5 - Richter-Rauzer (9)
        • B65 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4 Nxd4 - Sicilian (54)
          • B65a - 10.Qxd4 - Richter-Rauzer (27)
          • B65b - 10.Qxd4 h6 - Richter-Rauzer (2)
          • B65c - 10.Qxd4 Qa5 - Richter-Rauzer (2)
          • B65d - 10.Qxd4 Qa5 11.Kb1 - Richter-Rauzer (6)
          • B65e - 10.Qxd4 Qa5 11.Bc4 - Richter-Rauzer (0)
          • B65f - 10.Qxd4 Qa5 11.Bc4 Bd7 - Richter-Rauzer (4)
          • B65g - 10.Qxd4 Qa5 11.Bc4 Bd7 12.e5 - Richter-Rauzer (13)
        • B66 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 - Sicilian (212)
          • B66a - Richter-Rauzer, 7…a6 (109)
          • B66b - 8.Be2 - Richter-Rauzer (1)
          • B66c - 8.O-O-O - Richter-Rauzer (2)
          • B66d - 8.O-O-O Be7 - Richter-Rauzer (8)
          • B66e - 8.O-O-O Nxd4 - Richter-Rauzer (0)
          • B66e - 8.O-O-O Nxd4 9.Qxd4 - Richter-Rauzer (0)
          • B66e - 8.O-O-O Nxd4 9.Qxd4 Be7 - Richter-Rauzer (11)
          • B66f - 8.O-O-O h6 - Richter-Rauzer (8)
          • B66g - 8.O-O-O h6 9.Bf4 - Richter-Rauzer (4)
          • B66h - 8.O-O-O h6 9.Bf4 Bd7 10.Nxc6 Bxc6 11.f3 - Richter-Rauzer (9)
          • B66i - 8.O-O-O h6 9.Be3 - Richter-Rauzer (9)
          • B66j - 8.O-O-O h6 9.Be3 Qc7 - Richter-Rauzer (5)
          • B66k - 8.O-O-O h6 9.Be3 Bd7 - Richter-Rauzer (7)
          • B66l - 8.O-O-O h6 9.Be3 Bd7 10.f3 - Richter-Rauzer (12)
          • B66m - 8.O-O-O h6 9.Be3 Be7 - Richter-Rauzer (0)
          • B66m - 8.O-O-O h6 9.Be3 Be7 10.f3 - Richter-Rauzer (0)
          • B66m - 8.O-O-O h6 9.Be3 Be7 10.f3 Nxd4 - Richter-Rauzer (2)
          • B66n - 8.O-O-O h6 9.Be3 Be7 10.f3 Nxd4 11.Bxd4 - Richter-Rauzer (5)
          • B66o - 8.O-O-O h6 9.Be3 Be7 10.f4 - Richter-Rauzer (2)
          • B66p - 8.O-O-O h6 9.Be3 Be7 10.f4 Nxd4 - Richter-Rauzer (18)
        • B67 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 - Sicilian (167)
          • B67a - Richter-Rauzer, 7…a6 8.O-O-O Bd7 (90)
          • B67b - 9.Be2 - Richter-Rauzer (0)
          • B67c - 9.f3 - Richter-Rauzer (14)
          • B67d - 9.f3 Rc8 - Richter-Rauzer (2)
          • B67e - 9.f3 Be7 - Richter-Rauzer (8)
          • B67f - 9.f3 Be7 10.h4 - Richter-Rauzer (5)
          • B67g - 9.f4 - Richter-Rauzer (0)
          • B67h - 9.f4 h6 - Richter-Rauzer (4)
          • B67i - 9.f4 h6 10.Bh4 - Richter-Rauzer (5)
          • B67j - 9.f4 h6 10.Bh4 g5 - Richter-Rauzer (2)
          • B67k - 9.f4 b5 - Richter-Rauzer (1)
          • B67l - 9.f4 b5 10.Nxc6 - Richter-Rauzer (2)
          • B67m - 9.f4 b5 10.Bxf6 - Richter-Rauzer (0)
          • B67m - 9.f4 b5 10.Bxf6 gxf6 - Richter-Rauzer (0)
          • B67n - 9.f4 b5 10.Bxf6 gxf6 11.f5 - Richter-Rauzer (6)
          • B67o - 9.f4 b5 10.Bxf6 gxf6 11.Nxc6 - Richter-Rauzer (6)
          • B67p - 9.f4 b5 10.Bxf6 gxf6 11.Nxc6 Bxc6 12.Qe1 - Richter-Rauzer (3)
          • B67q - 9.f4 b5 10.Bxf6 gxf6 11.Kb1 - Richter-Rauzer (4)
          • B67r - 9.f4 b5 10.Bxf6 gxf6 11.Kb1 Qb6 - Richter-Rauzer (7)
          • B67s - 9.f4 b5 10.Bxf6 gxf6 11.Kb1 Qb6 12.Nxc6 - Richter-Rauzer (8)
        • B68 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.f4 Be7 - Sicilian (8)
        • B69 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.f4 Be7 10.Nf3 b5 11.Bxf6 - Sicilian (19)
      • B70-B79 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 Sicilian, dragon variation (305)
        • B70 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 - Sicilian (101)
          • B70a - 6.f3 - Dragon (2)
          • B70a - Dragon (0)
          • B70b - 6.g3 - Dragon (9)
          • B70c - 6.g3 Nc6 - Dragon (0)
          • B70c - 6.g3 Nc6 7.Bg2 - Dragon (15)
          • B70d - 6.g3 Nc6 7.Nde2 - Dragon (8)
          • B70e - 6.Bg5 - Dragon (0)
          • B70e - 6.Bg5 Bg7 - Dragon (2)
          • B70f - 6.Bc4 - Dragon (0)
          • B70f - 6.Bc4 Bg7 - Dragon (0)
          • B70g - 6.Bc4 Bg7 7.h3 - Dragon (1)
          • B70h - 6.Bc4 Bg7 7.O-O - Dragon (5)
          • B70i - 6.Be2 - Dragon (0)
          • B70i - 6.Be2 Nc6 - Dragon (2)
          • B70j - 6.Be2 a6 - Dragon (2)
          • B70j - 6.Be2 a6 7.a4 Bg7 - Dragon (28)
          • B70k - 6.Be2 Bg7 - Dragon (1)
          • B70l - 6.Be2 Bg7 7.O-O - Dragon (0)
          • B70l - 6.Be2 Bg7 7.O-O Nc6 - Dragon (0)
          • B70m - 6.Be2 Bg7 7.O-O Nc6 8.Nb3 - Dragon (0)
          • B70n - 6.Be2 Bg7 7.O-O Nc6 8.Nb3 O-O - Dragon (1)
          • B70o - 6.Be2 Bg7 7.O-O O-O - Dragon (2)
          • B70p - 6.Be2 Bg7 7.O-O O-O 8.Re1 - Dragon (0)
          • B70p - 6.Be2 Bg7 7.O-O O-O 8.Re1 Nc6 - Dragon (0)
          • B70q - 6.Be2 Bg7 7.O-O O-O 8.Re1 Nc6 9.Nb3 - Dragon (2)
          • B70r - 6.Be2 Bg7 7.O-O O-O 8.Re1 Nc6 9.Nb3 Be6 - Dragon (6)
          • B70s - 6.Be2 Bg7 7.O-O O-O 8.Bg5 - Dragon (0)
          • B70s - 6.Be2 Bg7 7.O-O O-O 8.Bg5 Nc6 - Dragon (0)
          • B70t - 6.Be2 Bg7 7.O-O O-O 8.Bg5 Nc6 9.Nb3 - Dragon (2)
          • B70u - 6.Be2 Bg7 7.O-O O-O 8.Bg5 Nc6 9.Nb3 a6 - Dragon (5)
          • B70v - 6.Be2 Bg7 7.O-O O-O 8.Bg5 Nc6 9.Nb3 Be6 - Dragon (3)
          • B70w - 6.Be2 Bg7 7.O-O O-O 8.Bg5 Nc6 9.Nb3 Be6 10.Kh1 - Dragon (5)
        • B71 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4 - Sicilian (3)
        • B72 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 - Sicilian (14)
          • B72 - 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. Qd2 O-O 9. O-O-O - Sicilian Defense: Dragon Variation, Classical Variation, Grigoriev Variation (1)
        • B73 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O - Sicilian (14)
        • B74 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 - Sicilian (8)
        • B75 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 - Sicilian (10)
        • B76 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O - Sicilian (68)
          • B76a - Dragon, Yugoslav, 7.f3 O-O (0)
          • B76b - 8.Qd2 - Dragon Yugoslav (0)
          • B76c - 8.Qd2 Nc6 - Dragon Yugoslav (0)
          • B76d - 8.Qd2 Nc6 9.g4 - Dragon Yugoslav (0)
          • B76e - 8.Qd2 Nc6 9.g4 Be6 - Dragon Yugoslav (6)
          • B76f - 8.Qd2 Nc6 9.g4 Nxd4 - Dragon Yugoslav (2)
          • B76g - 8.Qd2 Nc6 9.O-O-O - Dragon Yugoslav (2)
          • B76h - 8.Qd2 Nc6 9.O-O-O Bd7 - Dragon Yugoslav (0)
          • B76i - 8.Qd2 Nc6 9.O-O-O Bd7 10.g4 - Dragon Yugoslav (2)
          • B76j - 8.Qd2 Nc6 9.O-O-O Nxd4 - Dragon Yugoslav (0)
          • B76k - 8.Qd2 Nc6 9.O-O-O Nxd4 10.Bxd4 Be6 - Dragon Yugoslav (0)
          • B76l - 8.Qd2 Nc6 9.O-O-O Nxd4 10.Bxd4 Be6 11.Kb1 - Dragon Yugoslav Nxd4: (0)
          • B76m - 8.Qd2 Nc6 9.O-O-O Nxd4 10.Bxd4 Be6 11.Kb1 Qc7 - Dragon Yugoslav Nxd4: (2)
          • B76n - 8.Qd2 Nc6 9.O-O-O Nxd4 10.Bxd4 Be6 11.Kb1 Qc7 12.g4 - Dragon Yugoslav Nxd4: (2)
          • B76o - 8.Qd2 Nc6 9.O-O-O d5 - Dragon Yugoslav (15)
          • B76p - 8.Qd2 Nc6 9.O-O-O d5 10.Qe1 - Dragon Yugoslav (13)
          • B76q - 8.Qd2 Nc6 9.O-O-O d5 10.exd5 - Dragon Yugoslav (0)
          • B76q - 8.Qd2 Nc6 9.O-O-O d5 10.exd5 Nxd5 11.Nxc6 - Dragon Yugoslav (0)
          • B76r - 8.Qd2 Nc6 9.O-O-O d5 10.exd5 Nxd5 11.Nxc6 bxc6 12.Nxd5 - Dragon Yugoslav d5: (2)
          • B76s - 8.Qd2 Nc6 9.O-O-O d5 10.exd5 Nxd5 11.Nxc6 bxc6 12.Bd4 - Dragon Yugoslav d5: (14)
          • B76t - 8.Qd2 Nc6 9.O-O-O d5 10.exd5 Nxd5 11.Nxc6 bxc6 12.Bd4 e5 - Dragon Yugoslav d5: (3)
          • B76u - 8.Qd2 Nc6 9.O-O-O d5 10.exd5 Nxd5 11.Nxc6 bxc6 12.Bd4 e5 13.Bc5 Be6 - Dragon Yugoslav d5: (5)
        • B77 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 - Sicilian (29)
          • B77a - Dragon, Yugoslav, 9.Bc4 (0)
          • B77b - 9…a5 - Dragon Yugoslav Byrne Variation (0)
          • B77c - 9…Ne5 - Dragon Yugoslav (0)
          • B77d - 9…Nd7 - Dragon Yugoslav (2)
          • B77e - 9…Nxd4 - Dragon Yugoslav (4)
          • B77f - 9…Bd7 - Dragon Yugoslav (0)
          • B77g - 9…Bd7 10.Bb3 - Dragon Yugoslav (21)
          • B77h - 9…Bd7 10.g4 - Dragon Yugoslav (0)
          • B77i - 9…Bd7 10.h4 - Dragon Yugoslav (2)
          • B77j - 9…Bd7 10.h4 Rc8 - Dragon Yugoslav (0)
        • B78 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Bd7 10.O-O-O - Sicilian (45)
          • B78a - Dragon, Yugoslav, 10.O-O-O (0)
          • B78b - 10…Ne5 - Dragon Yugoslav (0)
          • B78c - 10…Rc8 - Dragon Yugoslav (0)
          • B78c - 10…Rc8 11.Bb3 - Dragon Yugoslav (7)
          • B78d - 10…Rc8 11.Bb3 Ne5 - Dragon Yugoslav Modern Main Line (2)
          • B78e - 10…Rc8 11.Bb3 Ne5 12.Kb1 - Dragon Yugoslav Main Line (0)
          • B78e - 10…Rc8 11.Bb3 Ne5 12.Kb1 Nc4 13.Bxc4 Rxc4 - Dragon Yugoslav Main Line (8)
          • B78f - 10…Rc8 11.Bb3 Ne5 12.Kb1 Nc4 13.Bxc4 Rxc4 14.g4 b5 - Dragon Yugoslav Main Line (2)
          • B78g - 10…Rc8 11.Bb3 Ne5 12.h4 - Dragon Yugoslav Main Line (0)
          • B78g - 10…Rc8 11.Bb3 Ne5 12.h4 Nc4 - Dragon Yugoslav Main Line (1)
          • B78h - 10…Rc8 11.Bb3 Ne5 12.h4 Nc4 13.Bxc4 Rxc4 14.g4 - Dragon Yugoslav Main Line Nc4: (0)
          • B78i - 10…Rc8 11.Bb3 Ne5 12.h4 Nc4 13.Bxc4 Rxc4 14.h5 - Dragon Yugoslav Main Line Nc4: (2)
          • B78j - 10…Rc8 11.Bb3 Ne5 12.h4 h5 - Dragon Yugoslav Main Line (2)
          • B78k - 10…Rc8 11.Bb3 Ne5 12.h4 h5 13.Kb1 - Dragon Yugoslav Main Line (5)
          • B78l - 10…Rc8 11.Bb3 Ne5 12.h4 h5 13.Bh6 - Dragon Yugoslav Main Line (0)
          • B78m - 10…Rc8 11.Bb3 Ne5 12.h4 h5 13.Bh6 Bxh6 - Dragon Yugoslav Main Line (2)
          • B78n - 10…Rc8 11.Bb3 Ne5 12.h4 h5 13.Bg5 - Dragon Yugoslav Main Line (0)
          • B78o - 10…Rc8 11.Bb3 Ne5 12.h4 h5 13.Bg5 Rc5 - Dragon Yugoslav Main Line (2)
          • B78p - 10…Rc8 11.Bb3 Ne5 12.h4 h5 13.Bg5 Rc5 14.g4 - Dragon Yugoslav Main Line (2)
          • B78q - 10…Rc8 11.Bb3 Ne5 12.h4 h5 13.Bg5 Rc5 14.Kb1 - Dragon Yugoslav Main Line (10)
          • B78r - 10…Qa5 - Dragon Yugoslav Old Main Line (0)
          • B78s - 10…Qa5 11.Bb3 Rac8 - Dragon Yugoslav Old Main Line (0)
          • B78t - 10…Qa5 11.Bb3 Rfc8 - Dragon Yugoslav Old Main Line (0)
        • B79 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Bd7 10.O-O-O Qa5 11.Bb3 Rfc8 12.h4 - Sicilian (2)
          • B79a - 12…h5 - Dragon Yugoslav Old Main Line (1)
          • B79a - Dragon, Yugoslav, Old Main Line, 12.h4 (0)
          • B79b - 12…Ne5 - Dragon Yugoslav Old Main Line (0)
          • B79c - 12…Ne5 13.Kb1 - Dragon Yugoslav Old Main Line (0)
          • B79d - 12…Ne5 13.Kb1 Nc4 - Dragon Yugoslav Old Main Line (0)
          • B79e - 12…Ne5 13.g4 - Dragon Yugoslav Old Main Line (0)
          • B79f - 12…Ne5 13.h5 - Dragon Yugoslav Old Main Line (1)
      • B80-B85 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 Sicilian, Scheveningen variation (943)
        • B80 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 - Sicilian (474)
          • B80a - Scheveningen (229)
          • B80b - 6.Be3 - Scheveningen (3)
          • B80c - 6.Be3 Nc6 - Scheveningen (16)
          • B80d - 6.Be3 Nc6 7.f3 - Scheveningen (9)
          • B80e - 6.Be3 a6 - Scheveningen (13)
          • B80f - 6.Be3 a6 7.Qd2 - Scheveningen (1)
          • B80g - 6.Be3 a6 7.f3 - Scheveningen English Attack (15)
          • B80h - 6.Be3 a6 7.f3 Nc6 - Scheveningen English Attack (0)
          • B80h - 6.Be3 a6 7.f3 Nc6 8.Qd2 - Scheveningen English (4)
          • B80i - 6.Be3 a6 7.f3 Nc6 8.Qd2 Be7 - Scheveningen English (11)
          • B80j - 6.Be3 a6 7.f3 b5 - Scheveningen English Attack (40)
          • B80k - 6.Be3 a6 7.f3 b5 8.Qd2 - Scheveningen English (16)
          • B80l - 6.Be3 a6 7.f3 b5 8.Qd2 Bb7 - Scheveningen English (0)
          • B80l - 6.Be3 a6 7.f3 b5 8.Qd2 Bb7 9.g4 - Scheveningen English (10)
          • B80m - 6.Be3 a6 7.f3 b5 8.Qd2 Nbd7 - Scheveningen English (34)
          • B80n - 6.Bb5+ - Scheveningen Vitolins Variation (0)
          • B80n - 6.Bb5+ Bd7 - Scheveningen Vitolins (0)
          • B80o - 6.g3 - Scheveningen Fianchetto Variation (5)
          • B80p - 6.g3 a6 - Scheveningen Fianchetto Variation (14)
          • B80q - 6.g3 Nc6 - Scheveningen Fianchetto Variation (9)
          • B80r - 6.g3 Nc6 7.Bg2 a6 - Scheveningen Fianchetto Variation (0)
          • B80r - 6.g3 Nc6 7.Bg2 a6 8.O-O - Scheveningen Fianchetto Variation (0)
          • B80r - 6.g3 Nc6 7.Bg2 a6 8.O-O Bd7 - Scheveningen Fianchetto Variation (26)
          • B80s - 6.g3 Nc6 7.Bg2 Qc7 - Scheveningen Fianchetto Variation (0)
          • B80t - 6.g3 Nc6 7.Bg2 Qc7 8.O-O a6 - Scheveningen Fianchetto Variation (16)
          • B80u - 6.g3 Nc6 7.Bg2 Qc7 8.O-O a6 9.Re1 Be7 - Scheveningen Fianchetto Variation (3)
        • B81 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4 - Sicilian (351)
          • B81a - Scheveningen, Keres Attack (175)
          • B81b - 6…e5 - Scheveningen Keres (3)
          • B81c - 6…a6 - Scheveningen Keres (12)
          • B81d - 6…a6 7.Be3 - Scheveningen Keres Perenyi Attack (6)
          • B81e - 6…a6 7.Be3 e5 - Scheveningen Keres Perenyi Attack (10)
          • B81f - 6…a6 7.Be3 h6 - Scheveningen Keres Perenyi Attack (14)
          • B81g - 6…a6 7.Be3 h6 8.f4 - Scheveningen Keres Perenyi Attack (11)
          • B81h - 6…h6 - Scheveningen Keres (5)
          • B81i - 6…h6 7.h3 - Scheveningen Keres (0)
          • B81i - 6…h6 7.h3 a6 8.Bg2 - Scheveningen Keres (0)
          • B81i - 6…h6 7.h3 Nc6 8.Bg2 - Scheveningen Keres (38)
          • B81j - 6…h6 7.h4 - Scheveningen Keres (3)
          • B81k - 6…h6 7.h4 Be7 - Scheveningen Keres (12)
          • B81l - 6…h6 7.h4 Nc6 - Scheveningen Keres (2)
          • B81m - 6…h6 7.h4 Nc6 8.Rg1 - Scheveningen Keres (10)
          • B81n - 6…h6 7.h4 Nc6 8.Rg1 h5 - Scheveningen Keres (19)
          • B81o - 6…h6 7.g5 - Scheveningen Keres (13)
          • B81p - 6…h6 7.Rg1 - Scheveningen Keres (10)
          • B81q - 6…Nc6 - Scheveningen Keres (0)
          • B81r - 6…Nc6 7.g5 Nd7 - Scheveningen Keres (3)
          • B81s - 6…Nc6 7.g5 Nd7 8.Be3 - Scheveningen Keres (4)
          • B81t - 6…Nc6 7.g5 Nd7 8.Be3 Be7 - Scheveningen Keres (1)
        • B82 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 - Sicilian (63)
        • B84 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 - Sicilian (97)
          • B84 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. Be3 - Sicilian Defense: Scheveningen Variation, Classical Variation (1)
          • B84 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Nbd7 - Sicilian Defense: Najdorf Variation, Scheveningen Variation (96)
        • B85 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Be7 8.f4 O-O 9.Be3 - Sicilian (0)
          • B85 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 a6 7. O-O Nf6 8. Be3 Be7 9. f4 d6 10. Qe1 O-O - Sicilian Defense: Scheveningen Variation, Classical Main Line (177)
        • B86 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 - Sicilian (45)
        • B87 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5 - Sicilian (39)
        • B88 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 - Sicilian (5)
        • B89 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 - Sicilian (31)
      • B90-B99 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 Sicilian, Najdorf (1751)
        • B90 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 - Sicilian (1391)
          • B90a - Najdorf (79)
          • B90b - 6.a4 - Najdorf (2)
          • B90c - 6.a4 e5 - Najdorf (0)
          • B90d - 6.f3 - Najdorf (9)
          • B90e - 6.h3 - Najdorf Adams Attack (212)
          • B90f - 6.Bc4 - Najdorf Fischer-Sozin Attack (10)
          • B90g - 6.Be3 - Najdorf (490)
          • B90h - 6.Be3 Ng4 - Najdorf (135)
          • B90h - 6.Be3 Ng4 7.Bg5 - Najdorf (0)
          • B90i - 6.Be3 Ng4 7.Bg5 h6 8.Bh4 g5 9.Bg3 Bg7 - Najdorf (64)
          • B90j - 6.Be3 Ng4 7.Bg5 h6 8.Bh4 g5 9.Bg3 Bg7 10.Be2 h5 - Najdorf (30)
          • B90k - 6.Be3 e5 - Najdorf (106)
          • B90l - 6.Be3 e5 7.Nb3 - Najdorf (42)
          • B90m - 6.Be3 e5 7.Nb3 Be6 8.Qd2 - Najdorf (24)
          • B90n - 6.Be3 e5 7.Nb3 Be6 8.f3 - Najdorf (48)
          • B90o - 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 - Najdorf (8)
          • B90p - 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 Nbd7 - Najdorf (17)
          • B90q - 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 O-O 10.O-O-O - Najdorf (19)
          • B90r - 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 O-O 10.O-O-O Nbd7 - Najdorf (27)
          • B90s - 6.Be3 e5 7.Nb3 Be6 8.f3 Nbd7 - Najdorf (32)
          • B90t - 6.Be3 e5 7.Nb3 Be6 8.f3 Nbd7 9.Qd2 - Najdorf (15)
          • B90u - 6.Be3 e5 7.Nb3 Be6 8.f3 Nbd7 9.Qd2 b5 - Najdorf (22)
        • B91 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3 - Sicilian (148)
          • B91a - Najdorf, 6.g3 (80)
          • B91b - 6…b5 - Najdorf (0)
          • B91c - 6…g6 - Najdorf (6)
          • B91d - 6…Nc6 - Najdorf (0)
          • B91e - 6…Bg4 - Najdorf (3)
          • B91f - 6…e5 - Najdorf (3)
          • B91g - 6…e5 7.Nb3 - Najdorf (4)
          • B91h - 6…e5 7.Nb3 Be7 - Najdorf (15)
          • B91i - 6…e5 7.Nde2 - Najdorf (2)
          • B91j - 6…e5 7.Nde2 b5 - Najdorf (3)
          • B91k - 6…e5 7.Nde2 Nbd7 - Najdorf (1)
          • B91l - 6…e5 7.Nde2 Be7 - Najdorf (13)
          • B91m - 6…e5 7.Nde2 Be7 8.Bg2 Nbd7 - Najdorf (5)
          • B91n - 6…e5 7.Nde2 Be7 8.Bg2 O-O - Najdorf (13)
        • B92 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 - Sicilian (254)
          • B92a - Najdorf, 6.Be2 (0)
          • B92b - 6…Nbd7 - Najdorf (3)
          • B92c - 6…e5 - Najdorf (0)
          • B92d - 6…e5 7.Nf3 - Najdorf (23)
          • B92e - 6…e5 7.Nb3 - Najdorf (3)
          • B92f - 6…e5 7.Nb3 Be7 - Najdorf (30)
          • B92g - 6…e5 7.Nb3 Be7 8.Be3 - Najdorf (7)
          • B92g - 6…e5 7.Nb3 Be7 8.Be3 Be6 - Najdorf (28)
          • B92h - 6…e5 7.Nb3 Be7 8.O-O - Najdorf (6)
          • B92h - 6…e5 7.Nb3 Be7 8.O-O Be6 - Najdorf (3)
          • B92i - 6…e5 7.Nb3 Be7 8.O-O Be6 9.f4 - Najdorf (8)
          • B92j - 6…e5 7.Nb3 Be7 8.O-O O-O - Najdorf (52)
          • B92k - 6…e5 7.Nb3 Be7 8.O-O O-O 9.Be3 - Najdorf (0)
          • B92k - 6…e5 7.Nb3 Be7 8.O-O O-O 9.Be3 Be6 - Najdorf (15)
          • B92l - 6…e5 7.Nb3 Be7 8.O-O O-O 9.Be3 Be6 10.a4 - Najdorf (2)
          • B92m - 6…e5 7.Nb3 Be7 8.O-O O-O 9.Be3 Be6 10.Nd5 - Najdorf (9)
          • B92n - 6…e5 7.Nb3 Be7 8.O-O O-O 9.Be3 Be6 10.Qd2 - Najdorf (21)
          • B92o - 6…e5 7.Nb3 Be7 8.O-O O-O 9.Kh1 - Najdorf (18)
          • B92p - 6…e5 7.Nb3 Be7 8.O-O O-O 9.Kh1 Be6 - Najdorf (3)
          • B92q - 6…e5 7.Nb3 Be7 8.O-O O-O 9.Kh1 Nc6 - Najdorf (22)
          • B92r - 6…e5 7.Nb3 Be7 8.O-O O-O 9.Kh1 Qc7 - Najdorf (1)
        • B93 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 - Sicilian (148)
          • B93a - Najdorf, 6.f4 (78)
          • B93b - 6…Nc6 - Najdorf (3)
          • B93c - 6…Nbd7 - Najdorf (3)
          • B93d - 6…Nbd7 7.Be2 - Najdorf (8)
          • B93e - 6…Qc7 - Najdorf (15)
          • B93f - 6…Qc7 7.Bd3 - Najdorf (1)
          • B93g - 6…Qc7 7.Bd3 g6 - Najdorf (4)
          • B93h - 6…Qc7 7.Nf3 - Najdorf (5)
          • B93i - 6…Qc7 7.Nf3 Nbd7 - Najdorf (2)
          • B93j - 6…Qc7 7.Nf3 Nbd7 8.Bd3 - Najdorf (1)
          • B93k - 6…e5 - Najdorf (0)
          • B93k - 6…e5 7.Nf3 - Najdorf (2)
          • B93l - 6…e5 7.Nf3 Qc7 - Najdorf (1)
          • B93m - 6…e5 7.Nf3 Qc7 8.a4 - Najdorf (0)
          • B93n - 6…e5 7.Nf3 Nbd7 - Najdorf (2)
          • B93o - 6…e5 7.Nf3 Nbd7 8.Bd3 - Najdorf (0)
          • B93p - 6…e5 7.Nf3 Nbd7 8.a4 - Najdorf (0)
          • B93q - 6…e5 7.Nf3 Nbd7 8.a4 Qc7 - Najdorf (2)
          • B93r - 6…e5 7.Nf3 Nbd7 8.a4 Be7 - Najdorf (0)
          • B93r - 6…e5 7.Nf3 Nbd7 8.a4 Be7 9.Bc4 - Najdorf (11)
          • B93s - 6…e5 7.Nf3 Nbd7 8.a4 Be7 9.Bd3 - Najdorf (0)
          • B93t - 6…e5 7.Nf3 Nbd7 8.a4 Be7 9.Bd3 O-O 10.O-O Nc5 - Najdorf (5)
          • B93u - 6…e5 7.Nf3 Nbd7 8.a4 Be7 9.Bd3 O-O 10.O-O exf4 - Najdorf (5)
        • B94 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 - Sicilian (51)
          • B94a - Najdorf, 6.Bg5 (0)
          • B94b - 6…b5 - Najdorf (0)
          • B94c - 6…e5 - Najdorf (0)
          • B94d - 6…Nbd7 - Najdorf (25)
          • B94e - 6…Nbd7 7.f4 - Najdorf (5)
          • B94f - 6…Nbd7 7.f4 b5 - Najdorf (0)
          • B94g - 6…Nbd7 7.Bc4 - Najdorf (14)
          • B94h - 6…Nbd7 7.Bc4 e6 - Najdorf (2)
          • B94i - 6…Nbd7 7.Bc4 e6 8.O-O - Najdorf (1)
          • B94j - 6…Nbd7 7.Bc4 Qa5 - Najdorf (2)
          • B94k - 6…Nbd7 7.Bc4 Qa5 8.Qd2 e6 9.O-O-O - Najdorf (2)
        • B95 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 - Sicilian (6)
          • B95a - Najdorf, 6…e6 (6)
          • B95b - 7.Bd3 - Najdorf (0)
          • B95c - 7.Be2 - Najdorf (0)
          • B95d - 7.Qe2 - Najdorf (0)
          • B95e - 7.Qd2 - Najdorf (0)
          • B95f - 7.Qd2 Be7 - Najdorf (0)
          • B95g - 7.Qd2 Be7 8.O-O-O - Najdorf (0)
          • B95h - 7.Qd3 - Najdorf (0)
          • B95i - 7.Qd3 Nc6 - Najdorf (0)
          • B95j - 7.Qf3 - Najdorf (0)
          • B95k - 7.Qf3 Nbd7 - Najdorf (0)
          • B95l - 7.Qf3 Be7 - Najdorf (0)
          • B95m - 7.Qf3 Be7 8.O-O-O Nbd7 - Najdorf (0)
          • B95n - 7.Qf3 h6 - Najdorf (0)
        • B96 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 - Sicilian (246)
          • B96a - Najdorf, 7.f4 (123)
          • B96b - 7…h6 - Najdorf (1)
          • B96b - 7…h6 8.Bh4 Qb6 - Najdorf Delayed Poisoned Pawn (30)
          • B96c - 7…Nc6 - Najdorf (0)
          • B96c - 7…Nc6 8.e5 - Najdorf (3)
          • B96d - 7…Nc6 8.Nxc6 - Najdorf (2)
          • B96e - 7…Bd7 - Najdorf (3)
          • B96f - 7…Qc7 - Najdorf (1)
          • B96f - 7…Qc7 8.Bxf6 - Najdorf (27)
          • B96g - 7…Qc7 8.Qf3 - Najdorf (1)
          • B96h - 7…Qc7 8.Qf3 b5 - Najdorf (0)
          • B96h - 7…Qc7 8.Qf3 b5 9.Bxf6 - Najdorf (0)
          • B96h - 7…Qc7 8.Qf3 b5 9.f5 - Najdorf (0)
          • B96h - 7…Qc7 8.Qf3 b5 9.O-O-O - Najdorf (3)
          • B96i - 7…Nbd7 - Najdorf (0)
          • B96i - 7…Nbd7 8.Bc4 - Najdorf (0)
          • B96i - 7…Nbd7 8.Qe2 - Najdorf (0)
          • B96i - 7…Nbd7 8.Qe2 Qc7 - Najdorf (20)
          • B96j - 7…Nbd7 8.Qf3 - Najdorf (0)
          • B96j - 7…Nbd7 8.Qf3 Qc7 - Najdorf (4)
          • B96k - 7…Nbd7 8.Qf3 Qc7 9.O-O-O b5 - Najdorf (4)
          • B96l - 7…Nbd7 8.Qf3 Qc7 9.O-O-O b5 10.Bd3 - Najdorf (7)
          • B96m - 7…Nbd7 8.Qf3 Qc7 9.O-O-O b5 10.e5 - Najdorf (2)
          • B96n - 7…b5 - Najdorf Polugaevsky Variation (0)
          • B96n - 7…b5 8.e5 - Najdorf Polugaevsky (0)
          • B96n - 7…b5 8.e5 dxe5 9.fxe5 Qc7 - Najdorf Polugaevsky (3)
          • B96o - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.Nf3 - Najdorf Polugaevsky (0)
          • B96p - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.Bxb5+ - Najdorf Polugaevsky (1)
          • B96q - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.exf6 - Najdorf Polugaevsky (0)
          • B96r - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.exf6 Qe5+ 11.Be2 - Najdorf Polugaevsky (3)
          • B96s - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.exf6 Qe5+ 11.Be2 Qxg5 12.Qd3 - Najdorf Polugaevsky (4)
          • B96t - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.Qe2 - Najdorf Polugaevsky (0)
          • B96u - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.Qe2 Nfd7 11.O-O-O Nc6 - Najdorf Polugaevsky (1)
          • B96v - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.Qe2 Nfd7 11.O-O-O Bb7 - Najdorf Polugaevsky (0)
          • B96w - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.Qe2 Nfd7 11.O-O-O Bb7 12.Qg4 - Najdorf Polugaevsky (0)
          • B96w - 7…b5 8.e5 dxe5 9.fxe5 Qc7 10.Qe2 Nfd7 11.O-O-O Bb7 12.Qg4 Qxe5 - Najdorf Polugaevsky (3)
        • B97 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 - Sicilian (168)
          • B97a - Najdorf, Poisoned Pawn (2)
          • B97b - 8.Bxf6 - Najdorf Poisoned Pawn (0)
          • B97c - 8.a3 - Najdorf Poisoned Pawn (5)
          • B97d - 8.Qd3 - Najdorf Poisoned Pawn (8)
          • B97e - 8.Nb3 - Najdorf Poisoned Pawn (3)
          • B97f - 8.Nb3 Be7 - Najdorf Poisoned Pawn (6)
          • B97g - 8.Nb3 Nbd7 9.Qf3 - Najdorf Poisoned Pawn (2)
          • B97h - 8.Nb3 Nbd7 9.Qf3 Be7 - Najdorf Poisoned Pawn (6)
          • B97i - 8.Qd2 Qxb2 - Najdorf Poisoned Pawn Accepted (3)
          • B97j - 8.Qd2 Qxb2 9.Nb3 - Najdorf Poisoned Pawn (1)
          • B97j - 8.Qd2 Qxb2 9.Nb3 Nc6 - Najdorf Poisoned Pawn (1)
          • B97k - 8.Qd2 Qxb2 9.Nb3 Qa3 - Najdorf Poisoned Pawn (3)
          • B97l - 8.Qd2 Qxb2 9.Nb3 Qa3 10.Bxf6 - Najdorf Poisoned Pawn (7)
          • B97m - 8.Qd2 Qxb2 9.Rb1 - Najdorf Poisoned Pawn (0)
          • B97m - 8.Qd2 Qxb2 9.Rb1 Qa3 - Najdorf Poisoned Pawn (59)
          • B97n - 8.Qd2 Qxb2 9.Rb1 Qa3 10.Be2 - Najdorf Poisoned Pawn (4)
          • B97n - 8.Qd2 Qxb2 9.Rb1 Qa3 10.Be2 Be7 11.O-O - Najdorf Poisoned Pawn (0)
          • B97n - 8.Qd2 Qxb2 9.Rb1 Qa3 10.Be2 Be7 11.O-O Nbd7 - Najdorf Poisoned Pawn (4)
          • B97o - 8.Qd2 Qxb2 9.Rb1 Qa3 10.Bxf6 - Najdorf Poisoned Pawn (4)
          • B97o - 8.Qd2 Qxb2 9.Rb1 Qa3 10.Bxf6 gxf6 11.Be2 Bg7 - Najdorf Poisoned Pawn (0)
          • B97o - 8.Qd2 Qxb2 9.Rb1 Qa3 10.Bxf6 gxf6 11.Be2 Nc6 - Najdorf Poisoned Pawn (4)
          • B97p - 8.Qd2 Qxb2 9.Rb1 Qa3 10.e5 - Najdorf Poisoned Pawn (9)
          • B97p - 8.Qd2 Qxb2 9.Rb1 Qa3 10.e5 dxe5 - Najdorf Poisoned Pawn (0)
          • B97p - 8.Qd2 Qxb2 9.Rb1 Qa3 10.e5 dxe5 11.fxe5 Nfd7 12.Bc4 - Najdorf Poisoned Pawn (0)
          • B97p - 8.Qd2 Qxb2 9.Rb1 Qa3 10.e5 dxe5 11.fxe5 Nfd7 12.Bc4 Bb4 - Najdorf Poisoned Pawn (9)
          • B97q - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 - Najdorf Poisoned Pawn (3)
          • B97q - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 - Najdorf Poisoned Pawn (3)
          • B97r - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 - Najdorf Poisoned Pawn Main Line (1)
          • B97s - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.Be2 - Najdorf Poisoned Pawn Main Line Timman’s (11)
          • B97t - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 - Najdorf Poisoned Pawn Main Line (0)
          • B97t - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 Nd5 - Najdorf Poisoned Pawn Main Line (0)
          • B97u - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 dxe5 - Najdorf Poisoned Pawn Main Line (1)
          • B97u - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 dxe5 14.Bxf6 gxf6 15.Ne4 - Najdorf Poisoned Pawn Main Line dxe5: (1)
          • B97v - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 dxe5 14.Bxf6 gxf6 15.Ne4 Qxa2 - Najdorf Poisoned Pawn Main Line dxe5: (3)
          • B97w - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 dxe5 14.Bxf6 gxf6 15.Ne4 Be7 - Najdorf Poisoned Pawn Main Line dxe5: (2)
          • B97x - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 dxe5 14.Bxf6 gxf6 15.Ne4 Be7 16.Be2 h5 17.Rb3 Qa4 18.c4 - Najdorf Poisoned Pawn Main Line with (0)
          • B97y - 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.fxe6 fxe6 12.Nxc6 bxc6 13.e5 dxe5 14.Bxf6 gxf6 15.Ne4 Be7 16.Be2 h5 17.Rb3 Qa4 18.Nxf6+ - Najdorf Poisoned Pawn Main Line with (3)
        • B98 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 - Sicilian (14)
          • B98a - Najdorf, 7…Be7 (7)
          • B98b - 8.Qf3 - Najdorf (0)
          • B98c - 8.Qf3 Qa5 - Najdorf Danner Variation (0)
          • B98d - 8.Qf3 Qa5 9.O-O-O Bd7 - Najdorf Danner (0)
          • B98e - 8.Qf3 Qa5 9.O-O-O Bd7 10.e5 - Najdorf Danner (0)
          • B98f - 8.Qf3 h6 - Najdorf (0)
          • B98g - 8.Qf3 h6 9.Bh4 Qc7 - Najdorf Browne Variation (0)
          • B98h - 8.Qf3 h6 9.Bh4 Qc7 10.O-O-O Nbd7 - Najdorf Browne (1)
          • B98i - 8.Qf3 h6 9.Bh4 Qc7 10.O-O-O Nbd7 11.Qg3 - Najdorf Browne (1)
          • B98j - 8.Qf3 h6 9.Bh4 Qc7 10.O-O-O Nbd7 11.Be2 - Najdorf Browne (2)
          • B98k - 8.Qf3 h6 9.Bh4 g5 - Najdorf Gothenburg (Argentine) Variation (0)
          • B98l - 8.Qf3 h6 9.Bh4 g5 10.fxg5 Nfd7 11.Nxe6 - Najdorf Gothenburg (1)
          • B98m - 8.Qf3 h6 9.Bh4 g5 10.fxg5 Nfd7 11.Qh5 - Najdorf Gothenburg (0)
          • B98n - 8.Qf3 Qc7 - Najdorf (0)
          • B98n - 8.Qf3 Qc7 9.O-O-O - Najdorf (2)
          • B98o - 8.Qf3 Qc7 9.O-O-O b5 - Najdorf (0)
          • B98p - 8.Qf3 Qc7 9.O-O-O Nc6 - Najdorf (0)
          • B98q - 8.Qf3 Qc7 9.O-O-O Nc6 10.Nxc6 - Najdorf (0)
        • B99 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7 9.O-O-O Nbd7 - Sicilian (46)
          • B99a - Najdorf, Main Line (23)
          • B99b - 10.Qg3 - Najdorf Main Line (1)
          • B99c - 10.Be2 - Najdorf Main Line Keres Variation (0)
          • B99c - 10.Be2 b5 11.Bxf6 Nxf6 12.e5 Bb7 - Najdorf Main Line Keres (0)
          • B99d - 10.Be2 b5 11.Bxf6 Nxf6 12.e5 Bb7 13.exf6 - Najdorf Main Line Keres Queen Sacrifice Line (0)
          • B99e - 10.Be2 b5 11.Bxf6 Nxf6 12.e5 Bb7 13.Qg3 - Najdorf Main Line Keres (0)
          • B99e - 10.Be2 b5 11.Bxf6 Nxf6 12.e5 Bb7 13.Qg3 dxe5 14.fxe5 Nd7 15.Bxb5 - Najdorf Main Line Keres (0)
          • B99f - 10.Bd3 - Najdorf Main Line (0)
          • B99f - 10.Bd3 h6 - Najdorf Main Line (0)
          • B99g - 10.Bd3 h6 11.Qh3 - Najdorf Main Line (2)
          • B99h - 10.Bd3 h6 11.Bh4 - Najdorf Main Line (0)
          • B99h - 10.Bd3 h6 11.Bh4 g5 - Najdorf Main Line (0)
          • B99i - 10.Bd3 h6 11.Bh4 g5 12.fxg5 - Najdorf Main Line (4)
          • B99j - 10.Bd3 b5 - Najdorf Main Line (0)
          • B99j - 10.Bd3 b5 11.Rhe1 Bb7 - Najdorf Main Line (0)
          • B99k - 10.Bd3 b5 11.Rhe1 Bb7 12.Nd5 - Najdorf Main Line (0)
          • B99l - 10.Bd3 b5 11.Rhe1 Bb7 12.Qg3 - Najdorf Main Line (3)
          • B99m - 10.g4 - Najdorf Main Line (0)
          • B99m - 10.g4 h6 - Najdorf Main Line (3)
          • B99n - 10.g4 b5 - Najdorf Main Line (0)
          • B99n - 10.g4 b5 11.Bd3 - Najdorf Main Line (0)
          • B99n - 10.g4 b5 11.Bd3 Bb7 - Najdorf Main Line (0)
          • B99o - 10.g4 b5 11.a3 - Najdorf Main Line (0)
          • B99p - 10.g4 b5 11.Bxf6 - Najdorf Main Line (0)
          • B99q - 10.g4 b5 11.Bxf6 gxf6 - Najdorf Main Line (1)
          • B99r - 10.g4 b5 11.Bxf6 Nxf6 - Najdorf Main Line (0)
          • B99r - 10.g4 b5 11.Bxf6 Nxf6 12.g5 - Najdorf Main Line (0)
          • B99r - 10.g4 b5 11.Bxf6 Nxf6 12.g5 Nd7 13.a3 - Najdorf Main Line (2)
          • B99s - 10.g4 b5 11.Bxf6 Nxf6 12.g5 Nd7 13.f5 - Najdorf Modern Main Line (2)
          • B99t - 10.g4 b5 11.Bxf6 Nxf6 12.g5 Nd7 13.f5 Bxg5+ - Najdorf Modern Main Line (0)
          • B99u - 10.g4 b5 11.Bxf6 Nxf6 12.g5 Nd7 13.f5 Bxg5+ 14.Kb1 Ne5 - Najdorf Modern Main Line (4)
          • B99v - 10.g4 b5 11.Bxf6 Nxf6 12.g5 Nd7 13.f5 Nc5 - Najdorf Modern Main Line (1)
          • B99w - 10.g4 b5 11.Bxf6 Nxf6 12.g5 Nd7 13.f5 Nc5 14.h4 - Najdorf Modern Main Line (0)
          • B99x - 10.g4 b5 11.Bxf6 Nxf6 12.g5 Nd7 13.f5 Nc5 14.f6 - Najdorf Modern Main Line (0)
          • B99y - 10.g4 b5 11.Bxf6 Nxf6 12.g5 Nd7 13.f5 Nc5 14.f6 gxf6 15.gxf6 Bf8 16.Rg1 - Najdorf Modern Main Line Perenyi’s (0)
  • SÉRIE C (11804)
    • C00-C19 1. e4 e6 French defence (2045)
      • C00a - 1. e4 e6 - French Defense (130)
        • 2.c4 d5 (1)
          • C00e - (not 3.cxd5) (0)
          • C00e - 3.cxd5 exd5 4.Qb3 (1)
        • 2.d3 d5 (62)
          • C00m - 2...d5 (not 3.Nd2, 3.Qe2) (5)
          • C00n - 3.Qe2 (not 3...Nf6) (10)
          • C00o - 3.Qe2 Nf6 (7)
          • C00p - 3.Nd2 (not 3...Nf6, 3...c5) (2)
          • C00q - 3.Nd2 c5 (4)
          • C00r - 3.Nd2 Nf6 (not 4.Ngf3) (7)
          • C00s - 3.Nd2 Nf6 4.Ngf3 (not 4...Nc6, 4...b6) (7)
          • C00t - 3.Nd2 Nf6 4.Ngf3 b6 (8)
          • C00u - 3.Nd2 Nf6 4.Ngf3 Nc6 (not 5.c3) (1)
          • C00v - 3.Nd2 Nf6 4.Ngf3 Nc6 5.c3 (11)
        • 2.Nc3 d5 (0)
          • C00f - 2...d5 (not 3.f4) (0)
          • C00f - 3.f4 (0)
        • 2.Nf3 d5 (7)
          • C00j - 2...d5 (not 3.e5) (0)
          • C00j - 3.e5 (not 3...c5) (0)
          • C00j - 3.e5 c5 (not 4.b4) (1)
          • C00k - 3.e5 c5 4.b4 (3)
        • 2.Qe2 c5 (17)
          • C00h - 2...c5 (not 3.Nf3) (7)
          • C00i - 3.Nf3 (10)
      • C00a - 2.Bb5 (0)
      • C00b - 2.b3 (4)
      • C00c - 2.f4 (6)
      • C00d - 2.e5 (0)
      • C00e - 2.c4 - Steiner (Anglo-French) Variation (2)
      • C00f - 2.Nc3 (not 2...d5) (0)
      • C00g - 2.Qe2 - Chigorin Variation (3)
      • C00j - 2.Nf3 (not 2...d5) (0)
      • C00l - 2.Nf3 d5 3.Nc3 - Two Knights Variation (5)
      • C00m - 2.d3 (14)
      • C00w - 2.d4 (not 2...a6, 2...c5) (0)
      • C00w - 2.d4 a6 (4)
      • C00w - 2.d4 c5 (0)
      • C00y - 2.d4 d5 3.Bd3 - Schlechter (8)
      • C01 - 1. e4 e6 2. d4 d5 3. exd5 - French Defense: Exchange Variation (137)
        • 3...exd5 4.Bd3 Bd6 — Exchange (31)
          • C01j - 4...Bd6 (not 5.Nf3) (2)
          • C01o - 5.Nf3 (not 5...Nf6) (6)
          • C01p - 5.Nf3 Nf6 (23)
        • 3...exd5 4.c4 Nf6 — Exchange (10)
          • C01d - 4...Nf6 (not 5.Nc3, 5.Nf3) (0)
          • C01d - 5.Nf3 (0)
          • C01e - 5.Nc3 (not 5...Bb4, 5...Be7, 5...c6) (0)
          • C01e - 5.Nc3 Bb4 (not 6.Nf3) (0)
          • C01e - 5.Nc3 Bb4 6.Nf3 (7)
          • C01e - 5.Nc3 c6 (0)
          • C01f - 5.Nc3 Be7 (not 6.Nf3) (0)
          • C01f - 5.Nc3 Be7 6.Nf3 (3)
        • 3...exd5 4.h3 - Exchange Variation (1)
        • 3...exd5 4.Nc3 Bb4 — Exchange (24)
          • C01u - 4...Bb4 (not 5.Bd3) (0)
          • C01v - 5.Bd3 (not 5...Nc6) (0)
          • C01v - 5.Bd3 Ne7 6.Qh5 (13)
          • C01w - 5.Bd3 Nc6 (11)
        • 3...exd5 4.Nc3 Nf6 — Exchange (5)
          • C01s - 4...Nf6 (not 5.Bg5, 5.Nf3) (0)
          • C01s - 5.Nf3 (2)
          • C01t - 5.Bg5 (not 5...Nc6) (0)
          • C01t - 5.Bg5 Nc6 (3)
        • 3...exd5 4.Nf3 Bd6 — Exchange (17)
          • C01n - 4...Bd6 (not 5.c4) (2)
          • C01q - 5.c4 (15)
        • 3...exd5 4.Nf3 Nf6 — Exchange (8)
          • C01l - 4...Nf6 (not 5.Bd3) (4)
          • C01m - 5.Bd3 (4)
        • C01 sdfgsdfg- 1. e4 e6 2. d4 d5 3. exd5 - French Defense (6)
        • C01a - 3...Qxd5 (0)
        • C01a - 3.exd5 (not 3...Qxd5, 3...exd5) (1)
        • C01b - 3...exd5 (not 4.Bd3, 4.Bf4, 4.Nc3, 4.Nf3, 4.c4) (1)
        • C01c - 3...exd5 4.c4 (not 4...c6) (0)
        • C01c - 3...exd5 4.c4 c6 (2)
        • C01g - 3...exd5 4.Bf4 (0)
        • C01h - 3...exd5 4.Bd3 (not 4...Nc6) (5)
        • C01i - 3...exd5 4.Bd3 Nc6 (3)
        • C01k - 3...exd5 4.Nf3 (22)
        • C01r - 3...exd5 4.Nc3 (not 4...Bb4, 4...Nf6) (1)
      • C02a - 1. e4 e6 2. d4 d5 3. e5 - French Defense: Advance Variation (185)
        • 3...c5 4.c3 Nc6 (122)
          • C02k - 4...Nc6 (not 5.Nf3) (1)
          • C02l - 5.Nf3 (not 5...Qb6) (1)
          • C02o - 5.Nf3 Bd7 6.a3 (5)
          • C02p - 5.Nf3 Bd7 6.Be2 (not 6...Nge7) (20)
          • C02q - 5.Nf3 Bd7 6.Be2 Nge7 (32)
          • C02r - 5.Nf3 Qb6 (6)
          • C02u - 5.Nf3 Qb6 6.Be2 cxd4 7.cxd4 (7)
          • C02y - 5.Nf3 Qb6 6.a3 c4 (not 7.Nbd2) (0)
          • C02z - 5.Nf3 Qb6 6.a3 c4 7.Nbd2 (17)
        • 3...c5 4.c3 Nc6 5.Nf3 Qb6 6.a4 (1)
        • 3...c5 4.c3 Nc6 5.Nf3 Qb6 6.g3 (2)
        • 3...c5 4.c3 Qa5 (1)
        • 3...c5 4.c3 Qb6 — Wade (16)
          • C02h - (not 5.Nf3) (0)
          • C02i - 5.Nf3 Bd7 (not 6.Be2) (10)
          • C02j - 5.Nf3 Bd7 6.Be2 (6)
      • C02a - 3...Ne7 (0)
      • C02b - 3...b6 (not 4.c3) (0)
      • C02b - 3...b6 4.c3 Qd7 (2)
      • C02c - 3...c5 (not 4.Nf3, 4.Qg4, 4.b4, 4.c3, 4.dxc5) (0)
      • C02c - 3...c5 4.b4 (0)
      • C02d - 3...c5 4.dxc5 (0)
      • C02e - 3...c5 4.Qg4 (not 4...cxd4) (0)
      • C02e - 3...c5 4.Qg4 cxd4 5.Nf3 (0)
      • C02f - 3...c5 4.Nf3 (not 4...cxd4) (0)
      • C02f - 3...c5 4.Nf3 cxd4 5.Bd3 (3)
      • C02g - 3...c5 4.c3 (not 4...Nc6, 4...Qb6) (3)
      • C02m - 3...c5 4.c3 Nc6 5.Nf3 Nge7 - 5.Nf3 Nge7 (9)
      • C02n - 3...c5 4.c3 Nc6 5.Nf3 Bd7 - Euwe (14)
      • C02s - 3...c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 - Milner-Barry Gambit (7)
      • C02t - 3...c5 4.c3 Nc6 5.Nf3 Qb6 6.Be2 - 5.Nf3 Qb6 6.Be2 (5)
      • C02v - 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 - French Defense: Advance Variation, Main Line (30)
      • C02w - 6...Bd7 - Advance Variation (4)
      • C02x - 6...Nh6 - 5.Nf3 Qb6 6.a3 Nh6 (21)
      • C03a - 1. e4 e6 2. d4 d5 3. Nd2 - French Defense: Tarrasch Variation (72)
        • 3...Be7 4.Bd3 c5 (13)
          • C03h - (not 5.dxc5) (0)
          • C03i - 5.dxc5 Nf6 (13)
        • 3...Be7 4.Ngf3 Nf6 (7)
          • C03j - 4...Nf6 (not 5.Bd3) (4)
          • C03k - 5.Bd3 (3)
      • C03a - 3...dxe4 (16)
      • C03b - 3...f5 (2)
      • C03c - 3...b6 (5)
      • C03d - 3...a6 (not 4.Ngf3) (2)
      • C03e - 3...a6 4.Ngf3 (2)
      • C03f - 3...Be7 (not 4.Bd3, 4.Ngf3) (19)
      • C03g - 3...Be7 4.Bd3 (not 4...c5) (1)
      • C03j - 3...Be7 4.Ngf3 (not 4...Nf6) (0)
      • C03l - 3...Nc6 (not 4.Ngf3, 4.c3) (0)
      • C03m - 3...Nc6 4.c3 (not 4...e5) (1)
      • C03n - 3...Nc6 4.c3 e5 (3)
      • C03o - 3...Nc6 4.Ngf3 (0)
      • C04a - 1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 - French Defense: Tarrasch Variation, Guimard Defense, Main Line (27)
        • 5.e5 Nd7 — Main Line (26)
          • C04c - 5...Nd7 (not 6.Bb5, 6.Be2, 6.Nb3, 6.c3) (7)
          • C04d - 6.c3 — Main Line (2)
          • C04e - 6.Bb5 — Main Line (3)
          • C04f - 6.Be2 (not 6...f6) (2)
          • C04g - 6.Be2 f6 — Main Line (3)
          • C04h - 6.Nb3 (not 6...Be7, 6...a5) (0)
          • C04i - 6.Nb3 a5 — Main Line (6)
          • C04j - 6.Nb3 Be7 — Main Line (3)
      • C04b - 5.e5 (not 5...Nd7) (1)
      • C05a - 1. e4 e6 2. d4 d5 3. Nd2 Nf6 - French Defense: Tarrasch Variation, Closed Variation (60)
        • 4.e5 Ne4 (2)
          • C05c - 4...Ne4 (not 5.Nxe4) (0)
          • C05c - 5.Nxe4 (2)
        • 4.e5 Nfd7 (54)
          • C05d - 4...Nfd7 (not 5.Bd3, 5.c3, 5.f4) (0)
          • C05e - 5.f4 (5)
          • C05f - 5.f4 c5 6.c3 Nc6 (not 7.Ndf3) (0)
          • C05g - 5.f4 c5 6.c3 Nc6 7.Ndf3 (not 7...Qb6, 7...cxd4) (6)
          • C05h - 5.f4 c5 6.c3 Nc6 7.Ndf3 cxd4 (1)
          • C05i - 5.f4 c5 6.c3 Nc6 7.Ndf3 Qb6 (not 8.Ne2, 8.g3, 8.h4) (2)
          • C05j - 5.f4 c5 6.c3 Nc6 7.Ndf3 Qb6 8.h4 (not 8...cxd4) (0)
          • C05j - 5.f4 c5 6.c3 Nc6 7.Ndf3 Qb6 8.h4 cxd4 9.cxd4 (2)
          • C05k - 5.f4 c5 6.c3 Nc6 7.Ndf3 Qb6 8.Ne2 (not 8...cxd4) (0)
          • C05k - 5.f4 c5 6.c3 Nc6 7.Ndf3 Qb6 8.Ne2 cxd4 9.cxd4 (9)
          • C05l - 5.f4 c5 6.c3 Nc6 7.Ndf3 Qb6 8.g3 (not 8...cxd4) (0)
          • C05l - 5.f4 c5 6.c3 Nc6 7.Ndf3 Qb6 8.g3 cxd4 9.cxd4 (3)
          • C05m - 5.c3 (0)
          • C05n - 5.Bd3 (1)
          • C05o - 5.Bd3 c5 6.c3 b6 (5)
          • C05p - 5.Bd3 c5 6.c3 Nc6 (not 7.Ndf3, 7.Ne2, 7.Ngf3) (0)
          • C05p - 5.Bd3 c5 6.c3 Nc6 7.Ndf3 (not 7...Qa5) (0)
          • C05q - 5.Bd3 c5 6.c3 Nc6 7.Ndf3 Qa5 (1)
          • C05r - 5.Bd3 c5 6.c3 Nc6 7.Ngf3 (not 7...Be7) (11)
          • C05s - 5.Bd3 c5 6.c3 Nc6 7.Ngf3 Be7 (3)
          • C05t - 5.Bd3 c5 6.c3 Nc6 7.Ngf3 Be7 8.O-O g5 (4)
          • C05u - 5.Bd3 c5 6.c3 Nc6 7.Ngf3 Qb6 8.O-O (1)
          • C05v - 5.Bd3 c5 6.c3 Nc6 7.Ne2 (not 7...a5) (0)
          • C05w - 5.Bd3 c5 6.c3 Nc6 7.Ne2 a5 (0)
      • C05b - 4.e5 (not 4...Ne4, 4...Nfd7) (0)
      • C06a - 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 - French Defense: Tarrasch Variation, Closed Variation, Main Line (20)
        • 8...f6 9.exf6 Nxf6 (18)
          • C06n - (not 10.O-O) (2)
          • C06o - 10.O-O Bd6 11.Nf3 (not 11...O-O, 11...Qb6, 11...Qc7) (0)
          • C06o - 10.O-O Bd6 11.Nf3 Qb6 (not 12.Nc3) (2)
          • C06p - 10.O-O Bd6 11.Nf3 Qb6 12.Nc3 (0)
          • C06q - 10.O-O Bd6 11.Nf3 Qc7 (not 12.Bg5) (6)
          • C06r - 10.O-O Bd6 11.Nf3 Qc7 12.Bg5 (4)
          • C06s - 10.O-O Bd6 11.Nf3 O-O (not 12.Bf4) (1)
          • C06t - 10.O-O Bd6 11.Nf3 O-O 12.Bf4 (3)
      • C06b - 8...Nb6 (not 9.Nf3, 9.O-O) (0)
      • C06c - 8...Nb6 9.Nf3 (0)
      • C06d - 8...Nb6 9.O-O (not 9...Bd7, 9...a5) (0)
      • C06e - 8...Nb6 9.O-O a5 (0)
      • C06f - 8...Nb6 9.O-O Bd7 (1)
      • C06g - 8...Qb6 (not 9.Nf3, 9.O-O) (0)
      • C06h - 8...Qb6 9.O-O (0)
      • C06i - 8...Qb6 9.Nf3 (not 9...f6) (0)
      • C06j - 8...Qb6 9.Nf3 f6 (0)
      • C06k - 8...f6 (not 9.Nf4, 9.exf6) (0)
      • C06l - 8...f6 9.Nf4 (1)
      • C06m - 8...f6 9.exf6 (not 9...Nxf6) (0)
      • C07a - 1. e4 e6 2. d4 d5 3. Nd2 c5 - French Defense: Tarrasch Variation, Open System (188)
        • 4.exd5 Qxd5 — Main Line (107)
          • C07k - 5.Ngf3 (not 5...cxd4) (0)
          • C07l - 5...cxd4 (not 6.Bc4) (0)
          • C07m - 5...cxd4 6.Bc4 (not 6...Qd6, 6...Qd8) (11)
          • C07n - 5.Ngf3 cxd4 6.Bc4 Qd8 (9)
          • C07o - 5.Ngf3 cxd4 6.Bc4 Qd6 (9)
          • C07p - 5...cxd4 6.Bc4 Qd6 7.O-O Nf6 8.Nb3 Nc6 9.Nbxd4 Nxd4 10.Qxd4 (not 10...Qxd4) (0)
          • C07p - 5.Ngf3 cxd4 6.Bc4 Qd6 7.O-O Nf6 8.Nb3 Nc6 9.Nbxd4 Nxd4 10.Qxd4 Qxd4 — Main Line (7)
          • C07q - 5...cxd4 6.Bc4 Qd6 7.O-O Nf6 8.Nb3 Nc6 9.Nbxd4 Nxd4 10.Nxd4 (not 10...a6) (18)
          • C07r - 5...cxd4 6.Bc4 Qd6 7.O-O Nf6 8.Nb3 Nc6 9.Nbxd4 Nxd4 10.Nxd4 a6 (not 11.Re1, 11.c3) (9)
          • C07s - 5.Ngf3 cxd4 6.Bc4 Qd6 7.O-O Nf6 8.Nb3 Nc6 9.Nbxd4 Nxd4 10.Nxd4 a6 11.c3 — Main Line (3)
          • C07t - 5.Ngf3 cxd4 6.Bc4 Qd6 7.O-O Nf6 8.Nb3 Nc6 9.Nbxd4 Nxd4 10.Nxd4 a6 11.Re1 — Main Line (23)
      • C07b - 4.c3 (0)
      • C07c - 4.dxc5 - Open System (4)
      • C07d - 4.Ngf3 (not 4...Nc6, 4...Nf6, 4...a6, 4...cxd4) (7)
      • C07e - 4.Ngf3 a6 (7)
      • C07f - 4.Ngf3 Nf6 (14)
      • C07g - 4.Ngf3 Nc6 (4)
      • C07h - 4.Ngf3 cxd4 (44)
      • C07i - 4.exd5 (not 4...Nf6, 4...Qxd5) (0)
      • C07i - 4.exd5 Nf6 (0)
      • C07j - 4.exd5 Qxd5 - 4.exd5 Qxd5 (19)
      • C08a - 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 - French Defense: Tarrasch Variation, Open System (57)
        • 5.Bb5+ Bd7 (11)
          • C08d - 5...Bd7 (not 6.Qe2+) (3)
          • C08e - 6.Qe2+ (not 6...Be7) (0)
          • C08f - 6.Qe2+ Be7 (8)
        • 5.Bb5+ Nc6 (1)
          • C08b - 5...Nc6 (not 6.Qe2+) (0)
          • C08c - 6.Qe2+ (1)
        • 5.Ngf3 a6 (14)
          • C08h - 5...a6 (not 6.Be2) (5)
          • C08i - 6.Be2 (9)
        • 5.Ngf3 Nf6 — Main Line (27)
          • C08j - (not 6.Bb5+) (8)
          • C08k - 6.Bb5+ Bd7 7.Bxd7+ (2)
          • C08l - 6.Bb5+ Bd7 7.Bxd7+ Nbxd7 8.O-O Be7 9.dxc5 — Main Line (9)
          • C08m - 6.Bb5+ Bd7 7.Bxd7+ Nbxd7 8.O-O Be7 9.dxc5 Nxc5 10.Nb3 — Main Line (8)
      • C08g - 5.Ngf3 (not 5...Nf6, 5...a6) (4)
      • C09a - 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6 - French Defense: Tarrasch Variation, Open System, Main Line (70)
        • 6.Bb5 Bd6 — Main Line (61)
          • C09d - 6...Bd6 (not 7.O-O, 7.dxc5) (0)
          • C09d - 7.O-O (1)
          • C09e - 7.dxc5 (4)
          • C09f - 7.dxc5 Bxc5 8.O-O Ne7 — Main Line (1)
          • C09g - 7.O-O Ne7 8.dxc5 Bxc5 9.c3 — Main Line (1)
          • C09h - 7.O-O Ne7 8.dxc5 Bxc5 9.c3 O-O 10.Nb3 Bd6 — Main Line (5)
          • C09i - 7.O-O Ne7 8.dxc5 Bxc5 9.c3 O-O 10.Nb3 Bb6 (not 11.Re1) (4)
          • C09j - 7.O-O Ne7 8.dxc5 Bxc5 9.c3 O-O 10.Nb3 Bb6 11.Re1 — Main Line (5)
          • C09k - 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 (not 9...Bb6, 9...Bd6) (0)
          • C09k - 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bb6 — Main Line (5)
          • C09l - 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 (not 10.Bg5, 10.Nbd4, 10.Re1) (4)
          • C09m - 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Nbd4 — Main Line (7)
          • C09n - 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Bg5 — Main Line (4)
          • C09o - 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Re1 — Main Line (7)
          • C09p - 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Re1 O-O 11.Bg5 (not 11...Bg4) (7)
          • C09q - 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Re1 O-O 11.Bg5 Bg4 — Main Line (6)
      • C09b - 6.Bb5 (not 6...cxd4) (5)
      • C09c - 6.Bb5 cxd4 (4)
      • C10a - 1. e4 e6 2. d4 d5 3. Nc3 - French Defense: Paulsen Variation (198)
        • 3...dxe4 4.Nxe4 Bd7 (40)
          • C10r - 4...Bd7 (not 5.Nf3) (0)
          • C10s - 5.Nf3 (2)
          • C10t - 5.Nf3 Bc6 6.Bd3 (not 6...Nd7) (0)
          • C10u - 5.Nf3 Bc6 6.Bd3 Nd7 (not 7.O-O) (10)
          • C10v - 5.Nf3 Bc6 6.Bd3 Nd7 7.O-O (not 7...Ngf6) (2)
          • C10w - 5.Nf3 Bc6 6.Bd3 Nd7 7.O-O Ngf6 (26)
        • 3...dxe4 4.Nxe4 Nd7 — Capablanca (117)
          • C10h - (not 5.Nf3) (22)
          • C10i - 5.Nf3 Be7 (3)
          • C10j - 5.Nf3 Ngf6 (not 6.Bd3, 6.Nxf6+) (0)
          • C10k - 5.Nf3 Ngf6 6.Bd3 (24)
          • C10l - 5.Nf3 Ngf6 6.Nxf6+ (28)
          • C10m - 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Ne5 (1)
          • C10n - 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Bd3 (not 7...c5) (2)
          • C10o - 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Bd3 c5 (not 8.dxc5) (11)
          • C10p - 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Bd3 c5 8.dxc5 (9)
          • C10q - 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Bg5 (17)
      • C10b - 3...c5 (0)
      • C10c - 3...Nc6 (not 4.Nf3) (7)
      • C10d - 3...Nc6 4.Nf3 Nf6 (15)
      • C10e - 3...Be7 (6)
      • C10f - 3...dxe4 (not 4.Nxe4) (0)
      • C10f - 3...dxe4 4.Nxe4 (not 4...Nf6, 4...Qd5, 4...e5) (0)
      • C10f - 3...dxe4 4.Nxe4 e5 (0)
      • C10f - 3...dxe4 4.Nxe4 Qd5 (1)
      • C10g - 3...dxe4 4.Nxe4 Nf6 (2)
      • C11a - 1. e4 e6 2. d4 d5 3. Nc3 Nf6 - French Defense (468)
        • 4.Bg5 dxe4 (169)
          • C11p - 5...Nbd7 (not 6.Nf3) (1)
          • C11p - 5.Nxe4 (not 5...Be7, 5...Nbd7) (0)
          • C11q - 5...Nbd7 6.Nf3 (not 6...Be7) (44)
          • C11r - 5.Nxe4 Nbd7 6.Nf3 Be7 (not 7.Nxf6+) (0)
          • C11r - 5.Nxe4 Nbd7 6.Nf3 Be7 7.Nxf6+ Nxf6 (25)
          • C11s - 5.Nxe4 Be7 (7)
          • C11t - 5.Nxe4 Be7 6.Bxf6 Bxf6 (39)
          • C11u - 5...Be7 6.Bxf6 gxf6 (not 7.Nf3) (9)
          • C11v - 5...Be7 6.Bxf6 gxf6 7.Nf3 (not 7...b6) (29)
          • C11w - 5...Be7 6.Bxf6 gxf6 7.Nf3 b6 (not 8.Bc4, 8.Bd3) (0)
          • C11w - 5.Nxe4 Be7 6.Bxf6 gxf6 7.Nf3 b6 8.Bc4 (0)
          • C11w - 5.Nxe4 Be7 6.Bxf6 gxf6 7.Nf3 b6 8.Bd3 (7)
        • 4.Bg5 dxe4 - Burn Variation (12)
        • 4.e5 Nfd7 (266)
          • C11c - 5.Qg4 (28)
          • C11d - 5.Nf3 (not 5...c5) (0)
          • C11d - 5.Nf3 c5 (not 6.dxc5) (1)
          • C11e - 5.Nf3 c5 6.dxc5 (1)
          • C11f - 5.f4 c5 (not 6.dxc5) (1)
          • C11g - 5.f4 c5 6.dxc5 (not 6...Nc6) (0)
          • C11g - 5.f4 c5 6.dxc5 Bxc5 7.Qg4 (0)
          • C11g - 5.f4 c5 6.dxc5 Nc6 (not 7.a3) (0)
          • C11g - 5.f4 c5 6.dxc5 Nc6 7.a3 Bxc5 8.Qg4 O-O 9.Nf3 f6 (0)
          • C11k - 5.f4 c5 6.Nf3 Nc6 7.Be3 a6 8.Qd2 b5 (40)
          • C11m - 5.f4 c5 6.Nf3 Nc6 7.Be3 cxd4 8.Nxd4 Qb6 (27)
          • C11n - 5.f4 c5 6.Nf3 Nc6 7.Be3 cxd4 8.Nxd4 Bc5 (37)
      • C11a - 4.Be3 (0)
      • C11a - 4.exd5 (1)
      • C11b - 4.Bd3 (1)
      • C11c - 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 - French Defense: Classical Variation, Steinitz Variation (158)
        • C11 - 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 - French Defense: Classical Variation (158)
          • 5.Nce2 (4)
          • C11f - 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 - French Defense: Classical Variation (23)
          • C11h - 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 - French Defense: Steinitz Variation (153)
            • 6...Be7 - Steinitz Variation (2)
            • C11 - 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 - French Defense: Steinitz Variation (123)
              • 7.Bd3 - Steinitz Variation (1)
              • C11i - 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 - French Defense: Steinitz Variation, Boleslavsky Variation (93)
                • 7...Be7 - Boleslavsky Variation (4)
                • 7...Qc7 - Boleslavsky Variation (1)
              • C11j - 7...a6 (35)
              • C11l - 7...cxd4 (8)
      • C11o - 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4 - Burn Variation (1)
      • C11o - 4.Bg5 (not 4...dxe4) (0)
      • C12a - 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 - French Defense: McCutcheon Variation (32)
        • 5.e5 h6 — Main Line (29)
          • C12d - 5...h6 (not 6.Bc1, 6.Bd2, 6.Be3, 6.Bh4, 6.exf6) (0)
          • C12e - 6.exf6 (not 6...hxg5) (0)
          • C12e - 6.exf6 hxg5 7.fxg7 Rg8 8.h4 gxh4 9.Qg4 (0)
          • C12f - 6.Bc1 (5)
          • C12g - 6.Bh4 (0)
          • C12h - 6.Be3 — Janowski (5)
          • C12i - 6.Bd2 (not 6...Bxc3, 6...Nfd7) (0)
          • C12i - 6.Bd2 Nfd7 — Tartakower (0)
          • C12j - 6.Bd2 Bxc3 (not 7.bxc3) (1)
          • C12k - 6.Bd2 Bxc3 7.bxc3 — Lasker (1)
          • C12l - 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 (not 8...Kf8, 8...g6) (0)
          • C12l - 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 Kf8 (not 9.Bc1, 9.Bd3) (0)
          • C12l - 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 Kf8 9.Bc1 (2)
          • C12m - 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 Kf8 9.Bd3 (5)
          • C12n - 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 g6 (not 9.Bd3) (2)
          • C12o - 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 g6 9.Bd3 (2)
          • C12p - 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 g6 9.Bd3 Nxd2 10.Kxd2 c5 (not 11.Nf3) (4)
          • C12q - 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 g6 9.Bd3 Nxd2 10.Kxd2 c5 11.Nf3 (not 11...Nc6) (1)
          • C12r - 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 g6 9.Bd3 Nxd2 10.Kxd2 c5 11.Nf3 Nc6 — Main Line (1)
        • 5.exd5 Qxd5 (1)
          • C12c - (not 6.Bxf6) (0)
          • C12c - 6.Bxf6 gxf6 7.Qd2 Qa5 (1)
      • C12b - 5.exd5 (not 5...Qxd5) (1)
      • C12d - 5.e5 (not 5...h6) (0)
      • C13a - 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 - French Defense: Classical Variation, Normal Variation (5)
        • 5.e5 Ne4 — Tartakower (2)
          • C13f - 5...Ne4 (not 6.Bxe7) (1)
          • C13g - 6.Bxe7 (1)
        • 5.e5 Nfd7 (3)
          • C13h - 5...Nfd7 (not 6.h4) (0)
          • C13i - 6.h4 (not 6...Bxg5, 6...O-O, 6...a6, 6...c5, 6...f6) (1)
          • C13j - 6.h4 f6 (0)
          • C13k - 6.h4 O-O (0)
          • C13l - 6.h4 Bxg5 (not 7.hxg5) (0)
          • C13l - 6.h4 Bxg5 7.hxg5 Qxg5 (0)
          • C13m - 6.h4 Bxg5 7.hxg5 Qxg5 8.Nh3 Qe7 9.Nf4 (1)
          • C13n - 6.h4 a6 (1)
          • C13o - 6.h4 a6 7.Qg4 Bxg5 (0)
          • C13p - 6.h4 c5 (not 7.Bxe7) (0)
          • C13q - 6.h4 c5 7.Bxe7 (not 7...Kxe7) (0)
          • C13r - 6.h4 c5 7.Bxe7 Kxe7 (0)
        • 5.e5 Ng8 (0)
          • C13d - (not 6.Be3) (0)
          • C13e - 6.Be3 b6 (0)
      • C13b - 5.Bxf6 (not 5...Bxf6) (0)
      • C13c - 5.Bxf6 Bxf6 6.e5 Be7 7.Qg4 (0)
      • C13d - 5.e5 (not 5...Ne4, 5...Nfd7, 5...Ng8) (0)
      • C14 - 1. e4 e6 2. d4 d5 3. Nc3 a6 4. Nf3 Nf6 5. e5 Nfd7 6. Bg5 - French Defense: Classical Variation (19)
        • 6...Qxe7 7.f4 a6 (10)
          • C14g - (not 8.Nf3) (1)
          • C14h - 8.Nf3 c5 (not 9.dxc5) (8)
          • C14i - 8.Nf3 c5 9.dxc5 (1)
        • 6...Qxe7 7.f4 O-O (5)
          • C14j - (not 8.Nf3) (0)
          • C14k - 8.Nf3 c5 (not 9.Qd2, 9.dxc5) (0)
          • C14l - 8.Nf3 c5 9.dxc5 (0)
          • C14m - 8.Nf3 c5 9.Qd2 (not 9...Nc6) (0)
          • C14m - 8.Nf3 c5 9.Qd2 Nc6 10.O-O-O c4 (4)
          • C14n - 8.Nf3 c5 9.Qd2 Nc6 10.dxc5 (not 10...Qxc5) (0)
          • C14o - 8.Nf3 c5 9.Qd2 Nc6 10.dxc5 Qxc5 (1)
        • C14a - 6...Qxe7 (not 7.Bd3, 7.Nb5, 7.Qd2, 7.Qg4, 7.f4) (1)
        • C14b - 6...Qxe7 7.Qg4 (0)
        • C14c - 6...Qxe7 7.Bd3 (0)
        • C14d - 6...Qxe7 7.Nb5 (1)
        • C14e - 6...Qxe7 7.Qd2 (1)
        • C14f - 6...Qxe7 7.f4 (not 7...O-O, 7...a6) (1)
      • C15a - 1. e4 e6 2. d4 d5 3. Nc3 Bb4 - French Defense: Winawer Variation (23)
        • 4.a3 Bxc3+ (9)
          • C15k - (not 5.bxc3) (0)
          • C15k - 5.bxc3 dxe4 (not 6.Qg4, 6.f3) (4)
          • C15l - 5.bxc3 dxe4 6.f3 (not 6...c5, 6...e5, 6...exf3) (0)
          • C15l - 5.bxc3 dxe4 6.f3 c5 (0)
          • C15l - 5.bxc3 dxe4 6.f3 e5 (0)
          • C15l - 5.bxc3 dxe4 6.f3 exf3 (0)
          • C15m - 5.bxc3 dxe4 6.Qg4 (5)
        • 4.Bd2 dxe4 (3)
          • C15h - 4...dxe4 (not 5.Qg4) (3)
          • C15i - 5.Qg4 (not 5...Nf6, 5...Qxd4) (0)
          • C15i - 5.Qg4 Qxd4 (0)
          • C15j - 5.Qg4 Nf6 (0)
        • 4.Bd3 c5 (0)
          • C15f - (not 5.exd5) (0)
          • C15f - 5.exd5 Qxd5 6.Bd2 (0)
        • 4.Bd3 dxe4 (1)
          • C15g - 4...dxe4 (not 5.Bxe4) (0)
          • C15g - 5.Bxe4 (not 5...Nf6) (0)
          • C15g - 5.Bxe4 Nf6 (1)
        • 4.Ne2 dxe4 (4)
          • C15q - (not 5.a3) (0)
          • C15q - 5.a3 Bxc3+ (0)
          • C15r - 5.a3 Bxc3+ 6.Nxc3 Nc6 (not 7.Bb5) (1)
          • C15s - 5.a3 Bxc3+ 6.Nxc3 Nc6 7.Bb5 (0)
          • C15t - 5.a3 Be7 (1)
          • C15u - 5.a3 Be7 6.Nxe4 Nf6 (not 7.Qd3) (0)
          • C15u - 5.a3 Be7 6.Nxe4 Nf6 7.N2g3 O-O 8.Be2 Nc6 (2)
          • C15v - 5.a3 Be7 6.Nxe4 Nf6 7.Qd3 (0)
      • C15b - 4.exd5 (not 4...Qxd5) (1)
      • C15b - 4.exd5 Qxd5 (0)
      • C15c - 4.Qg4 (0)
      • C15d - 4.Qd3 (not 4...dxe4) (0)
      • C15d - 4.Qd3 dxe4 (2)
      • C15e - 4.Bd3 (not 4...c5, 4...dxe4) (0)
      • C15h - 4.Bd2 (not 4...dxe4) (0)
      • C15k - 4.a3 (not 4...Bxc3+) (0)
      • C15k - 4.a3 Bxc3+ 5.bxc3 - Winawer Variation (1)
      • C15n - 4.Ne2 (not 4...Nc6, 4...Nf6) (0)
      • C15o - 4.Ne2 Nf6 (1)
      • C15p - 4.Ne2 Nc6 (1)
      • C16a - 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 - French Defense: Winawer Variation, Advance Variation (69)
        • 4...Qd7 5.a3 Bxc3+ (26)
          • C16i - 4...Qd7 5.a3 Bxc3+ 6.bxc3 b6 (not 7.Qg4) (0)
          • C16i - 6.bxc3 b6 7.Qg4 (5)
          • C16n - 6.bxc3 b6 (21)
      • C16b - 4...b6 (not 5.Qg4, 5.a3) (4)
      • C16c - 4...b6 5.Qg4 (not 5...Bf8) (10)
      • C16d - 4...b6 5.Qg4 Bf8 6.Bg5 (5)
      • C16e - 4...b6 5.a3 (not 5...Bf8) (0)
      • C16e - 4...b6 5.a3 Bf8 (2)
      • C16f - 4...Qd7 (not 5.Bd2, 5.a3) (8)
      • C16g - 4...Qd7 5.Bd2 (4)
      • C16h - 4...Qd7 5.a3 (not 5...Bxc3+) (2)
      • C16j - 4...Ne7 (not 5.Bd2, 5.a3) (2)
      • C16k - 4...Ne7 5.Bd2 (not 5...b6) (1)
      • C16l - 4...Ne7 5.Bd2 b6 (4)
      • C16m - 4...Ne7 5.a3 (not 5...Bxc3+) (0)
      • C17a - 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 - French Defense: Winawer Variation, Advance Variation (70)
        • 5.a3 Ba5 (49)
          • C17m - 5...Ba5 (not 6.b4) (10)
          • C17n - 6.b4 (0)
          • C17o - 6.b4 cxd4 7.Qg4 (10)
          • C17p - 6.b4 cxd4 7.Qg4 Ne7 8.bxa5 (10)
          • C17q - 6.b4 cxd4 7.Nb5 (0)
          • C17r - 6.b4 cxd4 7.Nb5 Bc7 8.f4 (not 8...Bd7) (3)
          • C17s - 6.b4 cxd4 7.Nb5 Bc7 8.f4 Bd7 (16)
        • 5.a3 cxd4 (0)
          • C17l - (not 6.axb4) (0)
          • C17l - 6.axb4 dxc3 7.Nf3 (0)
        • 5.Bd2 Ne7 (11)
          • C17g - 5...Ne7 (not 6.Nb5, 6.a3, 6.dxc5) (1)
          • C17h - 6.a3 (6)
          • C17i - 6.dxc5 (1)
          • C17j - 6.Nb5 (3)
      • C17b - 5.dxc5 (2)
      • C17c - 5.Qg4 (not 5...Ne7) (1)
      • C17d - 5.Qg4 Ne7 6.dxc5 (0)
      • C17e - 5.Bd2 (not 5...cxd4) (2)
      • C17f - 5.Bd2 cxd4 (0)
      • C17k - 5.a3 (not 5...Ba5, 5...cxd4) (0)
      • C18a - 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 - French Defense: Winawer Variation, Advance Variation (162)
        • 6...Ne7 7.h4 Nbc6 (6)
          • C18i - 7...Nbc6 (not 8.Nf3) (0)
          • C18i - 8.Nf3 (6)
        • 6...Ne7 7.h4 Qc7 (14)
          • C18h - 7...Qc7 (not 8.Nf3) (0)
          • C18h - 8.Nf3 (14)
        • 6...Ne7 7.Qg4 O-O (32)
          • C18n - 7...O-O (not 8.Bd3, 8.Nf3) (0)
          • C18o - 8.Bd3 (not 8...Nbc6) (19)
          • C18p - 8.Bd3 Nbc6 (12)
          • C18q - 8.Nf3 (not 8...Nbc6) (0)
          • C18q - 8.Nf3 Nbc6 (1)
        • 6...Ne7 7.Qg4 Qc7 — Main Line (33)
          • C18r - 7...Qc7 (not 8.Qxg7) (0)
          • C18r - 8.Qxg7 (not 8...Rg8) (0)
          • C18r - 8.Qxg7 Rg8 9.Qxh7 cxd4 10.Qd3 (7)
          • C18s - 8.Qxg7 Rg8 9.Qxh7 cxd4 10.Kd1 (1)
          • C18t - 8.Qxg7 Rg8 9.Qxh7 cxd4 10.Ne2 (8)
          • C18u - 8.Qxg7 Rg8 9.Qxh7 cxd4 10.Ne2 Nbc6 11.f4 Bd7 12.Qd3 dxc3 (not 13.Nxc3) (8)
          • C18v - 8.Qxg7 Rg8 9.Qxh7 cxd4 10.Ne2 Nbc6 11.f4 Bd7 12.Qd3 dxc3 13.Nxc3 — Main Line (9)
      • C18b - 6...Qa5 (21)
      • C18c - 6...Qc7 (not 7.Qg4) (2)
      • C18d - 6...Qc7 7.Qg4 (not 7...f5, 7...f6) (0)
      • C18d - 6...Qc7 7.Qg4 f6 (4)
      • C18e - 6...Qc7 7.Qg4 f5 (5)
      • C18f - 6...Ne7 (not 7.Qg4) (0)
      • C18g - 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.h4 - 6...Ne7 7.h4 (6)
      • C18j - 6...Ne7 7.Qg4 (not 7...Kf8, 7...Nbc6, 7...cxd4) (0)
      • C18k - 6...Ne7 7.Qg4 Nbc6 (0)
      • C18l - 6...Ne7 7.Qg4 Kf8 (19)
      • C18m - 6...Ne7 7.Qg4 cxd4 (5)
      • C19a - 2.d4 d5 3.Nc3 Bb4 4.e5 Ne7 5.a3 Bxc3+ 6.bxc3 c5 7.a4 - Smyslov Variation (2)
      • C19b - 7...Qa5 (0)
      • C19c - 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 - French Defense: Winawer Variation, Positional Variation (51)
        • 7...Nbc6 8.a4 Qa5 (11)
          • C19n - 8...Qa5 (not 9.Bd2, 9.Qd2) (0)
          • C19n - 9.Qd2 (not 9...Bd7) (1)
          • C19o - 9.Qd2 Bd7 (3)
          • C19p - 9.Bd2 (not 9...Bd7) (3)
          • C19q - 9.Bd2 Bd7 (not 10.Bb5) (1)
          • C19r - 9.Bd2 Bd7 10.Bb5 (3)
      • C19d - 7.Nf3 Qc7 (not 8.a4) (1)
      • C19e - 7.Nf3 Qc7 8.a4 (not 8...b6) (3)
      • C19f - 7...Qc7 8.a4 b6 (7)
      • C19h - 7...b6 8.a4 (5)
      • C19h - 7.Nf3 b6 (not 8.Bb5+, 8.a4) (0)
      • C19i - 7...b6 8.Bb5+ (5)
      • C19j - 7.Nf3 Bd7 (not 8.a4) (6)
      • C19k - 7...Bd7 8.a4 (0)
      • C19l - 7.Nf3 Nbc6 (not 8.a4) (4)
      • C19m - 7...Nbc6 8.a4 Bd7 (0)
      • C19m - 7.Nf3 Nbc6 8.a4 (not 8...Bd7) (0)
    • C20-C29 King's pawn game 1. e4 e5 (347)
      • 4...Nc6 - Falkbeer Variation (4)
      • C20 - 1. e4 e5 - King's Pawn Game (18)
        • C20 - 1. e4 e5 2. d3 - King's Pawn Game: Leonardis Variation (10)
      • C21 - 1. e4 e5 2. d4 exd4 - Center Game Accepted (5)
      • C22 - 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qc4 - Center Game: Hall Variation (16)
        • C22 - 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 - Center Game: Berger Variation (16)
      • C23 - 1. e4 e5 2. Bc4 - Bishop's Opening (0)
      • C24 - 1. e4 e5 2. Bc4 Nf6 - Bishop's Opening (88)
        • C24 - 1. e4 e5 2. Bc4 Nf6 3. d3 Bc5 - Bishop's Opening (1)
        • C24 - 1. e4 e5 2. Bc4 Nf6 3. d3 c6 - Bishop's Opening (10)
        • C24 - 1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 - Bishop's Opening (5)
          • C24 - 1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. a4 - Bishop's Opening: Berlin Defense (1)
          • C24 - 1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nc3 - Bishop's Opening: Vienna Hybrid (4)
      • C25a - 1. e4 e5 2. Nc3 - Vienna Game (48)
        • 2...Nc6 3.Bc4 Bc5 — Vienna (3)
          • C25j - 3...Bc5 (not 4.Qg4, 4.d3) (0)
          • C25k - 4.d3 (2)
          • C25l - 4.Qg4 (1)
        • 2...Nc6 3.f4 exf4 — Vienna (5)
          • C25m - 3...exf4 (not 4.Nf3, 4.d4) (0)
          • C25n - 4.d4 (not 4...Qh4+) (0)
          • C25n - 4.d4 Qh4+ 5.Ke2 b6 (0)
          • C25o - 4.d4 Qh4+ 5.Ke2 d5 (1)
          • C25p - 4.Nf3 (not 4...g5) (0)
          • C25p - 4.Nf3 g5 (not 5.d4, 5.h4) (0)
          • C25p - 4.Nf3 g5 5.Bc4 g4 6.O-O (not 6...gxf3) (0)
          • C25p - 4.Nf3 g5 5.Bc4 g4 6.O-O gxf3 7.Qxf3 Ne5 8.Qxf4 Qf6 (4)
          • C25q - 4.Nf3 g5 5.h4 (not 5...g4) (0)
          • C25q - 4.Nf3 g5 5.h4 g4 6.Ng5 d6 (0)
          • C25r - 4.Nf3 g5 5.d4 (not 5...g4) (0)
          • C25r - 4.Nf3 g5 5.d4 g4 6.Bc4 gxf3 7.O-O d5 8.exd5 Bg4 9.dxc6 (0)
      • C25b - 2...Bb4 (not 3.Qg4) (0)
      • C25b - 2...Bb4 3.Qg4 (0)
      • C25c - 2...d6 (not 3.Bc4) (0)
      • C25c - 2...d6 3.Bc4 (4)
      • C25d - 2...Bc5 (not 3.Bc4, 3.Na4, 3.Nf3) (0)
      • C25d - 2...Bc5 3.Na4 (1)
      • C25e - 2...Bc5 3.Bc4 (1)
      • C25f - 2...Bc5 3.Nf3 (0)
      • C25g - 1. e4 e5 2. Nc3 Nc6 - Vienna Game: Max Lange Defense (7)
        • 3.a3 - Max Lange Defense (2)
      • C25g - 2...Nc6 3.d4 (2)
      • C25h - 3.g3 - Paulsen Variation (9)
      • C25i - 2...Nc6 3.g3 Bc5 (8)
      • C25j - 2...Nc6 3.Bc4 (not 3...Bc5) (0)
      • C25m - 2...Nc6 3.f4 (not 3...exf4) (0)
      • C26a - 3.a3 - Mengarini Variation (2)
      • C26c - 3.g3 - Smyslov Variation (5)
      • C26d - 3.g3 Nc6 (not 4.Bg2) (0)
      • C26d - 4.Bg2 (1)
      • C26e - 3.g3 Bc5 (not 4.Bg2) (0)
      • C26e - 3.g3 Bc5 4.Bg2 (not 4...O-O, 4...d6) (7)
      • C26f - 4.Bg2 d6 (5)
      • C26g - 4.Bg2 O-O (2)
      • C26i - 3...d5 (not 4.Bg2, 4.Nf3, 4.f4, 4.d3, 4.exd5) (0)
      • C26l - 1. e4 e5 2. Bc4 Nf6 3. Nc3 (85)
        • 4.Bg2 Nc6 — Vienna (7)
          • C26h - 4...Nc6 (not 5.Nge2) (0)
          • C26h - 5.Nge2 (7)
        • 4.d3 d6 — Vienna (6)
          • C26s - 4...d6 (not 5.Na4, 5.f4) (4)
          • C26t - 5.Na4 (2)
          • C26u - 5.f4 (0)
        • 4.exd5 Nxd5 — Vienna (31)
          • C26i - 5.Bg2 (not 5...Nxc3) (5)
          • C26j - 5.Bg2 Nxc3 (16)
          • C26k - 5.Bg2 Nxc3 6.bxc3 Bd6 (10)
      • C26m - 3.Bc4 Bb4 (not 4.Nf3) (1)
      • C26n - 3.Bc4 Bb4 4.Nf3 (not 4...O-O) (2)
      • C26o - 4.Nf3 O-O (0)
      • C26p - 1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 - 1. e4 e5 2. Bc4 Nf6 3. Nc3 (5)
        • 4.Nge2 - Stanley Variation (1)
      • C26p - 4.f4 (0)
      • C26q - 4.Nf3 (1)
      • C26r - 4.d3 (13)
      • C27a - 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 - Vienna Game: Frankenstein-Dracula Variation (5)
        • 4.Qh5 Nd6 — Vienna (4)
          • C27d - 5.Qxe5+ (2)
          • C27e - 5.Bb3 (not 5...Be7, 5...Nc6) (0)
          • C27f - 5.Bb3 Be7 (2)
          • C27g - 5.Bb3 Be7 6.Nf3 Nc6 7.Nxe5 (0)
          • C27h - 5.Bb3 Nc6 (not 6.Nb5, 6.d4) (0)
          • C27h - 5.Bb3 Nc6 6.d4 (0)
          • C27h - 5.Bb3 Nc6 6.Nb5 (0)
          • C27i - 5.Bb3 Nc6 6.Nb5 g6 7.Qf3 f5 8.Qd5 Qe7 9.Nxc7+ Kd8 10.Nxa8 (0)
          • C27j - 5.Bb3 Nc6 6.Nb5 g6 7.Qf3 f5 8.Qd5 Qe7 9.Nxc7+ Kd8 10.Nxa8 b6 11.d3 (0)
      • C27b - 4.Nxe4 (0)
      • C27c - 4.Qh5 (not 4...Nd6) (0)
      • C28a - 1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 - Vienna Game: Stanley Variation, Three Knights Variation (64)
        • 4.d3 Bb4 — Vienna (15)
          • C28m - 4...Bb4 (not 5.Bg5, 5.Ne2, 5.Nf3) (0)
          • C28n - 5.Nf3 (7)
          • C28o - 5.Bg5 (0)
          • C28p - 5.Ne2 (8)
        • 4.d3 Bc5 — Vienna (12)
          • C28g - 4...Bc5 (not 5.Bg5, 5.f4) (4)
          • C28h - 5.Bg5 (3)
          • C28i - 5.f4 (2)
          • C28j - 5.f4 d6 6.Nf3 (not 6...Bg4, 6...a6) (2)
          • C28k - 5.f4 d6 6.Nf3 Bg4 (1)
          • C28l - 5.f4 d6 6.Nf3 a6 (0)
        • 4.d3 Na5 — Vienna (33)
          • C28e - 4...Na5 (not 5.Nge2) (13)
          • C28f - 5.Nge2 (20)
      • C28b - 4.f4 (not 4...Nxe4) (0)
      • C28b - 4.f4 Nxe4 5.Nf3 (0)
      • C28c - 4.d3 (not 4...Be7) (2)
      • C28d - 4.d3 Be7 (2)
      • C29a - 1. e4 e5 2. Nc3 Nf6 3. f4 - Vienna Game: Vienna Gambit (14)
        • 3...d5 4.fxe5 Nxe4 — Vienna (12)
          • C29f - 4...Nxe4 (not 5.Nf3, 5.Qf3, 5.d3) (0)
          • C29g - 5.d3 (not 5...Bb4, 5...Nxc3) (0)
          • C29g - 5.d3 Qh4+ 6.g3 Nxg3 7.Nf3 Qh5 8.Nxd5 (0)
          • C29h - 5.d3 Bb4 (not 6.dxe4) (0)
          • C29h - 5.d3 Bb4 6.dxe4 Qh4+ 7.Ke2 (0)
          • C29i - 5.d3 Nxc3 (0)
          • C29j - 5.d3 Nxc3 6.bxc3 d4 (0)
          • C29k - 5.Qf3 (not 5...Nc6, 5...Nxc3, 5...f5) (0)
          • C29k - 5.Qf3 Nc6 (2)
          • C29l - 5.Qf3 f5 (not 6.d4) (0)
          • C29l - 5.Qf3 f5 6.d4 (3)
          • C29m - 5.Qf3 Nxc3 (3)
          • C29n - 5.Nf3 (not 5...Bb4, 5...Be7, 5...Bg4, 5...Nc6) (1)
          • C29o - 5.Nf3 Bg4 (not 6.Qe2) (0)
          • C29o - 5.Nf3 Bg4 6.Qe2 (0)
          • C29p - 5.Nf3 Bb4 (0)
          • C29q - 5.Nf3 Nc6 (1)
          • C29r - 5.Nf3 Be7 (not 6.Qe2) (0)
          • C29s - 5.Nf3 Be7 6.Qe2 (not 6...Nxc3) (1)
          • C29t - 5.Nf3 Be7 6.Qe2 Nxc3 (not 7.dxc3) (0)
          • C29t - 5.Nf3 Be7 6.Qe2 Nxc3 7.dxc3 (1)
      • C29a - 3...exf4 (0)
      • C29b - 3...d6 (not 4.Nf3) (0)
      • C29b - 3...d6 4.Nf3 (0)
      • C29c - 3...d5 (not 4.d3, 4.exd5, 4.fxe5) (0)
      • C29d - 3...d5 4.exd5 (not 4...exf4) (0)
      • C29d - 3...d5 4.exd5 exf4 (1)
      • C29e - 3...d5 4.d3 (0)
      • C29f - 3...d5 4.fxe5 (not 4...Nxe4) (0)
    • C30-C39 1. e4 e5 2. f4 King's gambit (60)
      • C30a - 1. e4 e5 2. f4 - King's Gambit (1)
        • 2...Bc5 3.Nf3 d6 (0)
          • C30k - 3...d6 (not 4.Nc3, 4.b4, 4.c3, 4.fxe5) (0)
          • C30k - 4.b4 (0)
          • C30k - 4.fxe5 (0)
          • C30l - 4.Nc3 (not 4...Nd7) (0)
          • C30l - 4.Nc3 Nd7 (0)
          • C30m - 4.Nc3 Nf6 5.Bc4 (not 5...Nc6) (0)
          • C30m - 4.Nc3 Nf6 5.Bc4 Nc6 6.d3 Bg4 7.h3 Bxf3 8.Qxf3 exf4 (0)
          • C30n - 4.c3 (not 4...Bb6, 4...Nf6, 4...f5) (0)
          • C30n - 4.c3 Bg4 5.fxe5 dxe5 6.Qa4+ (0)
          • C30o - 4.c3 Bb6 (0)
          • C30p - 4.c3 Nf6 (not 5.d4) (0)
          • C30q - 4.c3 Nf6 5.d4 (not 5...Bb6) (0)
          • C30q - 4.c3 Nf6 5.d4 Bb6 (0)
          • C30q - 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb6 (0)
          • C30r - 4.c3 f5 (not 5.fxe5) (0)
          • C30r - 4.c3 f5 5.fxe5 dxe5 6.d4 exd4 7.Bc4 (0)
        • 2...Nc6 3.Nf3 f5 (0)
          • C30h - 3...f5 (not 4.exf5) (0)
          • C30i - 4.exf5 (not 4...e4) (0)
          • C30i - 4.exf5 e4 (not 5.Ne5) (0)
          • C30i - 4.exf5 e4 5.Ne5 Nf6 (0)
      • C30b - 2...c5 (0)
      • C30c - 2...d6 (not 3.Nf3) (0)
      • C30c - 2...d6 3.Nf3 (not 3...Nc6) (0)
      • C30c - 2...d6 3.Nf3 Nc6 (0)
      • C30d - 2...Nf6 (1)
      • C30e - 2...Qf6 (not 3.Nc3, 3.Nf3) (0)
      • C30e - 2...Qf6 3.Nc3 Qxf4 4.d4 (0)
      • C30e - 2...Qf6 3.Nf3 Qxf4 4.Nc3 Bb4 5.Bc4 (0)
      • C30f - 2...Qh4+ (not 3.g3) (0)
      • C30f - 2...Qh4+ 3.g3 Qe7 (0)
      • C30g - 2...Nc6 (not 3.Nf3) (0)
      • C30j - 2...Bc5 (not 3.Bc4, 3.Nf3) (0)
      • C30j - 2...Bc5 3.Bc4 (0)
      • C30j - 2...Bc5 3.Nf3 (not 3...g5) (0)
      • C30j - 2...Bc5 3.Nf3 g5 (0)
      • C31 - 1. e4 e5 2. f4 d5 - King's Gambit Declined (0)
      • C32 - 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 - King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit Accepted (1)
      • C33 - 1. e4 e5 2. f4 exf4 - King's Gambit Accepted (16)
      • C34 - 1. e4 e5 2. f4 exf4 3. Nf3 d6 - King's Gambit Accepted: Fischer Defense (11)
      • C34 - 1. e4 e5 2. f4 exf4 3. Nf3 Nc6 - King's Gambit Accepted: MacLeod Defense (1)
      • C35 - 1. e4 e5 2. f4 exf4 3. Nf3 Be7 - King's Gambit Accepted (3)
      • C36 - 1. e4 e5 2. f4 exf4 3. Nf3 d5 - King's Gambit Accepted: Modern Defense (16)
      • C37 - 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 - King's Gambit Accepted: King's Knight's Gambit (3)
      • C38 - 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 - King's Gambit Accepted: Traditional Variation (1)
      • C39 - 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 - King's Gambit Accepted: King's Knight's Gambit (7)
    • C41a - 1. e4 e5 2. Nf3 d6 - Philidor Defense (181)
      • 3.Bc4 f5 (3)
        • C41b - (not 4.d4) (0)
        • C41b - 4.d4 exd4 5.Ng5 Nh6 6.Nxh7 (3)
      • 3.d4 exd4 (57)
        • C41h - 3...exd4 (not 4.Nxd4, 4.Qxd4, 4.c3) (0)
        • C41h - 4.c3 (0)
        • C41i - 4.Qxd4 (not 4...Nc6, 4...Nf6) (0)
        • C41i - 4.Qxd4 Nc6 (0)
        • C41i - 4.Qxd4 Nf6 (not 5.Nc3) (0)
        • C41i - 4.Qxd4 Nf6 5.Nc3 (3)
        • C41j - 4.Nxd4 (not 4...g6) (0)
        • C41j - 4.Nxd4 d5 5.exd5 (0)
        • C41k - 4.Nxd4 Nf6 5.Nc3 (not 5...Be7) (0)
        • C41k - 4.Nxd4 Nf6 5.Nc3 Be7 (not 6.Bc4, 6.Be2) (34)
        • C41l - 4.Nxd4 Nf6 5.Nc3 Be7 6.Bc4 (4)
        • C41m - 4.Nxd4 Nf6 5.Nc3 Be7 6.Be2 (not 6...O-O) (0)
        • C41m - 4.Nxd4 Nf6 5.Nc3 Be7 6.Be2 O-O 7.O-O c5 8.Nf3 Nc6 9.Bg5 Be6 10.Re1 (16)
        • C41n - 4.Nxd4 g6 (0)
      • 3.d4 f5 (0)
        • C41d - 3...f5 (not 4.Nc3, 4.dxe5) (0)
        • C41d - 4.Nc3 (0)
        • C41e - 4.dxe5 (not 4...fxe4) (0)
        • C41e - 4.dxe5 fxe4 5.Ng5 d5 6.e6 (not 6...Bc5) (0)
        • C41e - 4.dxe5 fxe4 5.Ng5 d5 6.e6 Bc5 7.Nc3 (0)
        • C41e - 4.dxe5 fxe4 5.Ng5 d5 6.Nc3 (0)
      • 3.d4 Nd7 (2)
        • C41f - 3...Nd7 (not 4.Bc4) (0)
        • C41f - 4.Bc4 (not 4...c6) (0)
        • C41g - 4.Bc4 c6 (not 5.Nc3, 5.Ng5, 5.O-O, 5.c3) (0)
        • C41g - 4.Bc4 c6 5.c3 (0)
        • C41g - 4.Bc4 c6 5.Nc3 (0)
        • C41g - 4.Bc4 c6 5.Ng5 (not 5...Nh6) (0)
        • C41g - 4.Bc4 c6 5.Ng5 Nh6 6.f4 Be7 7.O-O O-O 8.c3 d5 (2)
        • C41g - 4.Bc4 c6 5.O-O (not 5...Be7) (0)
        • C41g - 4.Bc4 c6 5.O-O Be7 6.dxe5 (0)
      • 3.d4 Nf6 — Exchange (114)
        • C41o - 3...Nf6 (not 4.Bc4, 4.Nc3, 4.dxe5) (0)
        • C41o - 4.Bc4 (0)
        • C41p - 4.dxe5 (not 4...Nxe4) (0)
        • C41p - 4.dxe5 Nxe4 5.Nbd2 (3)
        • C41p - 4.dxe5 Nxe4 5.Qd5 (0)
        • C41q - 4.Nc3 (0)
        • C41s - 4.Nc3 Nbd7 5.Bc4 (not 5...Be7) (0)
        • C41s - 4.Nc3 Nbd7 5.Bc4 Be7 (not 6.Bxf7+, 6.Ng5, 6.O-O, 6.dxe5) (0)
        • C41s - 4.Nc3 Nbd7 5.Bc4 Be7 6.Bxf7+ (0)
        • C41s - 4.Nc3 Nbd7 5.Bc4 Be7 6.dxe5 (not 6...Nxe5, 6...dxe5) (0)
        • C41s - 4.Nc3 Nbd7 5.Bc4 Be7 6.dxe5 dxe5 (0)
        • C41s - 4.Nc3 Nbd7 5.Bc4 Be7 6.dxe5 Nxe5 (0)
        • C41s - 4.Nc3 Nbd7 5.Bc4 Be7 6.Ng5 (not 6...O-O) (0)
        • C41s - 4.Nc3 Nbd7 5.Bc4 Be7 6.Ng5 O-O 7.Bxf7+ (2)
        • C41t - 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O (not 6...O-O) (5)
        • C41u - 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O O-O (not 7.Qe2, 7.a4) (15)
        • C41v - 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O O-O 7.a4 (not 7...c6) (0)
        • C41v - 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O O-O 7.a4 c6 (not 8.Qe2) (42)
        • C41w - 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O O-O 7.a4 c6 8.Qe2 (0)
        • C41w - 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O O-O 7.Qe2 (not 7...c6) (0)
        • C41w - 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O O-O 7.Qe2 c6 8.a4 exd4 (2)
        • C41y - 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O O-O 7.Re1 c6 8.a4 a5 (19)
        • C41z - 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O O-O 7.Re1 c6 8.a4 b6 (7)
    • C41b - 3.Bc4 (not 3...Be7, 3...f5) (0)
    • C41b - 3.Bc4 Be7 4.c3 (0)
    • C41c - 3.d4 (not 3...Nd7, 3...Nf6, 3...exd4, 3...f5) (0)
    • C41k - 4...Nf6 - Exchange Variation (4)
    • C41o - 3.d4 Nf6 4.Ng5 - Locock Variation (0)
    • C41r - 1.e4 d6 2.d4 Nf6 3.Nc3 e5 4.Nf3 Nbd7 - Improved Hanham (30)
    • C42a - C42 – 1. e4 e5 2. Nf3 Nf6 – Petrov’s Defense xx (952)
      • 3.Bc4 Nxe4 (0)
        • C42f - 4.Nc3 (not 4...Nxc3) (0)
        • C42f - 4.Nc3 Nxc3 (0)
      • 3.Nc3 Bb4 (12)
        • C42c - 3...Bb4 (not 4.Nxe5) (4)
        • C42d - 4.Nxe5 (8)
      • 3.Nxe5 d6 — Vienna (835)
        • C42g - 3...d6 (not 4.Nf3, 4.Nxf7) (0)
        • C42h - 4.Nxf7 (not 4...Kxf7) (0)
        • C42h - 4.Nxf7 Kxf7 5.d4 (3)
        • C42j - 4.Nf3 (33)
        • C42n - 4.Nf3 Nxe4 5.Qe2 Qe7 6.d3 Nf6 7.Bg5 Nbd7 (15)
        • C42o - 4.Nf3 Nxe4 5.Qe2 Qe7 6.d3 Nf6 7.Bg5 Qxe2+ (20)
        • C42p - 4.Nf3 Nxe4 5.d4 (not 5...Nf6, 5...d5) (0)
        • C42p - 4.Nf3 Nxe4 5.d4 d5 (not 6.Bd3) (0)
        • C42p - 4.Nf3 Nxe4 5.d4 Nf6 (12)
        • C42q - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 (not 6...Bd6, 6...Be7) (0)
        • C42q - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.O-O O-O 8.c4 Bg4 (not 9.cxd5) (0)
        • C42q - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.O-O O-O 8.c4 Bg4 9.cxd5 f5 10.Re1 Bxh2+ (52)
        • C42r - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.O-O O-O 8.c4 c6 (115)
        • C42s - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O O-O (71)
        • C42t - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c4 (53)
        • C42u - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c4 Nb4 9.Be2 O-O — Main Line (132)
        • C42v - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1 (not 8...Bf5, 8...Bg4) (0)
        • C42v - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1 Bf5 (27)
        • C42w - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1 Bg4 (not 9.c4) (27)
        • C42w - 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1 Bg4 9.c4 (19)
      • C42 - 1. e4 e5 2. Nf3 Nf6 3....... - Petrov's Defense (338)
        • 3.Nxe5 d6 4.Nd3 (2)
        • 3.Nxe5 d6 4.Nf3 Nxe4 5.Bd3 (9)
        • 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bf5 - Classical Attack (5)
        • 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Nc6 (5)
        • C42 - 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 - Petrov's Defense: Nimzowitsch Attack (237)
          • 5...Nf6 6.d4 Be7 7.Bf4 O-O - Nimzowitsch Attack (1)
          • 5...Nf6 6.d4 Be7 7.h3 O-O - Nimzowitsch Attack (1)
          • 5...Nxc3 6.dxc3 Be7 7.Be3 Nc6 - Nimzowitsch Attack (2)
          • 5...Nxc3 6.dxc3 Be7 7.Be3 Nd7 - Nimzowitsch Attack (3)
          • 5...Nxc3 6.dxc3 Be7 7.Be3 O-O - Nimzowitsch Attack (3)
          • 5...Nxc3 6.dxc3 Be7 7.Bf4 Nc6 - Nimzowitsch Attack (2)
          • 5...Nxc3 6.dxc3 Be7 7.Bf4 O-O - Nimzowitsch Attack (1)
        • C42b - 3.d3 (3)
        • C42i - 3.Nxe5 d6 4.Nc4 - Paulsen Attack (17)
        • C42k - 3.Nxe5 d6 4.Nf3 Nxe4 5.d3 - French Attack (20)
        • C42l - 3.Nxe5 d6 4.Nf3 Nxe4 5.c4 - Vienna/Kaufmann (7)
        • C42m - 3.Nxe5 d6 4.Nf3 Nxe4 5.Nc3 - Nimzowitsch Attack (1)
        • C42n - 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2 - Cozio/Lasker (2)
        • C42q - 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 - Petrov's Defense: Classical Attack, Marshall Variation (16)
          • 7.O-O O-O 8.c4 c6 9.c5 - Marshall Variation (1)
          • 7.O-O O-O 8.c4 c6 9.Nc3 - Marshall Variation (3)
          • 7.O-O O-O 8.c4 c6 9.Qc2 - Marshall Variation (2)
          • 7.O-O O-O 8.c4 c6 9.Re1 - Marshall Variation (8)
          • 7.O-O O-O 8.Re1 Bf5 9.c4 - Marshall Variation (1)
          • 7.O-O O-O 8.Re1 Bf5 9.Nc3 - Marshall Variation (1)
        • C42s - 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 - Petrov's Defense: Classical Attack (12)
          • 7.O-O Bf5 - Classical Attack (5)
        • C42s - 7.O-O Nc6 - Classical Attack (7)
    • C42c - 3.Nc3 (not 3...Bb4) (0)
    • C42e - 3.Bc4 (not 3...Nxe4) (0)
    • C42g - 3.Nxe5 (not 3...Nxe4) (0)
    • C42g - 3.Nxe5 Nxe4 (22)
    • C43a - 1. e4 e5 2. Nf3 Nf6 3. d4 - Petrov's Defense: Modern Attack (168)
    • C43c - 3...exd4 4.e5 Ne4 - Modern Attack (2)
    • C43c - 4...Ne4 5.Bb5 (0)
    • C43c - 4...Ne4 5.Qe2 (not 5...Nc5) (0)
    • C43c - 4...Ne4 5.Qe2 Nc5 6.Nxd4 Nc6 (0)
    • C43d - 4...Ne4 5.Qxd4 (not 5...d5) (3)
    • C43f - 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 - Petrov's Defense: Modern Attack (138)
      • 4.dxe5 - Modern Attack (2)
    • C43g - 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 - Petrov's Defense: Modern Attack, Center Variation (136)
      • 4...d5 5.dxe5 Nc5 - Center Variation (1)
      • 4...d5 5.Nxe5 Bd6 (9)
        • C43n - 6.O-O O-O 7.c4 Bxe5 (4)
      • 4...d5 5.Nxe5 Nd7 — Main Line (76)
        • C43p - 6.Qe2 (3)
        • C43r - 6.Nxd7 Bxd7 7.O-O (not 7...Bd6, 7...Qh4) (4)
        • C43s - 6.Nxd7 Bxd7 7.O-O Qh4 — Main Line (7)
        • C43t - 6.Nxd7 Bxd7 7.O-O Bd6 (not 8.c4) (10)
        • C43u - 6.Nxd7 Bxd7 7.O-O Bd6 8.c4 — Main Line (22)
      • 4...Nc6 5.Nxe5 Nxe5 - Center Variation (1)
      • 4...Ne4 5.Qxd4 d5 — Main Line (7)
        • C43e - 6.exd6 Nxd6 7.Nc3 (not 7...Nc6) — Main Line (0)
        • C43e - 6.exd6 Nxd6 7.Nc3 Nc6 8.Qf4 Bf5 — Pillsbury (7)
    • C43g - 3...Nxe4 4.Bd3 Nc6 (not 5.Bxe4, 5.d5) (0)
    • C43g - 4...Nc6 5.d5 (6)
    • C43h - 4...Nc6 5.Bxe4 (1)
    • C43i - 3...Nxe4 4.Bd3 d5 (not 5.Nxe5, 5.dxe5) (0)
    • C43i - 4...d5 5.dxe5 (12)
    • C43j - 3...Nxe4 4.Bd3 d5 5.Nxe5 (not 5...Bd6, 5...Be7, 5...Nc6) (0)
    • C43k - 4...d5 5.Nxe5 Nc6 (2)
    • C43l - 4...d5 5.Nxe5 Be7 (2)
    • C43m - 4...d5 5.Nxe5 Bd6 - Center Variation (6)
    • C43o - 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Nd7 - Petrov's Defense: Modern Attack, Center Variation (42)
      • 6.Nc3 - Center Variation (4)
      • 6.O-O - Center Variation (4)
    • C43q - 6.Nxd7 - Center Variation (10)
    • C44a - 1. e4 e5 2. Nf3 Nc6 - King's Knight Opening: Normal Variation (96)
      • 3.c3 Nf6 4.d3 d5 (1)
    • C44a - 3.b4 (not 3...Nf6, 3...d5, 3...Be7, 3...Nge7, 3...f5, 3...Nxd4, 3...d6, 3...exd4, 4.Bc4, 4.c3, 4.d4) (0)
    • C44a - 3.c4 (not 3...Nf6, 3...d5, 3...Be7, 3...Nge7, 3...f5, 3...Nxd4, 3...d6, 3...exd4, 4.Bc4, 4.c3, 4.d4) (0)
    • C44a - 3.Nxe5 (not 3...Nf6, 3...d5, 3...Be7, 3...Nge7, 3...f5, 3...Nxd4, 3...d6, 3...exd4, 4.Bc4, 4.c3, 4.d4) (0)
    • C44b - 1. e4 e5 2. Nf3 Nc6 3. g3 - King's Knight Opening: Konstantinopolsky (85)
      • 3...exd4 4.Bc4 Bc5 (5)
        • C44y - 4...Bc5 (not 5.Ng5, 5.O-O, 5.c3) (0)
        • C44y - 5.Ng5 (not 5...Nh6) (0)
        • C44y - 5.Ng5 Nh6 6.Qh5 (0)
        • C44y - 5.O-O (not 5...d6) (0)
        • C44y - 5.O-O d6 6.c3 Bg4 (5)
        • C44z - 5.c3 (not 5...d3) (0)
        • C44z - 5.c3 d3 (0)
      • 3...exd4 4.c3 dxc3 (1)
        • C44w - 4...dxc3 (not 5.Bc4, 5.Nxc3) (0)
        • C44w - 5.Bc4 (not 5...cxb2) (0)
        • C44w - 5.Bc4 cxb2 6.Bxb2 (0)
        • C44w - 5.Nxc3 (not 5...Bb4) (0)
        • C44w - 5.Nxc3 Bb4 (not 6.Bc4) (0)
        • C44w - 5.Nxc3 Bb4 6.Bc4 d6 (not 7.O-O) (0)
        • C44w - 5.Nxc3 Bb4 6.Bc4 d6 7.O-O (1)
        • C44w - 5.Nxc3 Bb4 6.Bc4 Nf6 (0)
      • 3...f5 4.d4 d6 (1)
        • C44j - 5.d5 (not 5...fxe4) (0)
        • C44j - 5.d5 fxe4 6.Ng5 Nb8 7.Nxe4 Nf6 8.Bd3 Be7 (1)
      • 3...Nf6 4.d4 Nxe4 (5)
        • C44p - (not 5.d5) (0)
        • C44p - 5.d5 Bc5 (1)
        • C44q - 5.d5 Ne7 (4)
    • C44c - 1. e4 e5 2. Nf3 Nc6 3. Be2 - King's Pawn Game: Tayler Opening (13)
      • C44 - 1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 - King's Pawn Game: Tayler Opening (13)
        • C44g - 1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d3 - King's Pawn Game: Tayler Opening (13)
          • 4...Bc5 - Tayler Opening (2)
          • C44 - 1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d3 d5 - King's Pawn Game: Tayler Opening (10)
            • C44h - 5.Nbd2 - Inverted Hanham (8)
    • C44c - 3...Nf6 4.d4 (0)
    • C44d - 3...d5 (1)
    • C44d - 3.d3 - Inverted Philidor (2)
    • C44e - 3.d3 Nf6 (not 4.g3) (2)
    • C44f - 3...Nf6 4.g3 (37)
    • C44i - 3...Be7 (0)
    • C44i - 3...Nge7 (0)
    • C44i - 3.c3 (not 3...Be7, 3...Nf6, 3...Nge7, 3...d5, 3...f5) (0)
    • C44j - 3...f5 (not 4.d4) (0)
    • C44k - 3.c3 d5 (not 4.Qa4) (2)
    • C44l - 3...d5 4.Qa4 Bd7 (1)
    • C44l - 3...d5 4.Qa4 Nf6 (0)
    • C44l - 3.c3 d5 4.Qa4 (not 4...Bd7, 4...Nf6, 4...f6) (0)
    • C44m - 3...d5 4.Qa4 f6 (1)
    • C44n - 3.c3 Nf6 (not 4.d4) (0)
    • C44n - 3.c3 Nf6 4.d4 (not 4...exd4) (5)
    • C44o - 3...Nf6 4.d4 exd4 (1)
    • C44r - 3...Nxd4 (not 4.Nxe5) (0)
    • C44r - 3...Nxd4 4.Nxe5 Ne6 5.Bc4 c6 6.O-O Nf6 7.Nxf7 (0)
    • C44r - 3.d4 (not 3...Nxd4, 3...d6) (0)
    • C44s - 3...d6 (0)
    • C44t - 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4.... - Scotch Game (384)
      • 4.Nxd4 Bc5 (168)
        • C45o - 5.Nb3 Bb4+ (4)
        • C45p - 5.Nb3 Bb6 (not 6.a4) (0)
        • C45p - 5.Nb3 Bb6 6.a4 (not 6...a6) (34)
        • C45q - 5.Nb3 Bb6 6.a4 a6 (not 7.Nc3) (0)
        • C45q - 5.Nb3 Bb6 6.a4 a6 7.Nc3 (not 7...Nf6, 7...Qf6) (0)
        • C45q - 5.Nb3 Bb6 6.a4 a6 7.Nc3 Nf6 (5)
        • C45q - 5.Nb3 Bb6 6.a4 a6 7.Nc3 Qf6 (0)
        • C45r - 5.Nxc6 (40)
        • C45s - 5.Nxc6 Qf6 6.Qd2 (7)
        • C45t - 5.Nxc6 Qf6 6.Qd2 dxc6 7.Nc3 (15)
        • C45v - 5.Be3 Qf6 6.c3 (not 6...Nge7) (0)
        • C45v - 5.Be3 Qf6 6.Nb5 (2)
        • C45w - 5.Be3 Qf6 6.c3 Nge7 (not 7.Bb5, 7.Nc2, 7.Qd2) (19)
        • C45w - 5.Be3 Qf6 6.c3 Nge7 7.Bb5 (not 7...Nd8) (0)
        • C45w - 5.Be3 Qf6 6.c3 Nge7 7.Bb5 Nd8 (19)
        • C45w - 5.Be3 Qf6 6.c3 Nge7 7.Nc2 (0)
        • C45w - 5.Be3 Qf6 6.c3 Nge7 7.Qd2 (0)
        • C45y - 5.Be3 Qf6 6.c3 Nge7 7.Bc4 Ne5 (18)
      • 4.Nxd4 Nf6 — Tartakower (152)
        • C45h - 5.Nxc6 (not 5...bxc6) (0)
        • C45j - 5...bxc6 6.e5 Qe7 (not 7.Qe2) (0)
        • C45j - 5.Nxc6 bxc6 6.e5 Qe7 7.Qe2 (40)
        • C45k - 5...bxc6 6.e5 Qe7 7.Qe2 Nd5 8.c4 (not 8...Ba6) (37)
        • C45l - 5...bxc6 6.e5 Qe7 7.Qe2 Nd5 8.c4 Ba6 (not 9.b3) (9)
        • C45m - 5.Nxc6 bxc6 6.e5 Qe7 7.Qe2 Nd5 8.c4 Ba6 9.b3 (24)
      • 4.Nxd4 Nxd4 (0)
        • C45b - (not 5.Qxd4) (0)
        • C45b - 5.Qxd4 d6 6.Bd3 (0)
      • 4.Nxd4 Qh4 (0)
        • C45e - 4...Qh4 (not 5.Nb5, 5.Nc3, 5.Nf3, 5.Qd3) (0)
        • C45e - 5.Nf3 (0)
        • C45e - 5.Qd3 (0)
        • C45f - 5.Nc3 (0)
        • C45g - 5.Nb5 (not 5...Bb4+, 5...Bc5, 5...Qxe4+) (0)
        • C45g - 5.Nb5 Bb4+ (not 6.Bd2) (0)
        • C45g - 5.Nb5 Bb4+ 6.Bd2 (not 6...Qxe4+) (0)
        • C45g - 5.Nb5 Bb4+ 6.Bd2 Qxe4+ 7.Be2 Kd8 8.O-O Bxd2 9.Nxd2 Qg6 (0)
        • C45g - 5.Nb5 Bb4+ 6.Nd2 Qxe4+ 7.Be2 Qxg2 8.Bf3 Qh3 9.Nxc7+ Kd8 10.Nxa8 Nf6 11.a3 (0)
        • C45g - 5.Nb5 Bc5 (not 6.Qf3) (0)
        • C45g - 5.Nb5 Bc5 6.Qf3 (0)
        • C45g - 5.Nb5 Qxe4+ (0)
    • C44t - 3...exd4 4.Bb5 (0)
    • C44t - 3.d4 exd4 4.c3 (not 4...d3, 4...d5) (0)
    • C44u - 3...exd4 4.c3 d5 (2)
    • C44v - 3...exd4 4.c3 d3 (0)
    • C45a - 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 - Scotch Game (29)
    • C45c - 4.Nxd4 Bb4+ (17)
    • C45d - 4...Qf6 (20)
    • C45h - 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 - Scotch Game (16)
      • 5.Nc3 Bb4 6.Nxc6 (0)
      • 5.Nxc6 bxc6 6.Qe2 (3)
    • C45h - 5.Nxc6 bxc6 6.Nd2 - Tartakower Variation (24)
    • C45i - 5.Nxc6 bxc6 6.Bd3 - 4.Nxd4 Nf6 5.Nxc6 bxc6 6.Bd3 (27)
    • C45j - 5.Nxc6 bxc6 6.e5 - Mieses Variation (4)
    • C45n - 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 - Scotch Game (12)
      • 5.Nxc6 Qf6 (1)
    • C45o - 5.Nb3 - 4.Nxd4 Bc5 5.Nb3 (2)
    • C45u - 5.Be3 - Classical Variation (6)
    • C46a - 1. e4 e5 2. Nf3 Nc6 3. Nc3 - Three Knights Opening (9)
      • 3...g6 4.d4 exd4 (4)
        • C46k - 5.Nd5 (0)
        • C46l - 5.Nxd4 (not 5...Bg7) (0)
        • C46l - 5.Nxd4 Bg7 (not 6.Be3) (0)
        • C46l - 5.Nxd4 Bg7 6.Be3 (not 6...Nf6) (3)
        • C46m - 5.Nxd4 Bg7 6.Be3 Nf6 (1)
    • C46b - 3...f5 (0)
    • C46c - 3...d6 (not 4.d4) (1)
    • C46d - 3...d6 4.d4 (0)
    • C46e - 3...Bc5 (not 4.Bb5, 4.Nxe5) (0)
    • C46e - 3...Bc5 4.Bb5 (0)
    • C46f - 3...Bc5 4.Nxe5 (1)
    • C46g - 3...Bb4 (not 4.Nd5) (0)
    • C46h - 3...Bb4 4.Nd5 (not 4...Nf6) (0)
    • C46h - 3...Bb4 4.Nd5 Nf6 (0)
    • C46i - 3...g6 (not 4.d4) (1)
    • C46j - 3...g6 4.d4 (not 4...exd4) (0)
    • C48a - 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 - Four Knights Game: Spanish Variation (136)
      • 4...Bc5 5.O-O O-O (6)
        • C48f - 6.Nxe5 Nd4 (0)
        • C48f - 6.Nxe5 Nxe5 7.d4 Bd6 8.f4 Nc6 9.e5 Bb4 (6)
      • 4...Bd6 - Spanish Variation (11)
      • 4...Nd4 5.Ba4 Bc5 (12)
        • C48q - 5...Bc5 (not 6.Nxe5) (2)
        • C48r - 6.Nxe5 (10)
      • 4...Nd4 5.Ba4 c6 (12)
        • C48o - 5...c6 (not 6.Nxe5) (4)
        • C48p - 6.Nxe5 (8)
      • 4...Nd4 5.Nxd4 exd4 — Exchange (19)
        • C48k - 6.e5 dxc3 7.exf6 (7)
        • C48l - 6.e5 dxc3 7.exf6 Qxf6 8.dxc3 Bc5 (5)
        • C48m - 6.e5 dxc3 7.exf6 Qxf6 8.dxc3 Qe5+ (7)
    • C48a - 4...a6 5.Bxc6 (not 5...dxc6) (0)
    • C48a - 4...a6 5.Bxc6 dxc6 6.Nxe5 Nxe4 7.Nxe4 Qd4 8.O-O Qxe5 9.Re1 Be6 10.d4 Qd5 (23)
    • C48b - 4...d6 (not 5.d4) (0)
    • C48c - 4...d6 5.d4 (2)
    • C48d - 4...Bc5 (not 5.Nxe5, 5.O-O) (4)
    • C48e - 4...Bc5 5.Nxe5 (0)
    • C48f - 4...Bc5 5.O-O (not 5...O-O) (0)
    • C48g - 4...Nd4 (not 5.Ba4, 5.Bc4, 5.Be2, 5.Nxd4, 5.Nxe5, 5.O-O) (8)
    • C48g - 4...Nd4 5.Be2 (0)
    • C48h - 4...Nd4 5.Nxe5 (not 5...Qe7) (0)
    • C48h - 4...Nd4 5.Nxe5 Qe7 6.f4 (1)
    • C48i - 4...Nd4 5.O-O (6)
    • C48j - 4...Nd4 5.Bc4 (27)
    • C48k - 4...Nd4 5.Nxd4 (not 5...exd4) (0)
    • C48n - 4...Nd4 5.Ba4 (not 5...Nxf3+) (0)
    • C48n - 4...Nd4 5.Ba4 Nxf3+ (4)
    • C49a - 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 - Four Knights Game: Spanish Variation, Double Spanish (64)
      • 5.O-O O-O — Janowski (55)
        • C49c - 6.Nd5 Nxd5 7.exd5 e4 (0)
        • C49e - 6.d3 (not 6...d6) (0)
        • C49f - 6.d3 Bxc3 7.bxc3 d5 (0)
        • C49f - 6.d3 Bxc3 7.bxc3 d6 8.Re1 (10)
        • C49g - 6.d3 d6 (not 7.Bg5, 7.Ne2) (1)
        • C49h - 6.d3 d6 7.Ne2 (7)
        • C49i - 6.d3 d6 7.Bg5 (not 7...Be6, 7...Bxc3, 7...Ne7) (0)
        • C49j - 6.d3 d6 7.Bg5 Be6 (0)
        • C49k - 6.d3 d6 7.Bg5 Ne7 (not 8.Nh4) — Pillsbury (0)
        • C49k - 6.d3 d6 7.Bg5 Ne7 8.Nh4 c6 9.Bc4 d5 10.Bb3 Qd6 (3)
        • C49l - 6.d3 d6 7.Bg5 Bxc3 (not 8.bxc3) (0)
        • C49l - 6.d3 d6 7.Bg5 Bxc3 8.bxc3 (not 8...Qe7, 8...h6) (10)
        • C49m - 6.d3 d6 7.Bg5 Bxc3 8.bxc3 h6 (5)
        • C49n - 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 (not 9.Re1) (0)
        • C49n - 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8 10.d4 (not 10...Bg4, 10...Ne6) (1)
        • C49o - 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8 10.d4 Bg4 — Capablanca (0)
        • C49p - 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8 10.d4 Ne6 (3)
        • C49q - 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8 10.d4 Ne6 11.Bc1 Rd8 (5)
        • C49r - 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8 10.d4 Ne6 11.Bc1 c5 (4)
    • C49b - 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O - Four Knights Game: Spanish Variation, Double Spanish (8)
      • 5...Bxc3 - Double Spanish (1)
    • C49c - 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O - Four Knights Game: Spanish Variation, Double Spanish (3)
      • 6.Nd5 - Double Spanish (1)
    • C49d - 6.Bxc6 - Nimzowitsch (Paulsen) Variation (10)
    • C49f - 6.d3 Bxc3 - 6.d3 Bxc3 (2)
    • C50-C59 1. e4 e5 2. Nf3 Nc6 3. Bc4 Italian Game (1822)
      • 3...Nf6 4.d3 Bc5 5.Nbd2 (1)
      • C50 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 - Italian Game (464)
        • 3...Bc5 4.d3 f5 (8)
          • C50n - (not 5.Ng5) (0)
          • C50n - 5.Ng5 f4 (8)
        • 3...Bc5 4.d3 Nf6 (354)
          • C50s - 5...d6 (not 6.Be3, 6.Bg5) (11)
          • C50t - 5.Nc3 d6 6.Be3 (2)
          • C50u - 6.Bg5 (not 6...h6) (0)
          • C50v - 5.Nc3 d6 6.Bg5 h6 (10)
        • 3...Bc5 4.O-O Nf6 (6)
          • C50l - 4...Nf6 (not 5.Nc3) (4)
          • C50m - 5.Nc3 (2)
        • 3...Be7 4.d4 exd4 — Tartakower (0)
          • C50f - (not 5.c3) (0)
          • C50f - 5.c3 Nf6 6.e5 Ne4 (0)
        • 3...Na5 4.Nxe5 Nxc4 (1)
        • C50b - 3...f5 (0)
        • C50c - 3...Nd4 (0)
        • C50d - 3...d6 (13)
        • C50e - 3...Be7 (not 4.d4) (1)
        • C50g - 3...Be7 4.d4 d6 (2)
        • C50h - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 - Italian Game: Giuoco Piano (70)
        • C50h - 3...Bc5 4.Bxf7+ (0)
        • C50h - 3...Bc5 4.d4 (0)
        • C50i - 4.Nc3 - Three Knights Variation (6)
        • C50j - 3...Bc5 4.Nc3 Nf6 (0)
        • C50k - 4.O-O - Giuoco Piano (16)
        • C50n - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 - Italian Game: Giuoco Pianissimo (323)
          • 4...d6 - Giuoco Piano (9)
          • C50 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 - Italian Game: Giuoco Pianissimo, Normal (314)
            • 5.a3 - Giuoco Piano (1)
            • 5.a4 - Giuoco Piano (1)
            • 5.a4 - Normal (2)
            • 5.Be3 - Giuoco Piano (1)
            • 5.Be3 - Normal (4)
            • 5.Bg5 - Giuoco Piano (10)
            • 5.h3 - Normal (1)
            • 5.Nbd2 - Giuoco Pianissimo (1)
            • 5.O-O - Giuoco Piano (3)
            • C50p - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. O-O - Italian Game: Giuoco Pianissimo, Normal (204)
              • 5...O-O - Normal (3)
            • C50q - 5...d6 - Normal (34)
            • C50r - 5.Nc3 - Italian Four Knights (60)
        • C50o - 3...Nf6 4.d3 Bc5 (94)
      • C51 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 - Italian Game: Evans Gambit (17)
      • C52 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 - Italian Game: Evans Gambit, Main Line (11)
      • C53 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4.c3 - Italian Game (10)
      • C54 (1)
      • C54a - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 - Italian Game: Classical Variation, Giuoco Pianissimo (943)
        • 5.d3 d6 (573)
        • 5.d4 exd4 (82)
          • C54k - 6.e5 (not 6...d5) (0)
          • C54k - 6.e5 d5 (not 7.Bb5) (0)
          • C54k - 6.e5 d5 7.Bb5 Ne4 8.cxd4 Bb4+ (0)
          • C54k - 6.e5 Ne4 7.Bd5 Nxf2 8.Kxf2 dxc3+ 9.Kg3 (64)
          • C54l - 6.cxd4 (not 6...Bb4+) (0)
          • C54l - 6.cxd4 Bb4+ (not 7.Bd2, 7.Kf1, 7.Nc3) (0)
          • C54l - 6.cxd4 Bb4+ 7.Kf1 (7)
          • C54m - 6.cxd4 Bb4+ 7.Bd2 (not 7...Nxe4) (0)
          • C54m - 6.cxd4 Bb4+ 7.Bd2 Nxe4 8.Bxb4 Nxb4 9.Bxf7+ Kxf7 10.Qb3+ d5 11.Ne5+ Kf6 12.f3 (9)
          • C54n - 6.cxd4 Bb4+ 7.Nc3 (not 7...Nxe4) (0)
          • C54n - 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Nxc3 (not 9.bxc3) (0)
          • C54n - 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Nxc3 9.bxc3 Bxc3 10.Ba3 (0)
          • C54n - 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Nxc3 9.bxc3 Bxc3 10.Qb3 d5 (0)
          • C54o - 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 (not 9.d5) (0)
          • C54o - 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.bxc3 d5 10.Ba3 (0)
          • C54o - 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.d5 (not 9...Bf6) (0)
          • C54o - 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.d5 Bf6 10.Re1 Ne7 11.Rxe4 d6 12.Bg5 Bxg5 13.Nxg5 O-O 14.Nxh7 (2)
          • C54o - 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.d5 Bf6 10.Re1 Ne7 11.Rxe4 d6 12.g4 (0)
        • C54 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 - Italian Game: Classical Variation, Giuoco Pianissimo (430)
          • 5...a5 - Giuoco Pianissimo (5)
          • 5...h6 - Giuoco Pianissimo (4)
          • 5...O-O - Giuoco Pianissimo (2)
          • 6.c3 (1)
          • C54e - 5...a6 - 5.d3 a6 (87)
          • C54f - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 - Italian Game: Classical Variation, Giuoco Pianissimo (272)
            • 6.a4 - Giuoco Pianissimo (4)
            • 6.b4 (2)
            • 6.Bg5 - Giuoco Pianissimo (13)
            • C54 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O - Italian Game: Classical Variation, Giuoco Pianissimo (174)
              • 6...a5 (8)
              • C54 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. O-O d6 6. c3 a6 (15)
                • 7.Re1 (1)
                • C54 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. c3 a6 7. a4 - Italian Game: Classical Variation, Giuoco Pianissimo (5)
                  • 7...Ba7 (3)
                  • 7...O-O (1)
              • C54 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. O-O d6 6. c3 h6 (12)
                • 7.Nbd2 (1)
                • 7.Re1 (4)
              • C54i - 6...O-O - 5.d3 d6 6.O-O O-O (139)
          • C54g - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. Nbd2 - Italian Game: Classical Variation, Giuoco Pianissimo (61)
            • 6...a6 (1)
            • 6...O-O 7.O-O (1)
      • C54b - 5.O-O (0)
      • C54c - 5.b4 (not 5...Bb6) (0)
      • C54c - 5.b4 Bb6 6.a4 (22)
      • C54d - 3...Nf6 4.d3 Bc5 5.c3 - Giuoco Pianissimo (100)
      • C54h - 3...Bc5 4.O-O d6 5.c3 Nf6 6.d3 - 5.d3 d6 6.O-O (343)
      • C54j - 5.d4 (4)
      • C55a - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 - Italian Game (299)
        • 4.d3 Be7 (102)
          • C55e - 5.Bb3 O-O (11)
          • C55f - 5.c3 (1)
          • C55h - 5.O-O O-O (24)
          • C55j - 5.O-O O-O 6.Bb3 d6 7.c3 (10)
        • 4.d4 exd4 — Main Line (27)
          • C55l - 4...exd4 (not 5.Ng5, 5.Nxd4, 5.O-O) (0)
          • C55m - 5.Nxd4 (0)
          • C55n - 5.Ng5 (0)
          • C55p - 5.e5 d5 (9)
          • C55q - 5.e5 d5 6.Bb5 Ne4 7.Nxd4 Bd7 — Main Line (4)
          • C55r - 5.e5 d5 6.Bb5 Ne4 7.Nxd4 Bd7 8.Bxc6 bxc6 9.O-O Bc5 — Main Line (5)
          • C55s - 5.O-O (not 5...Bc5, 5...Be7, 5...d6) (0)
          • C55s - 5.O-O Be7 (0)
          • C55t - 5.O-O d6 (0)
          • C55u - 5.O-O Bc5 (0)
          • C55v - 5.O-O Bc5 6.e5 Ng4 (not 7.c3) (0)
          • C55v - 5.O-O Bc5 6.e5 Ng4 7.c3 (0)
          • C55w - 5.O-O Bc5 6.e5 d5 (not 7.exf6) (0)
          • C55w - 5.O-O Bc5 6.e5 d5 7.exf6 dxc4 8.Re1+ Be6 9.fxg7 (1)
        • 4.O-O Bc5 (3)
          • C55b - 5.d4 (not 5...Bxd4) (0)
          • C55b - 5.d4 Bxd4 6.Nxd4 Nxd4 7.Bg5 d6 8.f4 Qe7 9.fxe5 dxe5 10.Nc3 (3)
          • C55b - 5.d4 Bxd4 6.Nxd4 Nxd4 7.Bg5 h6 8.Bh4 g5 9.f4 (0)
      • C55c - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 - Italian Game: Two Knights Defense, Modern Bishop's Opening (83)
        • 4...a6 - Modern Bishop's Opening (2)
        • 4...d5 - Modern Bishop's Opening (6)
      • C55d - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 - Italian Game: Two Knights Defense, Modern Bishop's Opening (98)
        • 5.a3 - Modern Bishop's Opening (1)
        • 5.c3 - Modern Bishop's Opening (8)
        • 5.Nc3 - Modern Bishop's Opening (1)
        • 5.O-O - Modern Bishop's Opening (5)
      • C55e - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 - Italian Game: Two Knights Defense, Modern Bishop's Opening (51)
        • 5.Nbd2 - Modern Bishop's Opening (1)
        • C55 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. Nc3 - Italian Game: Two Knights Defense, Modern Bishop's Opening (11)
          • 5...d6 - Modern Bishop's Opening (10)
          • 5...O-O - Modern Bishop's Opening (1)
      • C55g - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O - Italian Game: Two Knights Defense, Modern Bishop's Opening (49)
        • 5...d6 6.a4 - Modern Bishop's Opening (1)
        • 5...O-O 6.a4 - Modern Bishop's Opening (5)
        • 5...O-O 6.h3 - Modern Bishop's Opening (1)
        • 5...O-O 6.Nbd2 - Modern Bishop's Opening (3)
        • 5...O-O 6.Nc3 - Modern Bishop's Opening (8)
      • C55i - 5...O-O 6.Bb3 - Modern Bishop's Opening (5)
      • C55k - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O O-O 6. Re1 - Italian Game: Two Knights Defense, Modern Bishop's Opening (62)
        • 6...d6 7.a3 - Modern Bishop's Opening (4)
        • 6...d6 7.c3 - Modern Bishop's Opening (1)
        • C55 - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O O-O 6. Re1 d6 7. a4 - Italian Game: Two Knights Defense, Modern Bishop's Opening (14)
          • 7...a5 - Modern Bishop's Opening (2)
          • 7...Be6 - Modern Bishop's Opening (7)
          • 7...Na5 - Modern Bishop's Opening (5)
      • C55l - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 - Italian Game: Two Knights Defense, Open Variation (7)
        • 4...d6 (1)
        • 4...exd4 5.e5 d5 6.Bb5 Ne4 (4)
        • 4...exd4 5.O-O Nxe4 (2)
          • C56a - 5...Nxe4 (not 6.Nc3, 6.Re1) (0)
          • C56a - 6.Nc3 (0)
          • C56b - 6.Re1 (not 6...d5) (0)
          • C56b - 6.Re1 d5 (not 7.Bxd5, 7.Nc3) (0)
          • C56c - 6.Re1 d5 7.Nc3 (0)
          • C56d - 6.Re1 d5 7.Bxd5 (not 7...Qxd5) (0)
          • C56d - 6.Re1 d5 7.Bxd5 Qxd5 (not 8.Nc3) (0)
          • C56d - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 (not 8...Qa5, 8...Qd8, 8...Qh5) (0)
          • C56e - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qd8 (0)
          • C56f - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qh5 (1)
          • C56g - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qh5 9.Nxe4 Be6 10.Bg5 Bd6 (0)
          • C56h - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 (not 9.Nxe4) (0)
          • C56h - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 (not 9...Be6) (0)
          • C56h - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 Be6 (not 10.Bd2, 10.Bg5, 10.Neg5) (0)
          • C56i - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 Be6 10.Bg5 (not 10...h6) (0)
          • C56i - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 Be6 10.Bg5 h6 11.Bh4 g5 12.Nf6+ Ke7 13.b4 (0)
          • C56j - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 Be6 10.Neg5 (0)
          • C56k - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 Be6 10.Neg5 O-O-O 11.Nxe6 fxe6 12.Rxe6 Bd6 (1)
          • C56l - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 Be6 10.Bd2 (not 10...Bb4, 10...Qd5, 10...Qf5) (0)
          • C56m - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 Be6 10.Bd2 Qf5 (0)
          • C56n - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 Be6 10.Bd2 Qd5 (0)
          • C56o - 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Nxe4 Be6 10.Bd2 Bb4 (0)
      • C57a - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 - Italian Game: Two Knights Defense, (6)
        • 4...Bc5 5.Bxf7+ Ke7 (1)
          • C57d - 6.Bb3 (1)
          • C57d - 6.Bd5 (0)
        • 4...Bc5 5.Nxf7 Bxf2+ (0)
          • C57b - 6.Kxf2 (0)
          • C57c - 6.Kf1 (not 6...Qe7) (0)
          • C57c - 6.Kf1 Qe7 7.Nxh8 d5 8.exd5 Bg4 (0)
          • C57c - 6.Kf1 Qe7 7.Nxh8 d5 8.exd5 Nd4 (not 9.d6, 9.h3) (0)
          • C57c - 6.Kf1 Qe7 7.Nxh8 d5 8.exd5 Nd4 9.d6 (0)
          • C57c - 6.Kf1 Qe7 7.Nxh8 d5 8.exd5 Nd4 9.h3 (0)
        • 4...d5 5.exd5 Nd4 — Main Line (1)
          • C57i - (not 6.c3) (0)
          • C57i - 6.c3 b5 7.Bf1 Nxd5 (not 8.Ne4, 8.Nxf7, 8.cxd4, 8.h4) (0)
          • C57j - 6.c3 b5 7.Bf1 Nxd5 8.cxd4 (0)
          • C57j - 6.c3 b5 7.Bf1 Nxd5 8.h4 (0)
          • C57j - 6.c3 b5 7.Bf1 Nxd5 8.Nxf7 (1)
          • C57k - 6.c3 b5 7.Bf1 Nxd5 8.Ne4 (0)
          • C57l - 6.c3 b5 7.Bf1 Nxd5 8.Ne4 Qh4 9.Ng3 Bb7 (0)
          • C57m - 6.c3 b5 7.Bf1 Nxd5 8.Ne4 Qh4 9.Ng3 Bg4 10.f3 e4 (0)
        • 4...d5 5.exd5 Nxd5 (2)
          • C57e - 5...Nxd5 (not 6.Nxf7, 6.d4) (0)
          • C57f - 6.d4 (not 6...Bb4+) (0)
          • C57f - 6.d4 Bb4+ (0)
          • C57g - 6.Nxf7 (not 6...Kxf7) (0)
          • C57g - 6.Nxf7 Kxf7 7.Qf3+ Ke6 8.Nc3 Nb4 9.Qe4 c6 10.a3 Na6 11.d4 Nc7 (2)
          • C57g - 6.Nxf7 Kxf7 7.Qf3+ Ke6 8.Nc3 Ne7 (0)
      • C57a - 4...Bc5 (not 5.Bxf7+, 5.Nxf7, 5.d4) (0)
      • C57a - 4...Bc5 5.d4 (0)
      • C57b - 4...Bc5 5.Nxf7 (not 5...Bxf2+) (0)
      • C57d - 4...Bc5 5.Bxf7+ (not 5...Ke7) (0)
      • C57e - 4...d5 (not 5.exd5) (0)
      • C57e - 4...d5 5.exd5 Nb4 (0)
      • C57h - 4...d5 5.exd5 b5 (0)
      • C58a - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 - Italian Game: Two Knights Defense, (53)
        • 6.Bb5+ c6 (32)
          • C58e - (not 7.dxc6) (30)
          • C58f - 7.dxc6 bxc6 8.Qf3 cxb5 (0)
          • C58f - 7.dxc6 bxc6 8.Qf3 Qc7 9.Bd3 (2)
          • C58g - 7.dxc6 bxc6 8.Qf3 Rb8 (0)
          • C58h - 7.dxc6 bxc6 8.Be2 (0)
        • 6.Bb5+ c6 7.dxc6 bxc6 8.Bd3 - Two Knights Defense, (11)
        • 6.d3 h6 (0)
          • C58c - 7.Nf3 e4 8.Qe2 (not 8...Nxc4) (0)
          • C58c - 7.Nf3 e4 8.Qe2 Nxc4 9.dxc4 Bc5 10.Nfd2 (0)
          • C58c - 7.Nf3 e4 8.Qe2 Nxc4 9.dxc4 Be7 (0)
      • C58b - 6.d3 (not 6...h6) (0)
      • C58d - 6.Bb5+ (not 6...Bd7) (0)
      • C58d - 6.Bb5+ Bd7 (6)
      • C58f - 6.Bb5+ c6 7.dxc6 bxc6 8.Qf3 - Bogoljubow Variation (4)
      • C59a - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 - Italian Game: Two Knights Defense, Polerio Defense, Suhle Defense (11)
        • 9.Nf3 e4 — Main Line (2)
          • C59c - 10.Ne5 (not 10...Bc5, 10...Bd6, 10...Qc7, 10...Qd4) (0)
          • C59c - 9...e4 (not 10.Ne5) (0)
          • C59d - 10.Ne5 Bc5 (0)
          • C59e - 10.Ne5 Qc7 (0)
          • C59f - 10.Ne5 Qd4 (0)
          • C59g - 10.Ne5 Bd6 (not 11.d4, 11.f4) (0)
          • C59h - 10.Ne5 Bd6 11.f4 (not 11...exf3) (0)
          • C59i - 10.Ne5 Bd6 11.f4 exf3 — Main Line (0)
          • C59j - 10.Ne5 Bd6 11.d4 (not 11...Qc7, 11...exd3) (0)
          • C59j - 10.Ne5 Bd6 11.d4 Qc7 (not 12.Bd2) (0)
          • C59j - 10.Ne5 Bd6 11.d4 Qc7 12.Bd2 — Main Line (1)
          • C59k - 10.Ne5 Bd6 11.d4 exd3 (not 12.Nxd3) — Main Line (0)
          • C59k - 10.Ne5 Bd6 11.d4 exd3 12.Nxd3 Qc7 (not 13.b3) (0)
          • C59l - 10.Ne5 Bd6 11.d4 exd3 12.Nxd3 Qc7 13.b3 — Main Line (1)
      • C59b - 9.Nh3 (8)
      • C59c - 9.Nf3 (not 9...e4) (0)
    • C50a - 3.Bc4 - Italian Game (2)
    • C55o - 3.d4 exd4 4.Bc4 Nf6 5.e5 - Modern Variation (9)
    • C60 - C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish opening) (2037)
      • 3...g6 4.d4 exd4 - Fianchetto Defense (1)
    • C60a - 3...d5 (not 4.c3, 4.O-O, 4.d4, 4.Nc3) (0)
    • C60b - 3...a5 (not 4.c3, 4.O-O, 4.d4, 4.Nc3) (0)
    • C60c - 3...f6 (not 4.c3, 4.O-O, 4.d4, 4.Nc3) (0)
    • C60d - 3...Na5 (not 4.c3, 4.O-O, 4.d4, 4.Nc3) (0)
    • C60e - 3...Be7 (not 4.c3, 4.O-O, 4.d4, 4.Nc3) (0)
    • C60f - 3...Qe7 (not 4.c3, 4.O-O, 4.d4, 4.Nc3) (0)
    • C60g - 3...g5 (not 4.c3, 4.O-O, 4.d4, 4.Nc3) (0)
    • C60h - 3...Bb4 (not 4.c3) (0)
    • C60i - 4.c3 (1)
    • C60j - 3...g6 (not 4.O-O, 4.d4) (31)
    • C60k - 4.O-O (10)
    • C60l - 4.d4 (not 4...exd4) (4)
    • C60m - 4.d4 exd4 5.Bg5 (10)
    • C60o - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 - Ruy Lopez: Cozio Defense (113)
      • 4.O-O g6 (13)
        • C60t - 4...g6 (not 5.c3) (1)
        • C60u - 5.c3 (12)
    • C60p - 3...Nge7 4.Nc3 (not 4...g6) (15)
    • C60q - 4.Nc3 g6 (3)
    • C60s - 4.O-O (not 4...g6) (11)
    • C61a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 - Ruy Lopez (12)
      • 4.Nxd4 exd4 (12)
        • C61c - 4...exd4 (not 5.Bc4, 5.O-O, 5.d3) (0)
        • C61d - 5.d3 (1)
        • C61e - 5.Bc4 (3)
        • C61f - 5.O-O (not 5...Bc5, 5...Ne7, 5...c6) (0)
        • C61f - 5.O-O Ne7 (1)
        • C61g - 5.O-O c6 (not 6.Bc4) (0)
        • C61h - 5.O-O c6 6.Bc4 (1)
        • C61i - 5.O-O Bc5 (not 6.d3) (1)
        • C61j - 5.O-O Bc5 6.d3 (not 6...c6) (0)
        • C61k - 5.O-O Bc5 6.d3 c6 (not 7.Bc4) (4)
        • C61l - 5.O-O Bc5 6.d3 c6 7.Bc4 (not 7...d5) (0)
        • C61m - 5.O-O Bc5 6.d3 c6 7.Bc4 d5 (1)
    • C61b - 4.Bc4 (0)
    • C61c - 4.Nxd4 (not 4...exd4) (0)
    • C62 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 - Ruy Lopez: Steinitz Defense (6)
    • C63a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 - Ruy Lopez (69)
      • 4.d3 fxe4 (36)
        • C63e - (not 5.dxe4) (9)
        • C63f - 5.dxe4 Nf6 6.O-O (27)
      • 4.Nc3 fxe4 (25)
        • C63n - (not 5.Nxe4) (0)
        • C63o - 5.Nxe4 Nf6 (not 6.Nxf6+, 6.Qe2) (1)
        • C63p - 5.Nxe4 Nf6 6.Qe2 (10)
        • C63q - 5.Nxe4 Nf6 6.Nxf6+ (9)
        • C63r - 5.Nxe4 d5 (not 6.Nxe5) (0)
        • C63s - 5.Nxe4 d5 6.Nxe5 (0)
        • C63t - 5.Nxe4 d5 6.Nxe5 dxe4 7.Nxc6 Qd5 (2)
        • C63u - 5.Nxe4 d5 6.Nxe5 dxe4 7.Nxc6 Qg5 (3)
      • 4.Nc3 Nd4 (1)
        • C63j - 4...Nd4 (not 5.Ba4) (0)
        • C63k - 5.Ba4 (1)
      • 4.Nc3 Nf6 (1)
        • C63l - 4...Nf6 (not 5.exf5) (0)
        • C63m - 5.exf5 (1)
    • C63a - 4.Qe2 (0)
    • C63b - 4.exf5 (0)
    • C63c - 4.d4 (2)
    • C63d - 4.d3 (not 4...fxe4) (3)
    • C63g - 4.Bxc6 (not 4...dxc6) (0)
    • C63h - 4.Bxc6 dxc6 (1)
    • C63i - 4.Nc3 (not 4...Nd4, 4...Nf6, 4...fxe4) (0)
    • C64a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 - Ruy Lopez: Classical Variation (27)
      • 4.c3 f5 (1)
        • C64f - 4...f5 (not 5.d4) (0)
        • C64g - 5.d4 (1)
      • 4.c3 Nf6 (9)
        • C64h - 4...Nf6 (not 5.d4) (3)
        • C64i - 5.d4 (not 5...Bb6) (3)
        • C64j - 5.d4 Bb6 (3)
      • 4.O-O d6 (1)
        • C64n - 4...d6 (not 5.c3) (0)
        • C64o - 5.c3 (1)
      • 4.O-O Nd4 (8)
        • C64p - 4...Nd4 (not 5.Bc4, 5.Nxd4, 5.b4) (0)
        • C64q - 5.b4 (0)
        • C64r - 5.Bc4 (0)
        • C64s - 5.Nxd4 (not 5...Bxd4) (0)
        • C64s - 5.Nxd4 Bxd4 (not 6.c3) (0)
        • C64s - 5.Nxd4 Bxd4 6.c3 (not 6...Bb6) (0)
        • C64s - 5.Nxd4 Bxd4 6.c3 Bb6 (not 7.d4) (1)
        • C64t - 5.Nxd4 Bxd4 6.c3 Bb6 7.d4 (3)
        • C64u - 5.Nxd4 Bxd4 6.c3 Bb6 7.d4 c6 8.Ba4 (1)
        • C64v - 5.Nxd4 Bxd4 6.c3 Bb6 7.d4 c6 8.Ba4 d6 9.Na3 (3)
    • C64a - 4.Bxc6 (1)
    • C64b - 4.c3 (not 4...Bb6, 4...Nge7, 4...Qe7, 4...Qf6) (0)
    • C64b - 4.c3 Qe7 (0)
    • C64c - 4.c3 Bb6 (0)
    • C64d - 4.c3 Nge7 (0)
    • C64e - 4.c3 Qf6 (0)
    • C64k - 4.O-O (not 4...Nge7, 4...Qf6) (0)
    • C64l - 4.O-O Nge7 (0)
    • C64m - 4.O-O Qf6 (0)
    • C65a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 - Ruy Lopez (809)
      • 4.d3 Bc5 (596)
        • C65j - 5.Be3 (596)
      • 4.d3 d6 (78)
        • C65h - 5.Bxc6+ (59)
        • C65h - 5.c4 (0)
        • C65i - 5.c3 (19)
      • 4.d3 Ne7 (6)
        • C65g - 5.Nxe5 c6 (6)
      • 4.d4 exd4 (10)
        • C65d - 4...exd4 (not 5.O-O) (6)
        • C65e - 5.O-O (4)
      • 4.O-O Bc5 (43)
        • C65m - 4...Bc5 (not 5.Nxe5, 5.c3) (7)
        • C65n - 5.c3 (1)
        • C65p - 5.c3 O-O 6.d4 Bb6 7.Bg5 (9)
        • C65q - 5.Nxe5 (11)
    • C65b - 4.Qe2 (15)
    • C65c - 4.d4 (not 4...exd4) (1)
    • C65f - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 - Ruy Lopez: Berlin Defense (52)
    • C65g - 4...Ne7 - Mortimer Variation (2)
    • C65h - 4...d6 (8)
    • C65j - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 - Ruy Lopez (38)
      • 5.Ba4 (2)
      • 5.c3 (10)
      • 5.Nbd2 (2)
      • 5.O-O (7)
      • C65 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Bxc6 - Ruy Lopez (17)
        • C65 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Bxc6 dxc6 - Ruy Lopez (17)
          • 6.Be3 (1)
          • 6.c3 - Berlin Defense (1)
          • 6.h3 (1)
          • 6.Nbd2 (5)
          • 6.O-O (8)
          • 6.Qe2 (1)
    • C65k - 4.O-O (not 4...Be7) (0)
    • C65l - 4.O-O Be7 (6)
    • C65o - 3...Nf6 4.O-O Bc5 5.c3 O-O 6.d4 Bb6 - Benelux Variation (16)
    • C66 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. Nc3 Nf6 6. O-O Be7 7. Re1 O-O - Ruy Lopez: Berlin Defense, Tarrasch Trap (1)
    • C67a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 - Ruy Lopez: Berlin Defense, Rio Gambit Accepted (838)
      • 5.d4 Be7 — Pillsbury (21)
        • C67f - 5...Be7 (not 6.Qe2, 6.dxe5) (1)
        • C67g - 6.dxe5 (4)
        • C67h - 6.Qe2 (not 6...Nd6, 6...d5) (0)
        • C67h - 6.Qe2 d5 (0)
        • C67i - 6.Qe2 Nd6 (not 7.Bxc6) (0)
        • C67i - 6.Qe2 Nd6 7.Bxc6 bxc6 8.dxe5 Nf5 (4)
        • C67j - 6.Qe2 Nd6 7.Bxc6 bxc6 8.dxe5 Nb7 (not 9.Nc3, 9.Nd4, 9.b3, 9.c4) (0)
        • C67j - 6.Qe2 Nd6 7.Bxc6 bxc6 8.dxe5 Nb7 9.b3 (2)
        • C67j - 6.Qe2 Nd6 7.Bxc6 bxc6 8.dxe5 Nb7 9.c4 (0)
        • C67k - 6.Qe2 Nd6 7.Bxc6 bxc6 8.dxe5 Nb7 9.Nd4 (2)
        • C67l - 6.Qe2 Nd6 7.Bxc6 bxc6 8.dxe5 Nb7 9.Nc3 — Main Line (8)
      • 5.d4 Nd6 (442)
        • C67p - 6.Bxc6 dxc6 (1)
        • C67q - 7.dxe5 Nf5 (not 8.Qxd8+) (1)
        • C67r - 6.Bxc6 dxc6 7.dxe5 Nf5 8.Qxd8+ (93)
        • C67t - 6.Bxc6 dxc6 7.dxe5 Nf5 8.Qxd8+ Kxd8 9.Nc3 h6 (31)
        • C67u - 7.dxe5 Nf5 8.Qxd8+ Kxd8 9.Nc3 Ke8 (not 10.Rd1, 10.h3) (17)
        • C67v - 6.Bxc6 dxc6 7.dxe5 Nf5 8.Qxd8+ Kxd8 9.Nc3 Ke8 10.Rd1 (30)
        • C67w - 6.Bxc6 dxc6 7.dxe5 Nf5 8.Qxd8+ Kxd8 9.Nc3 Ke8 10.h3 (142)
      • C67 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 - Ruy Lopez: Berlin Defense, Rio Gambit Accepted (336)
        • 6.a4 - Rio Gambit Accepted (6)
        • 6.Bf1 - Rio Gambit Accepted (1)
        • C67d - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 - Ruy Lopez: Berlin Defense, Rio Gambit Accepted (329)
          • 6...Be7 7.Bf1 Nf5 - Rio Gambit Accepted (3)
          • C67 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 - Ruy Lopez: Berlin Defense, Rio Gambit Accepted (13)
            • 8.Rxe5 O-O 9.d4 - Rio Gambit Accepted (9)
            • 8.Rxe5 O-O 9.Nc3 - Rio Gambit Accepted (4)
    • C67b - 5.Qe2 (6)
    • C67c - 5.Re1 (not 5...Nd6) (11)
    • C67e - 5.d4 (not 5...a6) (0)
    • C67e - 5.d4 a6 (1)
    • C67m - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 - Ruy Lopez: Berlin Defense, l'Hermet Variation (20)
    • C67m - 6.Ba4 - Showalter Variation (16)
    • C67n - 6.dxe5 - 5.d4 Nd6 6.dxe5 (20)
    • C67o - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 - Ruy Lopez: Berlin Defense, Rio Gambit Accepted (16)
      • 6...dxc6 7.dxe5 Nf5 8.Qxd8+ Kxd8 9.h3 - Rio Gambit Accepted (6)
    • C67s - 6...dxc6 7.dxe5 Nf5 8.Qxd8+ Kxd8 9.Nc3 - Rio Gambit Accepted (105)
    • C68b - 4.Bc4 (not 4...bxc6, 4...dxc6, 5.Nc3, 5.O-O) (0)
    • C68c - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 - Ruy Lopez: Exchange Variation (110)
      • 4...dxc6 5.Nc3 f6 — Exchange (5)
        • C68h - 5...f6 (not 6.d3, 6.d4) (0)
        • C68h - 6.d3 (0)
        • C68i - 6.d4 (5)
      • 4...dxc6 5.O-O Bd6 — Exchange (12)
        • C68l - (not 6.d4) (1)
        • C68m - 6.d4 exd4 (11)
      • 4...dxc6 5.O-O Bg4 — Exchange (24)
        • C68n - 5...Bg4 (not 6.h3) (0)
        • C68n - 6.h3 (not 6...h5) (3)
        • C68o - 6.h3 h5 (9)
        • C68p - 6.h3 h5 7.d3 Qf6 8.Nbd2 (12)
      • 4...dxc6 5.O-O Qd6 — Exchange (26)
        • C68q - 5...Qd6 (not 6.Na3, 6.d3) (5)
        • C68r - 6.d3 (5)
        • C68s - 6.Na3 (not 6...Be6, 6...b5) (0)
        • C68t - 6.Na3 b5 (9)
        • C68u - 6.Na3 Be6 (7)
    • C68c - 4...bxc6 (0)
    • C68d - 4.Bxc6 dxc6 (not 5.Nc3, 5.d4) (2)
    • C68e - 4...dxc6 5.d4 (not 5...exd4) (1)
    • C68f - 4...dxc6 5.d4 exd4 6.Qxd4 Qxd4 7.Nxd4 Bd7 (4)
    • C68g - 4...dxc6 5.Nc3 (not 5...f6) (2)
    • C68j - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O - Ruy Lopez: Exchange Variation, Normal Variation (78)
      • 5...f6 6.d4 Bg4 — Exchange (24)
        • C69b - 6...Bg4 (not 7.c3, 7.dxe5) (0)
        • C69c - 7.c3 (not 7...Bd6) (0)
        • C69d - 7.c3 Bd6 (9)
        • C69e - 7.dxe5 (2)
        • C69f - 7.dxe5 Qxd1 8.Rxd1 fxe5 9.Rd3 (not 9...Bd6) (1)
        • C69g - 7.dxe5 Qxd1 8.Rxd1 fxe5 9.Rd3 Bd6 (12)
      • 5...f6 6.d4 exd4 — Exchange (23)
        • C69h - 6...exd4 (not 7.Nxd4, 7.Qxd4) (0)
        • C69h - 7.Nxd4 (not 7...Ne7, 7...c5) (0)
        • C69i - 7.Nxd4 Ne7 (1)
        • C69i - 7.Qxd4 (0)
        • C69j - 7.Nxd4 c5 (not 8.Nb3, 8.Ne2) (0)
        • C69j - 7.Nxd4 c5 8.Ne2 (13)
        • C69k - 7.Nxd4 c5 8.Nb3 (not 8...Qxd1) (0)
        • C69k - 7.Nxd4 c5 8.Nb3 Qxd1 9.Rxd1 (not 9...Bd7, 9...Bg4) (3)
        • C69l - 7.Nxd4 c5 8.Nb3 Qxd1 9.Rxd1 Bd7 (2)
        • C69m - 7.Nxd4 c5 8.Nb3 Qxd1 9.Rxd1 Bg4 (4)
        • C69n - 7.Nxd4 c5 8.Nb3 Qxd1 9.Rxd1 Bg4 10.f3 Be6 (0)
    • C68k - 4...dxc6 5.O-O Ne7 (7)
    • C69a - 5...f6 (not 6.d4) (0)
    • C69b - 5...f6 6.d4 (not 6...Bg4, 6...exd4) (0)
    • C70-C79 Ruy Lopez1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 ..... (927)
      • C70 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 - Ruy Lopez: Morphy Defense (109)
        • C70 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5 - Ruy Lopez: Morphy Defense, Norwegian Variation (1)
        • C70 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5 - Ruy Lopez: Morphy Defense, Classical Defense Deferred (8)
        • C70 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 f5 - Ruy Lopez: Morphy Defense, Schliemann Defense Deferred (1)
        • C70 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 g6 (1)
        • C70 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nge7 - Ruy Lopez: Morphy Defense, Cozio Defense (10)
      • C71 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 - Ruy Lopez: Morphy Defense, Modern Steinitz Defense (7)
      • C72 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O - Ruy Lopez: Morphy Defense, Modern Steinitz Defense (45)
      • C73 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 - Ruy Lopez: Morphy Defense, Modern Steinitz Defense (16)
      • C74 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 - Ruy Lopez: Morphy Defense, Modern Steinitz Defense (11)
      • C75 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 - Ruy Lopez: Morphy Defense, Modern Steinitz Defense (25)
      • C76 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. c3 a6 5. Ba4 d6 6. d4 Bd7 - Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Fianchetto Variation (73)
      • C77a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 - Ruy Lopez (247)
      • C77b - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 - Ruy Lopez: Morphy Defense, Anderssen Variation (235)
        • 5...b5 6.Bb3 Bc5 (10)
          • C77s - 6...Bc5 (not 7.c3) (3)
          • C77t - 7.c3 (7)
        • 5...b5 6.Bb3 Be7 (6)
          • C77u - (not 7.d4) (0)
          • C77u - 7.d4 d6 8.c3 Bg4 (6)
        • 5...Bc5 - Anderssen Variation (9)
      • C77c - 5...b5 (68)
      • C77d - 5.d3 d6 (not 6.c3, 6.c4) (8)
      • C77e - 5...d6 6.c4 (4)
      • C77f - 5.d3 d6 6.c3 (not 6...g6) (14)
      • C77g - 5...d6 6.c3 g6 (33)
      • C77h - 5.Nc3 - Four Knights (Tarrasch) Variation (49)
      • C77i - 5.Bxc6 (not 5...b5, 5...d6, 5...Nxd4, 5...Nxe4, 5...Be7, 5...exd4, 6.Bb3) (2)
      • C77j - 5.d4 - Centre Attack (2)
      • C77l - 5...Nxd4 (2)
      • C77m - 5...Nxe4 (1)
      • C77n - 5...Be7 (0)
      • C77o - 5...exd4 (0)
      • C77p - 5.Qe2 - Wormald Attack (9)
      • C77r - 5...b5 (not 6.Bb3) (1)
      • C78a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O - Ruy Lopez: Morphy Defense (363)
        • 5...b5 6.Bb3 Bb7 — Main Line (54)
          • C78n - 6...Bb7 (not 7.Re1, 7.c3, 7.d3, 7.d4) (2)
          • C78o - 7.d4 (0)
          • C78p - 7.d3 (not 7...Be7) (12)
          • C78q - 7.d3 Be7 (23)
          • C78r - 7.c3 (not 7...Nxe4) (0)
          • C78s - 7.c3 Nxe4 (7)
          • C78t - 7.Re1 (not 7...Bc5) (0)
          • C78t - 7.Re1 Bc5 (2)
          • C78u - 7.Re1 Bc5 8.c3 d6 (not 9.d4) (0)
          • C78u - 7.Re1 Bc5 8.c3 d6 9.d4 Bb6 (not 10.Bg5, 10.a4) (4)
          • C78v - 7.Re1 Bc5 8.c3 d6 9.d4 Bb6 10.a4 — Main Line (4)
          • C78w - 7.Re1 Bc5 8.c3 d6 9.d4 Bb6 10.Bg5 — Main Line (0)
        • 5...b5 6.Bb3 Bc5 (215)
          • C78h - 6...Bc5 (not 7.Nxe5, 7.a4, 7.c3) (17)
          • C78i - 7.Nxe5 (not 7...Nxe5) (0)
          • C78i - 7.Nxe5 Nxe5 8.d4 (3)
          • C78j - 7.c3 (not 7...d6) (0)
          • C78j - 7.c3 d6 (not 8.d4) (57)
          • C78k - 7.c3 d6 8.d4 (45)
          • C78l - 7.a4 (not 7...Rb8) (12)
          • C78m - 7.a4 Rb8 (81)
        • 5...b5 6.Bb3 Be7 (4)
          • C78g - 6...Be7 (not 7.d4) (0)
          • C78g - 7.d4 (4)
        • 5...b5 6.Bb3 d6 (0)
          • C78f - (not 7.Ng5) (0)
          • C78f - 7.Ng5 d5 8.exd5 Nd4 9.Re1 Bc5 10.Rxe5+ Kf8 (0)
      • C78b - 5...Bc5 (not 6.Nxe5) (14)
      • C78c - 5...Bc5 6.Nxe5 (1)
      • C78d - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 6. c3 - Ruy Lopez: Morphy Defense (61)
        • 6...b5 - Morphy Defense (10)
        • 6...O-O - Morphy Defense (5)
      • C78e - 5...b5 (not 6.Bb3) (0)
      • C78e - 5...b5 6.Bb3 - Morphy Defense (13)
      • C79 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 - Ruy Lopez: Morphy Defense, Steinitz Deferred (31)
    • C80-C89 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 & C84-C89 C84 5. O-O Be7 Ruy Lopez, closed defence (1440)
      • C80a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 - Ruy Lopez: Open (81)
        • 6.d4 b5 (52)
          • C80i - 6...b5 (not 7.Bb3, 7.Nxe5, 7.d5) (0)
          • C80i - 7.d5 (0)
          • C80i - 7.Nxe5 (0)
          • C80j - 7.Bb3 (not 7...d5) (3)
          • C80k - 7.Bb3 d5 (not 8.Nxe5, 8.a4, 8.c4, 8.dxe5) (0)
          • C80k - 7.Bb3 d5 8.a4 (not 8...Nxd4) (0)
          • C80k - 7.Bb3 d5 8.a4 Nxd4 (not 9.Nxd4) (0)
          • C80k - 7.Bb3 d5 8.a4 Nxd4 9.Nxd4 exd4 10.Nc3 (1)
          • C80k - 7.Bb3 d5 8.c4 (0)
          • C80l - 7.Bb3 d5 8.Nxe5 (3)
          • C80m - 7.Bb3 d5 8.dxe5 (not 8...Ne7) (0)
          • C80m - 7.Bb3 d5 8.dxe5 Ne7 (0)
          • C80n - 7.Bb3 d5 8.dxe5 Be6 9.a4 (3)
          • C80q - 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 Bc5 (1)
          • C80r - 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 Nc5 (1)
          • C80s - 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 Nc5 10.c3 d4 (not 11.Bxe6, 11.Ng5, 11.cxd4) (0)
          • C80s - 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 Nc5 10.c3 d4 11.cxd4 (0)
          • C80t - 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 Nc5 10.c3 d4 11.Ng5 (7)
          • C80u - 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 Nc5 10.c3 d4 11.Bxe6 (20)
      • C80b - 6.Nc3 (0)
      • C80c - 6.Qe2 (0)
      • C80d - 6.Re1 - Open (3)
      • C80e - 6.Re1 Nc5 7.Bxc6 (2)
      • C80f - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 - Ruy Lopez: Open (10)
      • C80g - 6.d4 exd4 (0)
      • C80h - 6...Be7 - Open (18)
      • C80n - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 - Ruy Lopez: Open, Main Line (5)
      • C80o - 9.Be3 - Main Line (11)
      • C80p - 9.Nbd2 - Bernstein Variation (7)
      • C81 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 - Ruy Lopez: Open, Howell Attack (21)
      • C82a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 - Ruy Lopez: Open (64)
        • 9...Bc5 10.Nbd2 O-O (26)
          • C82k - 10...O-O (not 11.Bc2) (2)
          • C82l - 11.Bc2 (not 11...Bf5, 11...f5) (0)
          • C82m - 11.Bc2 f5 (0)
          • C82n - 11.Bc2 Bf5 (not 12.Nb3) (0)
          • C82n - 11.Bc2 Bf5 12.Nb3 (13)
          • C82o - 11.Bc2 Nxf2 12.Rxf2 f6 13.exf6 (7)
          • C82p - 11.Bc2 Nxf2 12.Rxf2 f6 13.exf6 Bxf2+ 14.Kxf2 (0)
          • C82q - 11.Bc2 Nxf2 12.Rxf2 f6 13.exf6 Bxf2+ 14.Kxf2 Qxf6 15.Nf1 (3)
          • C82r - 11.Bc2 Nxf2 12.Rxf2 f6 13.exf6 Bxf2+ 14.Kxf2 Qxf6 15.Kg1 (not 15...g5) (1)
          • C82s - 11.Bc2 Nxf2 12.Rxf2 f6 13.exf6 Bxf2+ 14.Kxf2 Qxf6 15.Kg1 g5 (0)
        • 9...Nc5 10.Bc2 Bg4 (21)
          • C82c - 10...Bg4 (not 11.Nbd2, 11.Re1) (0)
          • C82d - 11.Re1 (0)
          • C82e - 11.Nbd2 (not 11...Be7) (0)
          • C82e - 11.Nbd2 Be7 (not 12.Re1) (6)
          • C82f - 11.Nbd2 Be7 12.Re1 (not 12...O-O, 12...Qd7) (3)
          • C82g - 11.Nbd2 Be7 12.Re1 Qd7 (7)
          • C82h - 11.Nbd2 Be7 12.Re1 O-O (5)
      • C82b - 9...Nc5 (not 10.Bc2) (0)
      • C82b - 9...Nc5 10.Bc2 (not 10...Bg4) (0)
      • C82i - 9...Bc5 (not 10.Nbd2, 10.Qd3) (3)
      • C82j - 9...Bc5 10.Qd3 (not 10...Ne7) (0)
      • C82j - 9...Bc5 10.Qd3 Ne7 (10)
      • C82k - 9...Bc5 10.Nbd2 (not 10...O-O) (0)
      • C82o - 9...Bc5 10.Nbd2 O-O 11.Bc2 Nxf2 - Dilworth Variation (4)
      • C83 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 - Ruy Lopez: Open, Classical Defense (129)
      • C84a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 - Ruy Lopez: Closed (362)
        • 6.d3 b5 (244)
          • C84f - 6...b5 (not 7.Bb3) (0)
          • C84f - 7.Bb3 (244)
        • 6.d3 b5 7.Bb3 d6 8.a3 - Closed (8)
        • 6.d3 b5 7.Bb3 d6 8.a4 - Closed (8)
        • 6.d3 b5 7.Bb3 d6 8.Bd2 - Closed (1)
        • 6.d3 b5 7.Bb3 d6 8.c3 - Closed (5)
        • 6.d3 b5 7.Bb3 O-O 8.a4 - Closed (2)
        • 6.d3 b5 7.Bb3 O-O 8.Nc3 - Closed (2)
        • 6.d3 d6 7.c3 O-O 8.h3 - Closed (2)
        • 6.d3 d6 7.c3 O-O 8.Re1 - Closed (3)
        • 6.d4 exd4 (13)
          • C84g - 6...exd4 (not 7.Re1, 7.e5) (0)
          • C84h - 7.e5 (not 7...Ne4) (0)
          • C84h - 7.e5 Ne4 (not 8.Nxd4, 8.b4) (0)
          • C84h - 7.e5 Ne4 8.b4 (0)
          • C84h - 7.e5 Ne4 8.c3 dxc3 (2)
          • C84i - 7.e5 Ne4 8.Nxd4 (not 8...Nxd4, 8...O-O) (0)
          • C84j - 7.e5 Ne4 8.Nxd4 Nxd4 (3)
          • C84k - 7.e5 Ne4 8.Nxd4 O-O (4)
          • C84l - 7.Re1 (not 7...O-O, 7...b5) (0)
          • C84m - 7.Re1 b5 (not 8.e5) (1)
          • C84n - 7.Re1 b5 8.e5 (not 8...Nxe5) (0)
          • C84n - 7.Re1 b5 8.e5 Nxe5 (not 9.Rxe5) (0)
          • C84n - 7.Re1 b5 8.e5 Nxe5 9.Rxe5 (0)
          • C84o - 7.Re1 O-O (0)
          • C84p - 7.Re1 O-O 8.e5 Ne8 (not 9.Bf4, 9.c3) (0)
          • C84p - 7.Re1 O-O 8.e5 Ne8 9.c3 (3)
          • C84q - 7.Re1 O-O 8.e5 Ne8 9.Bf4 (0)
        • 6.Nc3 b5 (10)
          • C84c - 6...b5 (not 7.Bb3) (0)
          • C84c - 7.Bb3 (not 7...d6) (0)
          • C84c - 7.Bb3 d6 (not 8.Nd5) (9)
          • C84d - 7.Bb3 d6 8.Nd5 (1)
      • C84b - 6.Nc3 (not 6...b5) (1)
      • C84e - 6.d3 (not 6...b5) (63)
      • C84g - 6.d4 (not 6...exd4) (0)
      • C84h - 8.c3 - Basque Gambit (1)
      • C85a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 - Ruy Lopez: Closed, Delayed Exchange (58)
        • 6...dxc6 7.d3 Nd7 — Exchange (24)
          • C85l - 7...Nd7 (not 8.Nbd2) (11)
          • C85m - 8.Nbd2 (5)
          • C85n - 8.Nbd2 O-O 9.Nc4 (not 9...f6) (1)
          • C85o - 8.Nbd2 O-O 9.Nc4 f6 (not 10.Nh4) (0)
          • C85p - 8.Nbd2 O-O 9.Nc4 f6 10.Nh4 (not 10...Nc5) (3)
          • C85q - 8.Nbd2 O-O 9.Nc4 f6 10.Nh4 Nc5 (not 11.Nf5) (1)
          • C85r - 8.Nbd2 O-O 9.Nc4 f6 10.Nh4 Nc5 11.Nf5 (3)
        • 6...dxc6 7.Qe1 Nd7 — Exchange (3)
          • C85h - 7...Nd7 (not 8.b3) (2)
          • C85i - 8.b3 (1)
        • 6...dxc6 7.Re1 - Delayed Exchange (7)
      • C85b - 6...dxc6 (not 7.Nc3, 7.Qe1, 7.Qe2, 7.d3) (2)
      • C85c - 6...dxc6 7.Qe2 (1)
      • C85d - 7.Nc3 (not 7...Bg4) (6)
      • C85e - 6...dxc6 7.Nc3 Bg4 (0)
      • C85f - 7.Qe1 (not 7...c5) (0)
      • C85g - 6...dxc6 7.Qe1 c5 (1)
      • C85j - 7.d3 (not 7...Bg4) (14)
      • C85k - 6...dxc6 7.d3 Bg4 (0)
      • C86a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 - Ruy Lopez: Closed, Worrall Attack (30)
        • 6...b5 7.Bb3 d6 (4)
          • C86c - 7...d6 (not 8.c3) (0)
          • C86d - 8.c3 (4)
        • 6...b5 7.Bb3 O-O (23)
          • C86e - 7...O-O (not 8.a4, 8.c3) (0)
          • C86e - 8.a4 (2)
          • C86f - 8.c3 (not 8...d5, 8...d6) (1)
          • C86g - 8.c3 d6 (not 9.Rd1, 9.d4) (0)
          • C86h - 8.c3 d6 9.d4 (7)
          • C86i - 8.c3 d6 9.Rd1 (2)
          • C86j - 8.c3 d5 (not 9.d3, 9.exd5) (0)
          • C86j - 8.c3 d5 9.exd5 (0)
          • C86k - 8.c3 d5 9.d3 (not 9...Bb7) (4)
          • C86l - 8.c3 d5 9.d3 Bb7 (7)
      • C86a - 6...d6 (2)
      • C86b - 6...b5 (not 7.Bb3) (0)
      • C86b - 6...b5 7.Bb3 (not 7...O-O, 7...d6) (1)
      • C87b - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 d6 - Ruy Lopez: Closed, Averbakh Variation (39)
        • 7.Bxc6+ bxc6 (7)
          • C87c - 8.d4 (not 8...exd4) (1)
          • C87d - 8...exd4 (not 9.Nxd4) (0)
          • C87d - 8.d4 exd4 9.Nxd4 (6)
        • 7.c3 Bg4 (25)
          • C87f - 7...Bg4 (not 8.d3, 8.h3) (0)
          • C87g - 8.h3 (8)
          • C87h - 8.d3 (17)
        • 7.c3 O-O (7)
          • C87i - 7...O-O (not 8.d4, 8.h3) (0)
          • C87j - 8.d4 (not 8...Bd7) (1)
          • C87k - 8.d4 Bd7 (not 9.Nbd2) (0)
          • C87l - 8.d4 Bd7 9.Nbd2 (not 9...Re8) (2)
          • C87m - 8.d4 Bd7 9.Nbd2 Re8 (0)
          • C87n - 8.h3 (not 8...Bd7) (2)
          • C87o - 8.h3 Bd7 (2)
      • C87c - 7.Bxc6+ (not 7...bxc6) (0)
      • C87e - 7.c3 (not 7...Bg4, 7...O-O) (0)
      • C88a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 - Ruy Lopez: Closed (484)
        • 7...d6 8.c3 Na5 (5)
          • C88e - (not 9.Bc2) (0)
          • C88e - 9.Bc2 c5 10.d4 Qc7 11.a4 (0)
          • C88e - 9.Bc2 c5 10.d4 Qc7 11.h3 Nc6 12.d5 Nb8 13.Nbd2 g5 (5)
        • 7...O-O 8.a4 Bb7 (83)
          • C88m - 9.d3 (not 9...d6) (16)
          • C88n - 9...d6 (not 10.Nc3, 10.c3) (46)
          • C88o - 9.d3 d6 10.Nc3 (15)
          • C88p - 9.d3 d6 10.c3 (6)
      • C88b - 7...Bb7 (3)
      • C88c - 7...d6 (not 8.c3, 8.d4) (1)
      • C88c - 7...d6 8.d4 (not 8...Nxd4) (0)
      • C88c - 7...d6 8.d4 Nxd4 9.Nxd4 exd4 10.Qxd4 c5 (15)
      • C88d - 7...d6 8.c3 (not 8...Bg4) (0)
      • C88d - 7...d6 8.c3 Bg4 (3)
      • C88f - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O - Ruy Lopez: Closed (39)
      • C88g - 7...O-O 8.d3 (not 8...d6) (0)
      • C88g - 7...O-O 8.d3 d6 (15)
      • C88h - 8.h3 - Closed (73)
      • C88i - 7...O-O 8.h3 Bb7 9.d3 d6 (102)
      • C88j - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 - Ruy Lopez: Closed (27)
        • 8...Rb8 - Closed (2)
      • C88k - 8...b4 - Closed (144)
      • C88l - 8...Bb7 - Closed (3)
      • C88q - 7...O-O 8.c3 (3)
      • C89a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 - Ruy Lopez: Marshall Attack (171)
        • 9.exd5 Nxd5 — Main Line (159)
          • C89c - 9...Nxd5 (not 10.Nxe5) (3)
          • C89d - 10.Nxe5 (not 10...Nxe5) (0)
          • C89d - 10.Nxe5 Nxe5 (not 11.Rxe5) (0)
          • C89d - 10.Nxe5 Nxe5 11.Rxe5 (not 11...Nf6, 11...c6) (5)
          • C89e - 10.Nxe5 Nxe5 11.Rxe5 Nf6 (0)
          • C89f - 10.Nxe5 Nxe5 11.Rxe5 c6 (not 12.Bxd5, 12.d3, 12.d4) (6)
          • C89g - 10.Nxe5 Nxe5 11.Rxe5 c6 12.Bxd5 (0)
          • C89h - 10.Nxe5 Nxe5 11.Rxe5 c6 12.Bxd5 cxd5 13.d4 Bd6 14.Re3 (2)
          • C89i - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d3 (not 12...Bd6) (0)
          • C89i - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d3 Bd6 13.Re1 (not 13...Qh4) (63)
          • C89j - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d3 Bd6 13.Re1 Qh4 (20)
          • C89k - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 (not 12...Bd6) (0)
          • C89k - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 (not 13.Re1, 13.Re2) (0)
          • C89l - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re2 — Main Line (6)
          • C89m - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 (not 13...Qh4) (0)
          • C89m - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 (not 14.g3) (0)
          • C89m - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 (not 14...Qh3) (0)
          • C89n - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 (not 15.Be3, 15.Re4) (11)
          • C89o - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Re4 — Main Line (16)
          • C89p - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 (not 15...Bg4) (0)
          • C89p - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 (not 16.Qd3) (0)
          • C89p - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 (not 16...Rae8) (4)
          • C89q - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 Rae8 (not 17.Nd2) (0)
          • C89q - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 Rae8 17.Nd2 (not 17...Re6, 17...f5) (8)
          • C89r - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 Rae8 17.Nd2 f5 — Main Line (2)
          • C89s - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 Rae8 17.Nd2 Re6 (not 18.Bxd5, 18.Qf1, 18.a4, 18.c4) (2)
          • C89t - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 Rae8 17.Nd2 Re6 18.c4 — Main Line (0)
          • C89u - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 Rae8 17.Nd2 Re6 18.Bxd5 — Main Line (0)
          • C89v - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 Rae8 17.Nd2 Re6 18.Qf1 — Main Line (5)
          • C89w - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 Rae8 17.Nd2 Re6 18.a4 (not 18...f5) (5)
          • C89y - 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Be3 Bg4 16.Qd3 Rae8 17.Nd2 Re6 18.a4 f5 — Main Line (1)
      • C89b - 9.exd5 (not 9...e4) (0)
      • C89b - 9.exd5 e4 (1)
    • C90-C99 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 Ruy Lopez, closed (821)
      • C90a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O - Ruy Lopez: Closed (67)
        • 9.d3 Na5 (46)
          • C90g - 10.Bc2 (not 10...c5) (0)
          • C90g - 10.Bc2 c5 (not 11.Nbd2) (2)
          • C90g - 9...Na5 (not 10.Bc2) (0)
          • C90h - 10.Bc2 c5 11.Nbd2 (not 11...Nc6, 11...Qc7, 11...Re8) (4)
          • C90i - 10.Bc2 c5 11.Nbd2 Qc7 (2)
          • C90j - 10.Bc2 c5 11.Nbd2 Nc6 (10)
          • C90k - 10.Bc2 c5 11.Nbd2 Re8 (not 12.Nf1) (0)
          • C90k - 10.Bc2 c5 11.Nbd2 Re8 12.Nf1 (not 12...Bf8, 12...Nc6, 12...h6) (2)
          • C90l - 10.Bc2 c5 11.Nbd2 Re8 12.Nf1 Nc6 (16)
          • C90m - 10.Bc2 c5 11.Nbd2 Re8 12.Nf1 Bf8 (4)
          • C90n - 10.Bc2 c5 11.Nbd2 Re8 12.Nf1 h6 (6)
      • C90b - 9.Bc2 (0)
      • C90c - 9.a3 (6)
      • C90d - 9.a4 (not 9...Bg4) (0)
      • C90d - 9.a4 Bg4 (9)
      • C90e - 9.d3 (not 9...h6) (6)
      • C90f - 9.d3 h6 (0)
      • C91a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 - Ruy Lopez: Closed, Yates Variation (84)
        • 9...Bg4 10.d5 Na5 (30)
          • C91f - 10...Na5 (not 11.Bc2) (0)
          • C91f - 11.Bc2 (not 11...Qc8, 11...c6) (0)
          • C91g - 11.Bc2 Qc8 (11)
          • C91h - 11.Bc2 c6 (4)
          • C91i - 11.Bc2 c6 12.h3 Bc8 (15)
      • C91b - 9...Bg4 (not 10.Be3, 10.d5) (1)
      • C91c - 10.Be3 (not 10...exd4) (19)
      • C91d - 9...Bg4 10.Be3 exd4 (34)
      • C91e - 9...Bg4 10.d5 (not 10...Na5) (0)
      • C92a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 - Ruy Lopez: Closed (274)
        • 9...Bb7 10.d4 Re8 (184)
          • C92k - 10...Re8 (not 11.Nbd2, 11.Ng5) (10)
          • C92l - 11.Ng5 (2)
          • C92m - 11.Nbd2 (11)
          • C92n - 11.Nbd2 Bf8 12.d5 Nb8 (31)
          • C92o - 11.Nbd2 Bf8 12.Bc2 (33)
          • C92p - 11.Nbd2 Bf8 12.a3 (46)
          • C92q - 11.Nbd2 Bf8 12.a4 (not 12...h6) (12)
          • C92r - 11.Nbd2 Bf8 12.a4 h6 (not 13.Bc2) (1)
          • C92s - 11.Nbd2 Bf8 12.a4 h6 13.Bc2 (not 13...exd4) (8)
          • C92t - 11.Nbd2 Bf8 12.a4 h6 13.Bc2 exd4 (6)
          • C92u - 11.Nbd2 Bf8 12.a4 h6 13.Bc2 exd4 14.cxd4 Nb4 15.Bb1 c5 (24)
        • 9...Bd7 - Closed (1)
        • 9...Nd7 10.d4 Bf6 (26)
          • C92f - 10...Bf6 (not 11.a4) (6)
          • C92g - 11.a4 (15)
          • C92h - 11.a4 Bb7 12.Na3 (5)
        • 9...Re8 (2)
      • C92b - 9...a5 (6)
      • C92c - 9...Be6 - Kholmov Variation (9)
      • C92d - 9...Be6 10.d4 Bxb3 11.Qxb3 (7)
      • C92e - 9...Nd7 (not 10.d4) (16)
      • C92i - 9...Bb7 (not 10.d4) (7)
      • C92j - 9...Bb7 10.d4 (not 10...Re8) (10)
      • C93 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 h6 - Ruy Lopez: Closed, Smyslov Defense (18)
      • C94a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 - Ruy Lopez: Closed, Breyer Defense (6)
        • 10.d3 Nbd7 (4)
          • C94d - 10...Nbd7 (not 11.Nbd2) (0)
          • C94e - 11.Nbd2 (not 11...Bb7) (0)
          • C94f - 11.Nbd2 Bb7 (4)
      • C94b - 10.a4 (0)
      • C94c - 10.d3 (not 10...Nbd7) (2)
      • C95a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 - Ruy Lopez: Closed, Breyer (206)
        • 10...Nbd7 11.Nbd2 Bb7 — Main Line (182)
          • C95f - 11...Bb7 (not 12.Bc2, 12.a4) (0)
          • C95f - 12.a4 (12)
          • C95g - 12.Bc2 (not 12...Re8, 12...c5) (0)
          • C95g - 12.Bc2 c5 (6)
          • C95h - 12.Bc2 Re8 (not 13.Nf1, 13.a4, 13.b4) (4)
          • C95i - 12.Bc2 Re8 13.b4 — Main Line (4)
          • C95j - 12.Bc2 Re8 13.a4 — Main Line (36)
          • C95k - 12.Bc2 Re8 13.Nf1 (not 13...Bf8) (0)
          • C95k - 12.Bc2 Re8 13.Nf1 Bf8 (not 14.Ng3) (0)
          • C95k - 12.Bc2 Re8 13.Nf1 Bf8 14.Ng3 (not 14...c5, 14...g6) (0)
          • C95k - 12.Bc2 Re8 13.Nf1 Bf8 14.Ng3 c5 — Main Line (20)
          • C95l - 12.Bc2 Re8 13.Nf1 Bf8 14.Ng3 g6 (not 15.a4, 15.b3) (0)
          • C95l - 12.Bc2 Re8 13.Nf1 Bf8 14.Ng3 g6 15.b3 — Main Line (40)
          • C95m - 12.Bc2 Re8 13.Nf1 Bf8 14.Ng3 g6 15.a4 (not 15...c5) (21)
          • C95n - 12.Bc2 Re8 13.Nf1 Bf8 14.Ng3 g6 15.a4 c5 — Main Line (7)
          • C95o - 12.Bc2 Re8 13.Nf1 Bf8 14.Ng3 g6 15.a4 c5 16.d5 c4 — Main Line (32)
      • C95a - 10...Bb7 (0)
      • C95b - 10...Nbd7 (not 11.Bg5, 11.Nbd2, 11.Nh4, 11.c4) (7)
      • C95c - 10...Nbd7 11.Nh4 (1)
      • C95d - 10...Nbd7 11.Bg5 (3)
      • C95e - 10...Nbd7 11.c4 (not 11...c6) (0)
      • C95e - 10...Nbd7 11.c4 c6 (13)
      • C95f - 10...Nbd7 11.Nbd2 (not 11...Bb7) (0)
      • C96a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 - Ruy Lopez: Closed, Chigorin Defense (33)
        • 10.Bc2 c5 (33)
          • C97a - 11...Qc7 (not 12.Nbd2, 12.d5) (0)
          • C97b - 12.d5 (not 12...c4) (13)
          • C97c - 11.d4 Qc7 12.d5 c4 (0)
          • C97d - 12.Nbd2 (not 12...Bb7, 12...Bd7, 12...Rd8, 12...Re8) (2)
          • C97e - 11.d4 Qc7 12.Nbd2 Bb7 (0)
          • C97f - 11.d4 Qc7 12.Nbd2 Re8 (5)
          • C97g - 11.d4 Qc7 12.Nbd2 Rd8 (4)
          • C97h - 12.Nbd2 Bd7 (not 13.Nf1) (1)
          • C97i - 12.Nbd2 Bd7 13.Nf1 (not 13...Nc4, 13...Rfe8) (0)
          • C97j - 11.d4 Qc7 12.Nbd2 Bd7 13.Nf1 Nc4 (5)
          • C97k - 11.d4 Qc7 12.Nbd2 Bd7 13.Nf1 Rfe8 (3)
          • C97l - 11.d4 Qc7 12.Nbd2 Bd7 13.Nf1 Rfe8 14.Ne3 g6 (0)
      • C96b - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 - Ruy Lopez: Closed, Chigorin Defense (63)
        • 10...c5 11.d4 Bb7 (9)
          • C96k - 11...Bb7 (not 12.Nbd2) (7)
          • C96l - 12.Nbd2 (2)
        • 10...c5 11.d4 Nd7 (40)
          • C96n - (not 12.Nbd2) (35)
          • C96o - 12.Nbd2 cxd4 (5)
      • C96c - 10...c6 (not 11.d4) (0)
      • C96d - 10...c6 11.d4 Qc7 (0)
      • C96e - 10...Bb7 (1)
      • C96f - 10...c5 (not 11.d3, 11.d4) (0)
      • C96g - 10...c5 11.d3 (not 11...Nc6) (0)
      • C96h - 10...c5 11.d3 Nc6 (2)
      • C96i - 10...c5 11.d4 (not 11...Nc6, 11...cxd4) (0)
      • C96j - 10...c5 11.d4 cxd4 (5)
      • C96m - 10...c5 11.d4 Nc6 (4)
      • C98 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 - Ruy Lopez: Closed, Chigorin Defense (3)
        • 13.d5 Nd8 (3)
          • C98g - 13...Nd8 (not 14.Nf1, 14.a4) (0)
          • C98h - 14.Nf1 (1)
          • C98i - 14.a4 (2)
        • 13.dxc5 dxc5 (0)
          • C98b - 13...dxc5 (not 14.Nf1) (0)
          • C98c - 14.Nf1 (not 14...Be6) (0)
          • C98d - 14.Nf1 Be6 (0)
        • C98b - 13.dxc5 (not 13...dxc5) (0)
        • C98e - 13.d5 (not 13...Na5) (0)
        • C98f - 13.d5 Na5 (0)
      • C99a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4 - Ruy Lopez: Closed, Chigorin Defense, Panov System (67)
        • 13...Bd7 14.Nf1 Rac8 (8)
          • C99d - 15.Ne3 (8)
          • C99e - 13...Bb7 14.Nf1 Rac8 (not 15.Re2) (0)
          • C99f - 15.Re2 (0)
        • 13...Nc6 14.Nb3 a5 (31)
          • C99l - (not 15.Be3) (0)
          • C99m - 15.Be3 a4 (1)
          • C99n - 15.Be3 a4 16.Nbd2 Nb4 (3)
          • C99o - 15.Be3 a4 16.Nbd2 Bd7 (27)
      • C99b - 13...Rd8 (9)
      • C99c - 13...Bd7 (not 14.Nf1) (0)
      • C99c - 13...Bd7 14.Nf1 (not 14...Rac8) (4)
      • C99e - 13...Bb7 (not 14.Nf1, 14.d5) (0)
      • C99e - 13...Bb7 14.Nf1 (not 14...Rac8) (0)
      • C99g - 13...Bb7 14.d5 (not 14...Rac8) (2)
      • C99h - 13...Bb7 14.d5 Rac8 (3)
      • C99i - 13...Nc6 (not 14.Nb3, 14.Nf1, 14.a3, 14.d5) (0)
      • C99i - 13...Nc6 14.a3 (7)
      • C99j - 13...Nc6 14.Nf1 (0)
      • C99k - 13...Nc6 14.d5 (2)
      • C99l - 13...Nc6 14.Nb3 (not 14...a5) (0)
  • SÉRIE D (11338)
    • D00-D06 1. d4 d5 Queen's pawn game (1367)
      • D00a - 1. d4 d5 - Queen's Pawn Game (495)
        • 2.Bg5 d5 (198)
          • D00i - 3.e3 (not 3...e6) (0)
          • D00i - 3.Nd2 (0)
          • D00j - 3.Bxf6 (not 3...exf6, 3...gxf6) (0)
          • D00j - 3.Bxf6 gxf6 (not 4.e3) (0)
          • D00j - 3.Bxf6 gxf6 4.e3 (not 4...c5) (0)
          • D00j - 3.Bxf6 gxf6 4.e3 c5 (69)
          • D00k - 3.Bxf6 exf6 (not 4.e3) (0)
          • D00k - 3.Bxf6 exf6 4.e3 (not 4...Bd6, 4...Be6, 4...Bf5, 4...c6) (0)
          • D00k - 3.Bxf6 exf6 4.e3 Bd6 (0)
          • D00k - 3.Bxf6 exf6 4.e3 Be6 (0)
          • D00k - 3.Bxf6 exf6 4.e3 Bf5 (26)
          • D00k - 3.Bxf6 exf6 4.e3 c6 (0)
        • 2.Bg5 h6 (21)
          • D00h - (not 3.Bh4) (0)
          • D00h - 3.Bh4 c6 (not 4.e3) (0)
          • D00h - 3.Bh4 c6 4.e3 (not 4...Qb6) (0)
          • D00h - 3.Bh4 c6 4.e3 Qb6 (21)
        • 2.c3 Nf6 (4)
          • D00b - 2...Nf6 (not 3.Bf4, 3.Bg5) (0)
          • D00b - 3.Bf4 (4)
          • D00b - 3.Bg5 (0)
        • 2.e3 Nf6 (0)
          • D00d - 2...Nf6 (not 3.Bd3) (0)
          • D00e - 3.Bd3 (0)
        • 2.e4 dxe4 (0)
          • D00l - 2...dxe4 (not 3.Bc4, 3.Nc3, 3.f3) (0)
          • D00l - 3.Bc4 (0)
          • D00l - 3.f3 (0)
          • D00l - 3.Nc3 (not 3...Bd7, 3...Bf5, 3...e5, 3...f5) (0)
          • D00l - 3.Nc3 Bd7 (0)
          • D00l - 3.Nc3 Bf5 (0)
          • D00l - 3.Nc3 f5 (0)
          • D00m - 3.Nc3 e5 (not 4.Nge2, 4.Qh5) (0)
          • D00m - 3.Nc3 e5 4.Nge2 (0)
          • D00m - 3.Nc3 e5 4.Qh5 (0)
        • 2.Nc3 Nf6 — Main Line (136)
          • D00p - 3.Nf3 (not 3...g6) (0)
          • D00p - 3.Nf3 g6 (not 4.Bf4) (2)
          • D00q - 3.Nf3 g6 4.Bf4 (17)
          • D00r - 3.Nf3 g6 4.Bf4 Bg7 5.e3 O-O 6.Be2 — Main Line (6)
          • D00s - 3.e4 (not 3...Nxe4, 3...dxe4) (0)
          • D00s - 3.e4 Nxe4 (0)
          • D00t - 3.e4 dxe4 (not 4.Bg5, 4.f3) (0)
          • D00t - 3.e4 dxe4 4.Bg5 (0)
          • D00u - 3.e4 dxe4 4.f3 (not 4...Bf5, 4...Nc6, 4...c6, 4...e3, 4...e5, 4...e6, 4...exf3) (0)
          • D00u - 3.e4 dxe4 4.f3 Bf5 — Vienna (0)
          • D00u - 3.e4 dxe4 4.f3 c6 (0)
          • D00u - 3.e4 dxe4 4.f3 e3 (0)
          • D00u - 3.e4 dxe4 4.f3 e5 (0)
          • D00u - 3.e4 dxe4 4.f3 e6 (0)
          • D00u - 3.e4 dxe4 4.f3 Nc6 (0)
          • D00v - 3.e4 dxe4 4.f3 exf3 (not 5.Nxf3, 5.Qxf3) (0)
          • D00v - 3.e4 dxe4 4.f3 exf3 5.Qxf3 (0)
          • D00w - 3.e4 dxe4 4.f3 exf3 5.Nxf3 (not 5...Bf5, 5...Bg4, 5...c6, 5...g6) (0)
          • D00w - 3.e4 dxe4 4.f3 exf3 5.Nxf3 Bf5 (0)
          • D00w - 3.e4 dxe4 4.f3 exf3 5.Nxf3 Bg4 — Tartakower (0)
          • D00w - 3.e4 dxe4 4.f3 exf3 5.Nxf3 c6 (0)
          • D00y - 3.e4 dxe4 4.f3 exf3 5.Nxf3 g6 (0)
        • D00i - 1. d4 Nf6 2. Bg5 d5 - Trompowsky Attack (18)
          • 3.e3 c5 (7)
          • 3.e3 c6 (2)
          • 3.e3 Nbd7 (1)
          • 3.Nd2 Bf5 (1)
          • 3.Nd2 c5 (3)
          • 3.Nd2 c6 (1)
          • 3.Nd2 e6 (1)
        • D00i - 3.e3 e6 (105)
      • D00a - 2.f4 (1)
      • D00a - 2.g3 (0)
      • D00b - 2.c3 (2)
      • D00c - 2.Bf4 (not 2...c5) (0)
      • D00c - 2.Bf4 c5 - Steinitz Countergambit (97)
      • D00d - 2.e3 (not 2...Nf6) (0)
      • D00f - 2.Bg5 (not 2...Bg4, 2...c6, 2...f6, 2...g6) (3)
      • D00f - 2.Bg5 Bg4 (12)
      • D00f - 2.Bg5 f6 (0)
      • D00f - 2.Bg5 g6 (0)
      • D00g - 2.Bg5 c6 (7)
      • D00l - 2.e4 (not 2...e5) (0)
      • D00l - 2.e4 e5 (0)
      • D00n - 2.Nc3 (not 2...Bf5) (0)
      • D00n - 2.Nc3 Bf5 (14)
      • D00o - 1. d4 d5 2. Nc3 Nf6 3. Bf4 - Rapport-Jobava System (138)
        • 3...a6 (1)
        • 3...Bf5 (2)
        • 3...c5 (5)
        • 3...c6 (1)
        • 3...e6 (2)
        • 3...g6 (2)
      • D01a - 3.Bg5 (not 3...Bf5, 3...Nbd7, 3...Ne4, 3...c5, 3...c6, 3...e6, 3...g6, 3...h6) (0)
      • D01b - 3...Ne4 (0)
      • D01c - 3...e6 (0)
      • D01d - 3...h6 (1)
      • D01e - 3...g6 (0)
      • D01f - 3...c6 (5)
      • D01g - 3...c5 (1)
      • D01h - 3...Bf5 (not 4.Bxf6, 4.Nf3, 4.f3) (0)
      • D01i - 3...Bf5 4.f3 (0)
      • D01j - 3...Bf5 4.Nf3 (0)
      • D01k - 3...Bf5 4.Bxf6 (1)
      • D01l - 3...Nbd7 (not 4.Nf3, 4.f3) (2)
      • D01m - 3...Nbd7 4.f3 (0)
      • D01n - 3...Nbd7 4.Nf3 (not 4...g6, 4...h6) (1)
      • D01o - 3...Nbd7 4.Nf3 h6 (0)
      • D01p - 3...Nbd7 4.Nf3 g6 (3)
      • D02a - 1. d4 d5 2. Nf3 - Queen's Pawn Game: Zukertort Variation (591)
        • 2...e6 3.Bf4 (7)
        • 2...e6 3.c4 Nc6 4.Nc3 a6 5.cxd5 exd5 6.Bf4 (1)
      • D02c - 2...c6 3.Bf4 (not 3...Qb6) (0)
      • D02c - 3...Qb6 (7)
      • D02d - 2...Bf5 3.e3 (not 3...c6) (0)
      • D02d - 3...c6 (0)
      • D02d - 3...e6 (10)
      • D02g - 2...Nc6 3.g3 (not 3...Bg4) (0)
      • D02g - 3...Bg4 (33)
      • D02i - 2...e6 3.g3 c5 (not 4.Bg2) (0)
      • D02i - 3...c5 4.Bg2 (not 4...cxd4) (0)
      • D02j - 2...c5 - Krause Variation (1)
      • D02j - 3.c3 (not 3...Qb6, 3...c6, 3...e6, 3...Bg4, 3...c5, 3...Bf5, 3...g6, 4.Bg2, 4.e3) (0)
      • D02j - 3.c4 (not 3...Qb6, 3...c6, 3...e6, 3...Bg4, 3...c5, 3...Bf5, 3...g6, 4.Bg2, 4.e3) (0)
      • D02j - 3.dxc5 (not 3...Qb6, 3...c6, 3...e6, 3...Bg4, 3...c5, 3...Bf5, 3...g6, 4.Bg2, 4.e3) (8)
      • D02k - 1. d4 d5 2. Nf3 Nf6 - Queen's Pawn Game: Symmetrical Variation (564)
      • D02k - 3.c3 - Symmetrical Variation (10)
      • D02l - 1. d4 d5 2. Nf3 Nf6 3. Bf4 - Queen's Pawn Game: London System (479)
        • 3...c5 4.Bg2 cxd4 (8)
          • D02i - 5.Nxd4 (not 5...e5) (0)
          • D02i - 5.Nxd4 e5 (8)
        • 3...c5 4.e3 e6 (76)
          • D02p - (not 5.c3) (0)
          • D02p - 5.c3 Nc6 (76)
        • 3...c6 4.Bg2 Bg4 (14)
          • D02t - 4...Bg4 (not 5.O-O) (0)
          • D02t - 5.O-O (not 5...Nbd7) (0)
          • D02t - 5.O-O Nbd7 (not 6.Nbd2) (0)
          • D02t - 5.O-O Nbd7 6.Nbd2 e6 (14)
        • 3...g6 4.Bg2 Bg7 (55)
          • D02u - (not 5.O-O) (0)
          • D02u - 5.O-O O-O (55)
        • D02 - 1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 - Queen's Pawn Game: London System (17)
          • 4.dxc5 (1)
          • D02 - 1. d4 Nf6 2. Nf3 d5 3. Bf4 c5 4. e3 - London System (16)
            • 4...e6 5.Nbd2 (2)
            • 4...Nc6 5.Bb5 (1)
            • 4...Nc6 5.Be2 (1)
            • 4...Nc6 5.c3 (2)
            • 4...Nc6 5.Nbd2 (10)
      • D02m - 3...Bf5 - London (41)
      • D02n - 3...e6 - London (69)
      • D02o - 3...c5 - London (132)
      • D02q - 3...e6 4.e3 c5 5.c3 Nc6 6.Bd3 Bd6 (0)
      • D02r - 3.g3 (20)
      • D02s - 2...Nf6 3.g3 c6 (not 4.Bg2) (0)
      • D02s - 3...c6 4.Bg2 (not 4...Bg4) (3)
      • D02u - 3...g6 (not 4.Bg2) (0)
      • D03a - 1. d4 d5 2. Nf3 Nf6 3. Bg5 - Queen's Pawn Game (111)
        • 3...e6 4.e3 c5 (13)
          • D03g - (not 5.Nbd2) (2)
          • D03h - 5.Nbd2 Nbd7 (2)
          • D03i - 5.Nbd2 Be7 (4)
          • D03j - 5.Nbd2 Be7 6.c3 Nbd7 (5)
        • 3...e6 4.e3 Nbd7 (1)
          • D03f - (not 5.Nbd2) (0)
          • D03f - 5.Nbd2 Be7 (1)
        • 3...g6 4.e3 Bg7 (15)
          • D03n - 5.Nbd2 (not 5...O-O) (4)
          • D03o - 5...O-O (not 6.Bd3) (11)
          • D03s - 5.Nbd2 O-O 6.Bd3 (0)
        • 3...g6 4.Nbd2 Bg7 (43)
          • D03l - (not 5.e3) (0)
          • D03p - 5.e3 O-O 6.c3 (not 6...Nbd7) (11)
          • D03q - 5.e3 O-O 6.c3 Nbd7 (not 7.Be2) (8)
          • D03r - 5.e3 O-O 6.c3 Nbd7 7.Be2 (16)
          • D03t - 5.e3 O-O 6.Bd3 c5 (not 7.c3) (0)
          • D03t - 5.e3 O-O 6.Bd3 c5 7.c3 (not 7...Nbd7) (7)
          • D03u - 5.e3 O-O 6.Bd3 c5 7.c3 Nbd7 (1)
        • D03m - 1...Nf6 2.Bg5 d5 3.e3 g6 4.Nf3 Bg7 - Main Line (1)
      • D03b - 3...Ne4 (not 4.Bf4) (15)
      • D03c - 3...Ne4 4.Bf4 (5)
      • D03d - 3...e6 (not 4.e3) (3)
      • D03e - 3...e6 4.e3 (not 4...Nbd7, 4...c5) (4)
      • D03k - 3...g6 (not 4.Nbd2, 4.e3) (0)
      • D03k - 3...g6 4.c3 Bg7 (2)
      • D03l - 3...g6 4.Nbd2 (not 4...Bg7) (0)
      • D03m - 3...g6 4.e3 (not 4...Bg7) (0)
      • D04a - 1. d4 d5 2. Nf3 Nf6 3. e3 - Queen's Pawn Game (38)
      • D04b - 3...Bg4 (0)
      • D04c - 3...Bf5 (not 4.Bd3) (1)
      • D04d - 3...Bf5 4.Bd3 e6 (0)
      • D04e - 3...g6 (1)
      • D04f - 3...c6 (0)
      • D04g - 3...c5 (not 4.c3) (22)
      • D04h - 3...c5 4.c3 (not 4...Nbd7, 4...Nc6) (3)
      • D04i - 3...c5 4.c3 Nc6 (0)
      • D04j - 3...c5 4.c3 Nbd7 (1)
      • D05a - 1. d4 d5 2. Nf3 Nf6 3. e3 e6 - Queen's Pawn Game (51)
        • 4.Bd3 c5 (30)
          • D05e - (not 5.b3, 5.c3) (5)
          • D05g - 5.b3 Nc6 (10)
          • D05i - 5.c3 Nbd7 (0)
          • D05j - 5.c3 Nc6 (not 6.Nbd2) (0)
          • D05k - 5.c3 Nc6 6.Nbd2 (not 6...Bd6) (2)
          • D05l - 5.c3 Nc6 6.Nbd2 Bd6 (0)
          • D05m - 5.c3 Nc6 6.Nbd2 Bd6 7.O-O O-O (1)
          • D05n - 5.c3 Nc6 6.Nbd2 Bd6 7.O-O O-O 8.dxc5 Bxc5 (2)
      • D05b - 4.Nbd2 (not 4...c5) (2)
      • D05c - 2.Nf3 c5 3.e3 Nf6 4.Nbd2 e6 5.b3 - Zukertort Variation (6)
      • D05d - 4.Bd3 (14)
      • D05f - 5.b3 - Rubinstein’s Attack (10)
      • D05h - 5.c3 (2)
      • D06a - 1. d4 d5 2. c4 - Queen's Gambit (45)
        • 2...Bf5 3.cxd5 Bxb1 (1)
          • D06s - 4.Rxb1 (0)
          • D06t - 4.Qa4+ (1)
          • D06u - 4.Qa4+ c6 5.Rxb1 (0)
        • 2...Bf5 3.Nf3 e6 (28)
          • D06n - 3...e6 (not 4.Nc3, 4.Qb3) (1)
          • D06o - 4.Qb3 (3)
          • D06p - 4.Nc3 (not 4...Nf6) (6)
          • D06q - 4.Nc3 Nf6 (18)
        • 2...c5 3.cxd5 Nf6 (13)
          • D06b - 4.dxc5 (7)
          • D06d - 4.Nf3 cxd4 (6)
        • 2...c5 3.cxd5 Qxd5 (1)
        • 2...Nf6 3.cxd5 Nxd5 (0)
          • D06i - 3...Nxd5 (not 4.Nf3, 4.e4) (0)
          • D06j - 4.Nf3 (0)
          • D06k - 4.e4 (0)
      • D06b - 2...c5 (not 3.cxd5) (0)
      • D06b - 2...c5 3.cxd5 Nf6 - Rubinstein Variation (2)
      • D06e - 2...Nf6 (not 3.Nc3, 3.cxd5) (0)
      • D06f - 2...Nf6 3.Nc3 (0)
      • D06g - 1. d4 Nf6 2. Nf3 d5 3. c4 - Queen's Pawn Game: Symmetrical Variation (13)
        • D02 - 1. Nf3 d5 2. d4 Nf6 3. c4 c5 - Queen's Pawn Game: Symmetrical Variation (7)
          • 4.dxc5 - Symmetrical Variation (1)
          • 4.e3 - Symmetrical Variation (1)
          • D06c - 4.cxd5 - Symmetrical Variation (5)
      • D06h - 2...Nf6 3.cxd5 (not 3...Nxd5) (0)
      • D06l - 2...Bf5 (not 3.Nc3, 3.Nf3, 3.Qb3, 3.cxd5) (0)
      • D06l - 2...Bf5 3.Qb3 (0)
      • D06m - 2...Bf5 3.Nc3 (not 3...e6) (0)
      • D06m - 2...Bf5 3.Nc3 e6 (0)
      • D06n - 2...Bf5 3.Nf3 (not 3...e6) (0)
      • D06r - 2...Bf5 3.cxd5 (not 3...Bxb1) (0)
      • D11g - 3...c6 - Symmetrical Variation (2)
      • D30q - 3...e6 - Symmetrical Variation (10)
    • D07-D09 1. d4 d5 2. c4 Nc6 Queen's Gambit Declined, Chigorin defence (54)
      • D07a - 1. d4 d5 2. c4 Nc6 - Queen's Gambit Declined: Chigorin Defense (37)
        • 3.cxd5 Qxd5 — Main Line (8)
          • D07c - 6...Bxc3 (not 7.bxc3) (3)
          • D07d - 4.e3 e5 5.Nc3 Bb4 6.Bd2 Bxc3 7.bxc3 — Main Line (5)
        • 3.Nc3 dxc4 (11)
          • D07s - 3...dxc4 (not 4.Nf3, 4.d5) (2)
          • D07t - 4.d5 (3)
          • D07u - 4.Nf3 (not 4...Nf6) (1)
          • D07v - 4.Nf3 Nf6 (not 5.e4) (3)
          • D07w - 4.Nf3 Nf6 5.e4 (2)
        • 3.Nc3 Nf6 (0)
          • D07p - 3...Nf6 (not 4.Nf3) (0)
          • D07q - 4.Nf3 (not 4...Bg4) (0)
          • D07r - 4.Nf3 Bg4 (0)
        • 3.Nf3 Bg4 (16)
          • D07h - 3...Bg4 (not 4.Nc3, 4.cxd5, 4.e3) (1)
          • D07i - 4.e3 (0)
          • D07j - 4.Nc3 (10)
          • D07k - 4.cxd5 (0)
          • D07l - 4.cxd5 Bxf3 5.dxc6 (0)
          • D07m - 4.cxd5 Bxf3 5.gxf3 (5)
      • D07b - 3.e3 (1)
      • D07c - 3.cxd5 (not 3...Qxd5) (0)
      • D07f - 3.Nf3 (not 3...e5) (0)
      • D07g - 3.Nf3 e5 (0)
      • D07n - 3.Nc3 (not 3...e5) (0)
      • D07o - 3.Nc3 e5 (0)
      • D08 - 1. d4 d5 2. c4 e5 - Queen's Gambit Declined: Albin Countergambit (9)
      • D09 - 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 - Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation (8)
    • D10-D19 1. d4 d5 2. c4 c6 Queen's Gambit Slav defence (1903)
      • D10b - 3.cxd5 - Exchange (93)
      • D10e - 4.cxd5 cxd5 5.Bf4 - 4.Nc3 Nf6 5.Bf4 (1)
      • D10i - 1. d4 d5 2. c4 c6 3. Nc3 - Slav Defense (127)
      • D10r - 1. d4 d5 2. c4 c6 3. Nc3 Nf6 - Slav Defense (3)
      • D10u - 4.e3 (2)
      • D11 - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4.... - Slav Defense (381)
        • 4.e3 b5 (6)
          • D11f - 4...b5 (not 5.a4) (0)
          • D11f - 5.a4 (not 5...e6) (0)
          • D11f - 5.a4 e6 (6)
        • 4.e3 Bg4 (148)
          • D11t - 5.Nc3 (148)
        • 4.g3 Bf5 (31)
          • D11o - 4...Bf5 (not 5.Bg2) (0)
          • D11o - 5.Bg2 (not 5...e6) (0)
          • D11o - 5.Bg2 e6 (not 6.O-O) (0)
          • D11o - 5.Bg2 e6 6.O-O (not 6...Be7, 6...Nbd7, 6...h6) (0)
          • D11o - 5.Bg2 e6 6.O-O Be7 (0)
          • D11o - 5.Bg2 e6 6.O-O Nbd7 (27)
          • D11p - 5.Bg2 e6 6.O-O h6 (not 7.Nbd2, 7.Nc3, 7.b3) (0)
          • D11p - 5.Bg2 e6 6.O-O h6 7.b3 (0)
          • D11p - 5.Bg2 e6 6.O-O h6 7.Nbd2 (4)
          • D11p - 5.Bg2 e6 6.O-O h6 7.Nc3 (0)
        • 4.g3 Bg4 (22)
          • D11m - 4...Bg4 (not 5.Bg2) (0)
          • D11m - 5.Bg2 (not 5...e6) (0)
          • D11m - 5.Bg2 e6 (not 6.O-O) (0)
          • D11m - 5.Bg2 e6 6.O-O (not 6...Nbd7) (0)
          • D11m - 5.Bg2 e6 6.O-O Nbd7 (not 7.Nbd2, 7.b3) (0)
          • D11m - 5.Bg2 e6 6.O-O Nbd7 7.Nbd2 (not 7...Bd6, 7...Be7) (0)
          • D11m - 5.Bg2 e6 6.O-O Nbd7 7.Nbd2 Bd6 (15)
          • D11m - 5.Bg2 e6 6.O-O Nbd7 7.Nbd2 Be7 (0)
          • D11n - 5.Bg2 e6 6.O-O Nbd7 7.b3 (not 7...Bd6, 7...Be7) (0)
          • D11n - 5.Bg2 e6 6.O-O Nbd7 7.b3 Bd6 (not 8.Bb2) (0)
          • D11n - 5.Bg2 e6 6.O-O Nbd7 7.b3 Bd6 8.Bb2 (not 8...O-O) (0)
          • D11n - 5.Bg2 e6 6.O-O Nbd7 7.b3 Bd6 8.Bb2 O-O 9.Nbd2 (7)
          • D11n - 5.Bg2 e6 6.O-O Nbd7 7.b3 Be7 (not 8.Bb2) (0)
          • D11n - 5.Bg2 e6 6.O-O Nbd7 7.b3 Be7 8.Bb2 (not 8...O-O) (0)
          • D11n - 5.Bg2 e6 6.O-O Nbd7 7.b3 Be7 8.Bb2 O-O 9.Nbd2 (0)
        • 4.Nc3 e6 (9)
          • D11c - 4...e6 (not 5.Qb3) (6)
          • D11d - 5.Qb3 (3)
        • D11b - 3...Bg4 (not 4.Nc3, 4.e3, 4.Qb3, 4.Qc2, 4.Nbd2, 4.g3) (0)
        • D11c - 3...Bf5 (not 4.Nc3) (0)
        • D11c - 4.Nc3 (not 4...e6) (0)
        • D11e - 3...dxc4 (not 4.Nc3, 4.e3) (0)
        • D11e - 3...dxc4 4.e3 (not 4...Be6) (0)
        • D11e - 4.e3 Be6 (5)
        • D11e - 4.Nc3 (0)
        • D11h - 4.Qb3 - Modern Line (21)
        • D11i - 4.Qc2 (not 4...g6) (16)
        • D11j - 4.Qc2 g6 5.Bf4 (12)
        • D11k - 4.Nbd2 (20)
        • D11l - 4.g3 (not 4...Bf5, 4...Bg4) (14)
        • D11q - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 - Slav Defense: Quiet Variation (5)
        • D11r - 4...g6 - Quiet Variation (7)
        • D11s - 4...a6 - Quiet Variation (67)
        • D11t - 4...Bg4 (1)
      • D12a - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 - Slav Defense: Quiet Variation, Schallopp Defense (279)
        • 5.cxd5 cxd5 (14)
          • D12c - 5...cxd5 (not 6.Nc3, 6.Qb3) (0)
          • D12d - 6.Qb3 (not 6...Qc7) (2)
          • D12e - 6.Qb3 Qc7 (10)
          • D12f - 6.Nc3 (not 6...e6) (0)
          • D12f - 6.Nc3 e6 7.Ne5 Nfd7 (2)
        • 5.Nc3 e6 (255)
          • D12i - 5...e6 (not 6.Bd3, 6.Be2, 6.Nh4) (29)
          • D12j - 6.Be2 (2)
          • D12k - 6.Bd3 (not 6...Bxd3) (7)
          • D12l - 6.Bd3 Bxd3 (not 7.Qxd3) (0)
          • D12l - 6.Bd3 Bxd3 7.Qxd3 (not 7...Nbd7) (2)
          • D12m - 6.Bd3 Bxd3 7.Qxd3 Nbd7 (6)
          • D12n - 6.Nh4 (not 6...Be4, 6...Bg4) (112)
          • D12o - 6.Nh4 Bg4 (4)
          • D12p - 6.Nh4 Be4 (93)
      • D12b - 5.Qb3 (0)
      • D12c - 5.cxd5 (not 5...cxd5) (0)
      • D12g - 5.Bd3 (not 5...Bxd3) (1)
      • D12h - 5.Bd3 Bxd3 (1)
      • D12i - 5.Nc3 (not 5...e6) (0)
      • D13b - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 - Slav Defense: Exchange Variation (92)
        • 5.Nc3 a6 — Exchange (13)
          • D13e - 5...a6 (not 6.Bf4, 6.Ne5) (9)
          • D13f - 6.Ne5 (0)
          • D13g - 6.Bf4 (4)
        • 5.Nc3 e6 — Exchange (4)
          • D13h - 5...e6 (not 6.Bf4) (0)
          • D13i - 6.Bf4 (4)
        • 5.Nc3 Nc6 — Exchange (69)
          • D13j - 5...Nc6 (not 6.Bf4) (0)
          • D13k - 6.Bf4 (not 6...a6, 6...e6) (15)
          • D13l - 6.Bf4 a6 (not 7.e3) (33)
          • D13m - 6.Bf4 a6 7.e3 (not 7...Bg4) (0)
          • D13n - 6.Bf4 a6 7.e3 Bg4 (not 8.Be2) (4)
          • D13o - 6.Bf4 a6 7.e3 Bg4 8.Be2 (3)
          • D13p - 6.Bf4 e6 (not 7.e3) (0)
          • D13q - 6.Bf4 e6 7.e3 (not 7...Bd6, 7...Be7) (2)
          • D13r - 6.Bf4 e6 7.e3 Be7 (3)
          • D13s - 6.Bf4 e6 7.e3 Bd6 (5)
          • D13t - 6.Bf4 e6 7.e3 Bd6 8.Bxd6 Qxd6 (4)
      • D13c - 5.Nc3 (not 5...Bf5) (0)
      • D13d - 5.Nc3 Bf5 (0)
      • D14a - 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 Bf5 - Slav Defense: Exchange Variation, Symmetrical Line (71)
        • 7.e3 e6 — Exchange (53)
          • D14e - 8.Ne5 (8)
          • D14f - 8.Qb3 (1)
          • D14i - 8.Bd3 Bxd3 9.Qxd3 Bd6 (1)
          • D14j - 8.Bd3 Bxd3 9.Qxd3 Bd6 10.Bxd6 Qxd6 (0)
          • D14k - 8.Bd3 Bxd3 9.Qxd3 Bd6 10.Bxd6 Qxd6 11.O-O O-O (not 12.Rac1, 12.Rfc1) (0)
          • D14l - 8.Bd3 Bxd3 9.Qxd3 Bd6 10.Bxd6 Qxd6 11.O-O O-O 12.Rac1 — Main Line (5)
          • D14m - 8.Bd3 Bxd3 9.Qxd3 Bd6 10.Bxd6 Qxd6 11.O-O O-O 12.Rfc1 (not 12...Rfc8) (1)
          • D14n - 8.Bd3 Bxd3 9.Qxd3 Bd6 10.Bxd6 Qxd6 11.O-O O-O 12.Rfc1 Rfc8 — Main Line (4)
          • D14o - 8.Bb5 (not 8...Nd7) (0)
          • D14p - 8.Bb5 Nd7 (not 9.Qa4) (3)
          • D14q - 8.Bb5 Nd7 9.Qa4 (2)
        • 7.Qb3 - Symmetrical Line (2)
      • D14b - 1. Nf3 Nf6 2. c4 c6 3. d4 d5 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 - Slav Defense: Exchange Variation, Symmetrical Line (5)
      • D14c - 7.e3 a6 (4)
      • D14d - 1. Nf3 Nf6 2. c4 c6 3. d4 d5 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 - Slav Defense: Exchange Variation, Symmetrical Line (4)
      • D14g - 8.Qb3 Bb4 - Trifunovic Variation (28)
      • D14h - 8.Bd3 - Symmetrical Line (2)
      • D15a - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 - Slav Defense: Three Knights Variation (391)
      • D15b - 4...Bf5 (not 5.Qb3) (0)
      • D15b - 5.Qb3 (1)
      • D15c - 4...Qb6 (not 5.Qb3, 5.Bg5, 5.Ne5, 5.e3, 5.c5, 5.a4, 5.e4) (4)
      • D15d - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 - Slav Defense: Chebanenko Variation (389)
        • 5.a4 e6 (58)
          • D15m - 5...e6 (not 6.Bg5) (29)
          • D15n - 6.Bg5 (29)
        • 5.e3 b5 (115)
          • D15h - 4...a6 5.e3 b5 (not 6.b3) (47)
          • D15i - 6.b3 (62)
          • D15r - 4...dxc4 5.e3 b5 6.a4 b4 (not 7.Nb1) (1)
          • D15s - 6.a4 b4 7.Nb1 (5)
        • 5.e4 b5 (19)
          • D15t - 5...b5 (not 6.Qc2, 6.e5) (10)
          • D15u - 6.Qc2 (2)
          • D15v - 6.e5 (2)
          • D15w - 6.e5 Nd5 7.Ng5 (0)
          • D15y - 6.e5 Nd5 7.a4 e6 (5)
      • D15e - 5.Bg5 (5)
      • D15f - 5.Ne5 (3)
      • D15g - 5.e3 (not 5...b5) (72)
      • D15j - 4...a6 5.c5 (not 5...Nbd7) (33)
      • D15k - 5.c5 Nbd7 (28)
      • D15l - 5.a4 (not 5...e6) (3)
      • D15o - 4...dxc4 - Accepted (10)
      • D15t - 5.e4 (not 5...b5) (0)
      • D16a - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 - Slav Defense: Alapin Variation (101)
        • 5...Bg4 6.Ne5 Bh5 (13)
          • D16n - 6...Bh5 (not 7.f3, 7.g3, 7.h3) (0)
          • D16o - 7.h3 (2)
          • D16p - 7.g3 (5)
          • D16q - 7.f3 (not 7...Nfd7) (1)
          • D16r - 7.f3 Nfd7 (3)
          • D16s - 7.f3 Nfd7 8.Nxc4 e5 9.Ne4 (2)
        • 5...Na6 6.e4 Bg4 (8)
          • D16j - (not 7.Bxc4) (4)
          • D16k - 7.Bxc4 e6 (4)
      • D16b - 5...Nd5 (0)
      • D16c - 5...e6 - Soultanbeieff Variation (69)
      • D16d - 5...a5 (3)
      • D16e - 5...Na6 (not 6.Ne5, 6.e3, 6.e4) (0)
      • D16f - 5...Na6 6.Ne5 (0)
      • D16g - 5...Na6 6.e3 (not 6...Bg4) (0)
      • D16h - 5...Na6 6.e3 Bg4 (5)
      • D16i - 5...Na6 6.e4 (not 6...Bg4) (0)
      • D16l - 5...Bg4 (not 6.Ne5) (1)
      • D16m - 5...Bg4 6.Ne5 (not 6...Bh5) (0)
      • D17a - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 - Slav Defense: Czech Variation (208)
        • 6.Ne5 e6 — Main Line (64)
          • D17k - 7.f3 (not 7...Bb4, 7...c5) (3)
          • D17l - 7.f3 c5 (18)
          • D17m - 7...Bb4 (not 8.Bg5, 8.Nxc4, 8.e4) (0)
          • D17m - 7.f3 Bb4 8.Bg5 (8)
          • D17n - 7.f3 Bb4 8.Nxc4 (9)
          • D17o - 7...Bb4 8.e4 (not 8...Bxe4) (1)
          • D17p - 7.f3 Bb4 8.e4 Bxe4 (1)
          • D17q - 7.f3 Bb4 8.e4 Bxe4 9.fxe4 Nxe4 10.Bd2 Qxd4 11.Nxe4 Qxe4+ 12.Qe2 Bxd2+ 13.Kxd2 — Main Line (5)
          • D17r - 7...Bb4 8.e4 Bxe4 9.fxe4 Nxe4 10.Bd2 Qxd4 11.Nxe4 Qxe4+ 12.Qe2 Bxd2+ 13.Kxd2 Qd5+ 14.Kc2 Na6 15.Nxc4 (not 15...O-O, 15...O-O-O) (5)
          • D17s - 7.f3 Bb4 8.e4 Bxe4 9.fxe4 Nxe4 10.Bd2 Qxd4 11.Nxe4 Qxe4+ 12.Qe2 Bxd2+ 13.Kxd2 Qd5+ 14.Kc2 Na6 15.Nxc4 O-O — Main Line (8)
          • D17t - 7.f3 Bb4 8.e4 Bxe4 9.fxe4 Nxe4 10.Bd2 Qxd4 11.Nxe4 Qxe4+ 12.Qe2 Bxd2+ 13.Kxd2 Qd5+ 14.Kc2 Na6 15.Nxc4 O-O-O — Main Line (6)
        • 6.Ne5 Na6 (8)
          • D17g - 6...Na6 (not 7.f3) (0)
          • D17g - 7.f3 (8)
        • 6.Ne5 Nbd7 — Main Line (107)
          • D17j - 7.Nxc4 Qc7 8.g3 e5 9.dxe5 Nxe5 10.Bf4 Nfd7 11.Bg2 f6 — Main Line (12)
        • 6.Nh4 Bc8 (5)
          • D17e - 6...Bc8 (not 7.e3) (0)
          • D17e - 7.e3 (5)
        • 6.Nh4 e6 (3)
          • D17c - (not 7.Nxf5) (0)
          • D17d - 7.Nxf5 exf5 8.e3 (3)
      • D17b - 6.Nh4 - 6.Nh4 (11)
      • D17f - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 - Slav Defense: Czech Variation, Krause Attack (9)
      • D17h - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 - Slav Defense: Czech Variation, Krause Attack (101)
        • D17 - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 - Slav Defense: Czech Variation, Krause Attack (43)
          • D17i - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 - Slav Defense: Czech Variation, Carlsbad Variation (39)
            • 9.dxe5 Nxe5 10.Bf4 Nfd7 11.Bg2 g5 (1)
      • D17k - 6...e6 - 6.Ne5 e6 (1)
      • D18a - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 - Slav Defense: Czech Variation, Classical System (82)
        • 6...e6 7.Bxc4 Bb4 (75)
          • D18d - (not 8.O-O) (4)
          • D18f - 8.O-O Nbd7 (not 9.Nh4, 9.Qb3, 9.Qe2) (0)
          • D18g - 8.O-O Nbd7 9.Nh4 (not 9...Bg6) (3)
          • D18h - 8.O-O Nbd7 9.Nh4 Bg6 (11)
          • D18i - 8.O-O Nbd7 9.Qb3 (not 9...a5) (0)
          • D18j - 8.O-O Nbd7 9.Qb3 a5 (5)
          • D18k - 8.O-O Nbd7 9.Qe2 (not 9...Bg6) (18)
          • D18l - 8.O-O Nbd7 9.Qe2 Bg6 (not 10.e4) (2)
          • D18m - 8.O-O Nbd7 9.Qe2 Bg6 10.e4 (6)
          • D18n - 8.O-O O-O (not 9.Nh4, 9.Qb3) (0)
          • D18o - 8.O-O O-O 9.Qb3 (1)
          • D18p - 8.O-O O-O 9.Nh4 (not 9...Bg4, 9...Bg6, 9...Nbd7) (0)
          • D18p - 8.O-O O-O 9.Nh4 Bg6 (1)
          • D18q - 8.O-O O-O 9.Nh4 Bg4 (2)
          • D18r - 8.O-O O-O 9.Nh4 Nbd7 (not 10.Nxf5) (10)
          • D18s - 8.O-O O-O 9.Nh4 Nbd7 10.Nxf5 (not 10...exf5) (0)
          • D18s - 8.O-O O-O 9.Nh4 Nbd7 10.Nxf5 exf5 (not 11.Qc2) (2)
          • D18t - 8.O-O O-O 9.Nh4 Nbd7 10.Nxf5 exf5 11.Qc2 (10)
      • D18b - 6...Na6 (0)
      • D18c - 6...e6 (not 7.Bxc4) (7)
      • D18e - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O - Slav Defense: Czech Variation, Dutch Variation (59)
        • 8...O-O 9.Qe2 Bg6 (7)
          • D19c - 9...Bg6 (not 10.Ne5, 10.Rd1) (0)
          • D19d - 10.Rd1 (not 10...Nbd7) (0)
          • D19d - 10.Rd1 Nbd7 (4)
          • D19e - 10.Ne5 (not 10...Nbd7) (0)
          • D19e - 10.Ne5 Nbd7 (1)
          • D19f - 10.Ne5 Nbd7 11.Nxg6 hxg6 12.Rd1 (2)
        • 8...O-O 9.Qe2 Nbd7 (45)
          • D19h - 9...Nbd7 (not 10.e4) (2)
          • D19i - 10.e4 (not 10...Bg4, 10...Bg6) (0)
          • D19i - 10.e4 Bg4 (1)
          • D19j - 10.e4 Bg6 (not 11.Bd3) (1)
          • D19k - 10.e4 Bg6 11.Bd3 (not 11...Bh5, 11...Re8, 11...h6) (1)
          • D19l - 10.e4 Bg6 11.Bd3 h6 (11)
          • D19m - 10.e4 Bg6 11.Bd3 Re8 (1)
          • D19n - 10.e4 Bg6 11.Bd3 Bh5 (not 12.e5) (3)
          • D19o - 10.e4 Bg6 11.Bd3 Bh5 12.e5 (25)
        • 8...O-O 9.Qe2 Ne4 (5)
          • D19g - 10.g4 (5)
          • D19g - 9...Ne4 (not 10.g4) (0)
      • D19a - 9.Qe2 (not 9...Bg4) (0)
      • D19b - 8...O-O 9.Qe2 Bg4 (1)
    • D20-D29 1. d4 d5 2. c4 dxc4 Queen's gambit accepted (1009)
      • 5.e4 (7)
      • D20a - 1. d4 d5 2. c4 dxc4 - Queen's Gambit Accepted (264)
        • 3.e3 c5 (3)
          • D20c - 3...c5 (not 4.Bxc4) (0)
          • D20c - 4.Bxc4 (not 4...cxd4) (0)
          • D20c - 4.Bxc4 cxd4 5.exd4 (3)
        • 3.e3 e5 (26)
          • D20e - (not 4.Bxc4) (0)
          • D20e - 4.Bxc4 exd4 5.exd4 (not 5...Bb4+, 5...Nf6) (15)
          • D20f - 4.Bxc4 exd4 5.exd4 Bb4+ (not 6.Nc3) (0)
          • D20f - 4.Bxc4 exd4 5.exd4 Bb4+ 6.Nc3 Nf6 (0)
          • D20g - 4.Bxc4 exd4 5.exd4 Nf6 (11)
        • 3.e3 e6 (2)
          • D20d - (not 4.Bxc4) (0)
          • D20d - 4.Bxc4 Nf6 (2)
        • 3.e4 c5 (23)
          • D20s - 3...c5 (not 4.Nf3, 4.d5) (0)
          • D20s - 4.Nf3 (7)
          • D20t - 4.d5 (7)
          • D20u - 4.d5 Nf6 5.Nc3 b5 (9)
        • 3.e4 e5 (90)
          • D20v - (not 4.Nf3) (31)
          • D20w - 4.Nf3 Bb4+ (35)
          • D20y - 4.Nf3 exd4 5.Bxc4 Nc6 (24)
        • 3.e4 Nc6 (14)
          • D20m - 3...Nc6 (not 4.Be3, 4.Nf3) (0)
          • D20m - 4.Nf3 (8)
          • D20n - 4.Be3 (6)
        • 3.e4 Nf6 (74)
          • D20o - 3...Nf6 (not 4.Nc3, 4.e5) (0)
          • D20o - 4.e5 (not 4...Nd5) (0)
          • D20o - 4.e5 Nd5 (10)
          • D20o - 4.Nc3 (0)
          • D20p - 4.e5 Nd5 5.Bxc4 Nb6 (not 6.Bb3, 6.Bd3) (0)
          • D20p - 4.e5 Nd5 5.Bxc4 Nb6 6.Bd3 (not 6...Nc6) (0)
          • D20p - 4.e5 Nd5 5.Bxc4 Nb6 6.Bd3 Nc6 (41)
          • D20q - 4.e5 Nd5 5.Bxc4 Nb6 6.Bb3 (not 6...Nc6) (0)
          • D20q - 4.e5 Nd5 5.Bxc4 Nb6 6.Bb3 Nc6 (not 7.Ne2) (12)
          • D20r - 4.e5 Nd5 5.Bxc4 Nb6 6.Bb3 Nc6 7.Ne2 (11)
        • 3.Nc3 a6 (1)
          • D20k - 3...a6 (not 4.a4) (0)
          • D20k - 4.a4 (1)
        • 3.Nc3 e6 (2)
          • D20j - 3...e6 (not 4.e4) (0)
          • D20j - 4.e4 (2)
      • D20a - 3.Qa4+ (0)
      • D20b - 3.e3 (not 3...Nf6) (3)
      • D20h - 3.e3 Nf6 (0)
      • D20i - 3.Nc3 (not 3...Nf6, 3...c5, 3...e5) (1)
      • D20i - 3.Nc3 c5 (0)
      • D20i - 3.Nc3 e5 (0)
      • D20i - 3.Nc3 Nf6 (2)
      • D20l - 3.e4 (not 3...f5) (2)
      • D20l - 3.e4 f5 (15)
      • D21a - 1. d4 d5 2. c4 dxc4 3. Nf3 - Queen's Gambit Accepted: Normal Variation (28)
        • 3...c5 4.d5 e6 (5)
          • D21m - 4...e6 (not 5.Nc3, 5.e4) (0)
          • D21m - 5.e4 (0)
          • D21n - 5.Nc3 (not 5...exd5) (0)
          • D21o - 5.Nc3 exd5 (0)
          • D21p - 5.Nc3 exd5 6.Qxd5 Qxd5 7.Nxd5 (not 7...Bd6) (0)
          • D21q - 5.Nc3 exd5 6.Qxd5 Qxd5 7.Nxd5 Bd6 (not 8.Nd2) (0)
          • D21r - 5.Nc3 exd5 6.Qxd5 Qxd5 7.Nxd5 Bd6 8.Nd2 (not 8...Ne7) (1)
          • D21s - 5.Nc3 exd5 6.Qxd5 Qxd5 7.Nxd5 Bd6 8.Nd2 Ne7 (4)
        • 3...c5 4.e3 cxd4 (1)
          • D21j - 4...cxd4 (not 5.Bxc4) (0)
          • D21k - 5.Bxc4 (1)
      • D21a - 3...b5 (0)
      • D21b - 3...Nd7 (0)
      • D21c - 3...Bg4 (1)
      • D21d - 3...e6 (not 4.Qa4+, 4.e3, 4.e4) (1)
      • D21e - 3...e6 4.Qa4+ (4)
      • D21f - 3...e6 4.e4 (5)
      • D21g - 3...e6 4.e3 (not 4...c5) (0)
      • D21g - 3...e6 4.e3 c5 (2)
      • D21h - 3...c5 (not 4.Nc3, 4.d5, 4.e3) (1)
      • D21i - 3...c5 4.Nc3 (2)
      • D21j - 3...c5 4.e3 (not 4...cxd4) (0)
      • D21l - 3...c5 4.d5 (not 4...e6) (0)
      • D21t - 1. d4 d5 2. c4 dxc4 3. Nf3 a6 - Queen's Gambit Accepted (20)
        • 4.e3 Bg4 (8)
          • D22g - (not 5.Bxc4) (0)
          • D22h - 5.Bxc4 e6 (not 6.Nc3, 6.Qb3, 6.d5, 6.h3) (4)
          • D22i - 5.Bxc4 e6 6.d5 (2)
          • D22j - 5.Bxc4 e6 6.Qb3 (0)
          • D22k - 5.Bxc4 e6 6.Nc3 (1)
          • D22l - 5.Bxc4 e6 6.h3 (1)
        • 4.e3 e6 (3)
          • D22c - 4...e6 (not 5.Bxc4) (0)
          • D22d - 5.Bxc4 (not 5...c5) (0)
          • D22e - 5.Bxc4 c5 (not 6.Qe2) (3)
          • D22f - 5.Bxc4 c5 6.Qe2 (0)
      • D21u - 3...a6 4.e4 (3)
      • D21v - 3...a6 4.a4 (3)
      • D22a - 4.e3 (not 4...b5) (0)
      • D22b - 4.e3 b5 (9)
      • D23a - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 - Queen's Gambit Accepted (90)
        • 4.Qa4+ c6 — Main Line (72)
          • D23i - 4...c6 (not 5.Qxc4) (0)
          • D23i - 5.Qxc4 (not 5...Bf5) (29)
          • D23j - 5.Qxc4 Bf5 (not 6.Nc3, 6.g3) (0)
          • D23k - 5.Qxc4 Bf5 6.Nc3 (0)
          • D23l - 5.Qxc4 Bf5 6.g3 (not 6...e6) (1)
          • D23m - 5.Qxc4 Bf5 6.g3 e6 (not 7.Bg2) (0)
          • D23m - 5.Qxc4 Bf5 6.g3 e6 7.Bg2 (not 7...Nbd7) (10)
          • D23n - 5.Qxc4 Bf5 6.g3 e6 7.Bg2 Nbd7 (17)
          • D23o - 5.Qxc4 Bf5 6.g3 e6 7.Bg2 Nbd7 8.O-O Be7 9.Nc3 (not 9...O-O) (1)
          • D23p - 5.Qxc4 Bf5 6.g3 e6 7.Bg2 Nbd7 8.O-O Be7 9.Nc3 O-O (not 10.Bg5, 10.e3) (9)
          • D23q - 5.Qxc4 Bf5 6.g3 e6 7.Bg2 Nbd7 8.O-O Be7 9.Nc3 O-O 10.Bg5 — Main Line (1)
          • D23r - 5.Qxc4 Bf5 6.g3 e6 7.Bg2 Nbd7 8.O-O Be7 9.Nc3 O-O 10.e3 (not 10...Ne4) (0)
          • D23s - 5.Qxc4 Bf5 6.g3 e6 7.Bg2 Nbd7 8.O-O Be7 9.Nc3 O-O 10.e3 Ne4 (not 11.Qe2) (1)
          • D23t - 5.Qxc4 Bf5 6.g3 e6 7.Bg2 Nbd7 8.O-O Be7 9.Nc3 O-O 10.e3 Ne4 11.Qe2 — Main Line (3)
        • 4.Qa4+ Nbd7 (5)
          • D23f - (not 5.Nc3) (2)
          • D23g - 5.Nc3 e6 (not 6.e4) (0)
          • D23h - 5.Nc3 e6 6.e4 (3)
        • 4.Qa4+ Nc6 (11)
          • D23d - 4...Nc6 (not 5.Nc3) (7)
          • D23e - 5.Nc3 (4)
      • D23b - 4.g3 (0)
      • D23c - 4.Qa4+ (not 4...Nbd7, 4...Nc6, 4...c6) (2)
      • D24a - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 - Queen's Gambit Accepted: Showalter Variation (103)
        • 4...a6 5.a4 Nc6 (1)
          • D24j - 5...Nc6 (not 6.e4) (0)
          • D24j - 6.e4 (1)
        • 4...a6 5.e4 b5 (8)
          • D24l - 7.a4 (not 7...Bb7, 7...Nb4, 7...Nxc3, 7...c6, 7...e6) (0)
          • D24m - 6.e5 Nd5 7.a4 e6 (6)
          • D24n - 6.e5 Nd5 7.a4 c6 (0)
          • D24o - 6.e5 Nd5 7.a4 Bb7 (0)
          • D24p - 6.e5 Nd5 7.a4 Nb4 (1)
          • D24q - 6.e5 Nd5 7.a4 Nxc3 (0)
          • D24r - 6.e5 Nd5 7.a4 Nxc3 8.bxc3 Bb7 (0)
          • D24s - 6.e5 Nd5 7.a4 Nxc3 8.bxc3 Qd5 (0)
          • D24t - 6.e5 Nd5 7.a4 Nxc3 8.bxc3 Qd5 9.g3 Bb7 (1)
        • 4...c5 5.d5 e6 (4)
          • D24f - 6.e4 (0)
          • D24g - 6...exd5 7.e5 Nfd7 (not 8.Bg5) (0)
          • D24g - 6...exd5 7.e5 Nfd7 8.Bg5 (not 8...Be7) (0)
          • D24g - 6.e4 exd5 7.e5 Nfd7 8.Bg5 Be7 (4)
      • D24a - 4...Nd5 (1)
      • D24b - 4...e6 5.Bg5 (62)
      • D24b - 5.e4 (1)
      • D24d - 4...c5 (not 5.d5) (0)
      • D24e - 4...c5 5.d5 (not 5...e6) (0)
      • D24h - 4...a6 (not 5.a4, 5.e4) (0)
      • D24i - 4...a6 5.a4 (not 5...Nc6) (0)
      • D24k - 4...a6 5.e4 (not 5...b5) (2)
      • D25a - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 - Queen's Gambit Accepted: Normal Variation (51)
        • 4...Bg4 5.Bxc4 e6 — Janowski (29)
          • D25h - 5...e6 (not 6.Nc3, 6.O-O, 6.Qb3, 6.h3) (0)
          • D25i - 6.Qb3 (0)
          • D25j - 6.O-O (4)
          • D25k - 6.Nc3 (5)
          • D25l - 6.h3 (4)
          • D25m - 6.h3 Bh5 7.Nc3 (not 7...Nbd7, 7...a6) (2)
          • D25n - 6.h3 Bh5 7.Nc3 a6 (not 8.g4) (1)
          • D25o - 6.h3 Bh5 7.Nc3 a6 8.g4 (5)
          • D25p - 6.h3 Bh5 7.Nc3 Nbd7 (not 8.O-O) (0)
          • D25q - 6.h3 Bh5 7.Nc3 Nbd7 8.O-O (not 8...Bd6) (1)
          • D25r - 6.h3 Bh5 7.Nc3 Nbd7 8.O-O Bd6 (not 9.Be2, 9.e4) (0)
          • D25r - 6.h3 Bh5 7.Nc3 Nbd7 8.O-O Bd6 9.Be2 (4)
          • D25s - 6.h3 Bh5 7.Nc3 Nbd7 8.O-O Bd6 9.e4 (3)
        • 4...g6 5.Bxc4 Bg7 (2)
          • D25d - 5...Bg7 (not 6.Nc3, 6.O-O) (0)
          • D25d - 6.Nc3 (0)
          • D25e - 6.O-O (not 6...O-O) (0)
          • D25e - 6.O-O O-O (not 7.Nc3) (0)
          • D25e - 6.O-O O-O 7.Nc3 (2)
      • D25b - 4...c5 (3)
      • D25c - 4...a6 (5)
      • D25d - 4...g6 (not 5.Bxc4) (0)
      • D25f - 4...Be6 (not 5.Nc3) (0)
      • D25f - 4...Be6 5.Nc3 (not 5...c6) (0)
      • D25f - 4...Be6 5.Nc3 c6 (1)
      • D25g - 4...Bg4 (not 5.h3) (0)
      • D25g - 4...Bg4 5.h3 (0)
      • D26a - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 - Queen's Gambit Accepted: Normal Variation, Traditional System (87)
        • 5.Bxc4 a6 (14)
          • D26d - 6.O-O (not 6...b5) (4)
          • D26e - 6.O-O b5 (5)
        • 5.Bxc4 Be7 - Traditional System (1)
        • 5.Bxc4 c5 (57)
          • D26g - 6.dxc5 (2)
          • D26h - 6.Nc3 (not 6...a6) (0)
          • D26i - 6.Nc3 a6 (4)
          • D26j - 6.Qe2 (not 6...a6, 6...cxd4) (0)
          • D26k - 6.Qe2 cxd4 (3)
          • D26l - 6.Qe2 a6 (0)
          • D26m - 6.Qe2 a6 7.dxc5 Bxc5 8.O-O (not 8...Nc6, 8...b5) (4)
          • D26n - 6.Qe2 a6 7.dxc5 Bxc5 8.O-O Nc6 (10)
          • D26o - 6.Qe2 a6 7.dxc5 Bxc5 8.O-O b5 (5)
          • D26s - 6.O-O Nc6 7.Nc3 (12)
          • D26t - 6.O-O Nc6 7.Qe2 (6)
      • D26b - 5.Bxc4 (not 5...a6) (0)
      • D26c - 5.Bxc4 a6 - Traditional System (8)
      • D26f - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 - Queen's Gambit Accepted: Classical Defense (13)
      • D26p - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O - Queen's Gambit Accepted: Classical Defense, Normal Line (12)
        • 6...Be7 - Normal Line (5)
        • 6...Qc7 - Normal Line (1)
      • D26q - 6...cxd4 - Steinitz Variation (10)
      • D26r - 6...Nc6 - 6.O-O Nc6 (6)
      • D27a - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 - Queen's Gambit Accepted: Classical Defense, Main Line (314)
        • 7.a4 Nc6 (64)
          • D27p - 7...Nc6 (not 8.Nc3, 8.Qe2) (5)
          • D27q - 8.Nc3 (not 8...Be7) (2)
          • D27r - 8.Nc3 Be7 (not 9.Qe2) (15)
          • D27s - 8.Nc3 Be7 9.Qe2 (9)
          • D27t - 8.Qe2 (not 8...Qc7, 8...cxd4) (3)
          • D27u - 8.Qe2 Qc7 (11)
          • D27v - 8.Qe2 cxd4 (not 9.Rd1) (0)
          • D27v - 8.Qe2 cxd4 9.Rd1 Be7 10.exd4 O-O 11.Nc3 (not 11...Nd5) (7)
          • D27w - 8.Qe2 cxd4 9.Rd1 Be7 10.exd4 O-O 11.Nc3 Nd5 (12)
        • 7.Bb3 Nc6 (18)
          • D27i - 7...Nc6 (not 8.Nc3) (3)
          • D27j - 8.Nc3 (15)
        • 7.dxc5 Qxd1 (32)
          • D27m - (not 8.Rxd1) (10)
          • D27n - 8.Rxd1 Bxc5 9.Nbd2 (16)
          • D27o - 8.Rxd1 Bxc5 9.b3 (6)
      • D27a - 7.a3 (25)
      • D27b - 7.b3 (30)
      • D27c - 7.Nc3 (18)
      • D27d - 7.Bd3 (not 7...Nbd7) (13)
      • D27e - 7.Bd3 Nbd7 (8)
      • D27f - 7.Bb3 (not 7...b5, 7...cxd4) (11)
      • D27g - 7.Bb3 b5 (8)
      • D27h - 7.Bb3 cxd4 (20)
      • D27k - 7.e4 (6)
      • D27l - 7.dxc5 (not 7...Qxd1) (55)
      • D27p - 7.a4 (not 7...Nc6) (0)
      • D28a - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 - Queen's Gambit Accepted: Classical Defense, Alekhine System (18)
        • 7...b5 8.Bb3 Nc6 (6)
          • D28i - 8...Nc6 (not 9.Nc3, 9.Rd1) (0)
          • D28j - 9.Rd1 (not 9...c4) (0)
          • D28k - 9.Rd1 c4 (0)
          • D28l - 9.Nc3 (not 9...Bb7, 9...Be7) (1)
          • D28m - 9.Nc3 Bb7 (5)
          • D28n - 9.Nc3 Be7 (0)
        • 7...b5 8.Bd3 cxd4 (4)
          • D28f - 8...cxd4 (not 9.exd4) (1)
          • D28g - 9.exd4 (3)
      • D28b - 7...cxd4 (2)
      • D28c - 7...Nc6 (4)
      • D28d - 7...b5 (not 8.Bb3, 8.Bd3) (0)
      • D28e - 7...b5 8.Bd3 (not 8...cxd4) (1)
      • D28h - 7...b5 8.Bb3 (not 8...Nc6) (0)
      • D29 - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 - Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line (26)
        • 9.Rd1 Nbd7 (20)
          • D29g - 10.e4 (1)
          • D29g - 9...Nbd7 (not 10.Nc3, 10.a4, 10.e4) (0)
          • D29h - 10.a4 (not 10...b4) (1)
          • D29i - 10.a4 b4 (0)
          • D29j - 10.Nc3 (not 10...Bd6, 10...Qb6, 10...Qb8, 10...Qc7) (1)
          • D29k - 10.Nc3 Bd6 (0)
          • D29l - 10.Nc3 Qc7 (2)
          • D29m - 10.Nc3 Qb8 (6)
          • D29n - 10.Nc3 Qb6 (9)
        • D29b - 9.Nc3 (0)
        • D29c - 9.a4 (not 9...Nbd7, 9...b4) (0)
        • D29d - 9.a4 b4 (1)
        • D29e - 9.a4 Nbd7 (5)
        • D29f - 9.Rd1 (not 9...Nbd7) (0)
    • D30-D39 1. d4 d5 2. c4 e6 Queen's gambit declined (2802)
      • 3.Nf3 c6 4.Nc3 dxc4 5.a4 Bb4 (1)
      • D24b - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 - Queen's Gambit Declined: Three Knights, Vienna Variation (3)
      • D24c - 5.e3 (27)
      • D30a - 1. d4 d5 2. c4 e6 - Queen's Gambit Declined (343)
        • 3.c4 dxe4 — Main Line (0)
          • D30b - 4...Nf6 5.f3 (not 5...Bb4, 5...c5, 5...exf3) (0)
          • D30b - 4.Nc3 f5 (0)
          • D30b - 4.Nc3 Nf6 5.a3 (0)
          • D30b - 4.Nc3 Nf6 5.Be3 (0)
          • D30b - 4.Nc3 Nf6 5.f3 Bb4 — Main Line (0)
          • D30b - 4.Nc3 Nf6 5.f3 c5 (0)
          • D30b - 4.Nc3 Nf6 5.f3 exf3 — Exchange (0)
        • 3.cxd5 exd5 (0)
          • D30d - 3...exd5 (not 4.Nc3) (0)
          • D30d - 4.Nc3 (0)
        • 3.Nf3 c5 — Main Line (29)
          • D30h - 3...c5 (not 4.cxd5, 4.e3) (0)
          • D30h - 4.cxd5 (not 4...exd5) (0)
          • D30h - 4.cxd5 exd5 (not 5.g3) (17)
          • D30h - 4.e3 (not 4...Nf6) (0)
          • D30h - 4.e3 Nf6 (0)
          • D30i - 4.cxd5 exd5 5.g3 (not 5...Nc6, 5...Nf6) (0)
          • D30i - 4.cxd5 exd5 5.g3 Nc6 (not 6.Bg2) (0)
          • D30i - 4.cxd5 exd5 5.g3 Nc6 6.Bg2 (not 6...Nf6) (0)
          • D30i - 4.cxd5 exd5 5.g3 Nc6 6.Bg2 Nf6 (not 7.O-O) (0)
          • D30i - 4.cxd5 exd5 5.g3 Nc6 6.Bg2 Nf6 7.O-O (not 7...Be7) (0)
          • D30i - 4.cxd5 exd5 5.g3 Nc6 6.Bg2 Nf6 7.O-O Be7 — Main Line (12)
          • D30i - 4.cxd5 exd5 5.g3 Nf6 (not 6.Bg2) (0)
          • D30i - 4.cxd5 exd5 5.g3 Nf6 6.Bg2 (0)
        • 3.Nf3 c6 (84)
          • D30j - 3...c6 (not 4.Nbd2, 4.Qc2, 4.e3) (16)
          • D30k - 4.e3 (21)
          • D30l - 4.Nbd2 (14)
          • D30m - 4.Qc2 (not 4...Nf6) (12)
          • D30n - 4.Qc2 Nf6 (not 5.Bg5, 5.g3) (6)
          • D30o - 4.Qc2 Nf6 5.Bg5 (8)
          • D30p - 4.Qc2 Nf6 5.g3 (7)
        • 3.Nf3 Nf6 — Capablanca (178)
          • D30r - 4.e3 (not 4...c6) (63)
          • D30s - 4.e3 c6 (not 5.Nbd2) (31)
          • D30t - 4.e3 c6 5.Nbd2 (not 5...Nbd7, 5...g6) (0)
          • D30t - 4.e3 c6 5.Nbd2 g6 (0)
          • D30t - 4.e3 c6 5.Nbd2 Nbd7 (not 6.Bd3) (0)
          • D30t - 4.e3 c6 5.Nbd2 Ne4 6.Bd3 f5 (8)
          • D30u - 4.e3 c6 5.Nbd2 Nbd7 6.Bd3 (not 6...c5) (0)
          • D30u - 4.e3 c6 5.Nbd2 Nbd7 6.Bd3 c5 (11)
          • D30v - 4.Bg5 (not 4...Bb4+, 4...Nbd7, 4...dxc4) (14)
          • D30v - 4.Bg5 Bb4+ — Vienna (0)
          • D30v - 4.Bg5 dxc4 (0)
          • D30v - 4.Bg5 Nbd7 (not 5.e3) (0)
          • D30v - 4.Bg5 Nbd7 5.e3 c6 6.Nbd2 (29)
      • D30a - 3.e3 (0)
      • D30b - 3.e4 (not 3...dxe4) (0)
      • D30b - 3.e4 dxe4 (0)
      • D30c - 3.g3 (4)
      • D30d - 3.cxd5 (2)
      • D30e - 3.Bf4 (0)
      • D30f - 1. d4 d5 2. c4 e6 3. Nf3 - Queen's Gambit Declined (69)
        • 3...a6 (1)
        • D30 - 1. d4 d5 2. c4 e6 3. Nf3 Nf6 - Queen's Gambit Declined (36)
          • 4.Bg5 Be7 5.e3 h6 - Traditional Variation (1)
          • 4.cxd5 (2)
          • 4.Nc3 Be7 5.Bg5 - Three Knights Variation (4)
          • 4.Nc3 Be7 5.g3 - Three Knights Variation (0)
          • D30w - 4.Bg5 h6 - Capablanca-Duras Variation (18)
          • D37e - 4.Nc3 Be7 5.e3 (0)
          • E00o - 4.g3 (11)
      • D30g - 3...Nd7 (6)
      • D31a - 1. d4 d5 2. c4 e6 3. Nc3 - Queen's Gambit Declined: Queen's Knight Variation (314)
        • 3...Bb4 4.cxd5 exd5 5.Bf4 (2)
        • 3...Bb4 4.Nf3 (1)
        • D31 - 1. d4 d5 2. c4 e6 3. Nc3 Be7 - Queen's Gambit Declined: Charousek Variation (42)
          • 4.Nf3 Nf6 5.g3 - Charousek Variation (2)
          • D31e - 1. c4 e6 2. Nc3 d5 3. d4 Be7 4. cxd5 exd5 5. Bf4 - Queen's Gambit Declined: Charousek Variation (37)
            • 5...c6 6.e3 - Charousek Variation (7)
            • 5...c6 6.h3 - Charousek Variation (1)
            • 5...Nf6 6.e3 - Charousek Variation (6)
          • D53c - 4.Nf3 Nf6 5.Bg5 - Charousek Variation (1)
        • D31 – 1. d4 d5 2. c4 e6 3. Nc3 4..... – Queen’s Gambit Declined: Queen’s Knight Variation (6)
      • D31a - 3...b6 (not 4.a3, 4.Nf3, 4.Bf4, 4.cxd5, 4.e3, 4.e4) (0)
      • D31a - 3...Nc6 (not 4.a3, 4.Nf3, 4.Bf4, 4.cxd5, 4.e3, 4.e4) (6)
      • D31b - 3...a6 - Janowski Variation (34)
      • D31c - 3...Bb4 (not 4.a3) (0)
      • D31c - 4.a3 (27)
      • D31d - 1. d4 d5 2. c4 e6 3. Nc3 Be7 - Queen's Gambit Declined: Charousek Variation (299)
        • 4.cxd5 exd5 — Exchange (116)
          • D31e - (not 5.Bf4) (0)
          • D31f - 5.Bf4 c6 (40)
          • D31g - 3...Be7 4.cxd5 exd5 5.Bf4 c6 6.e3 Bf5 (not 7.g4) (21)
          • D31h - 5.Bf4 c6 6.e3 Bf5 7.g4 (23)
          • D31j - 3...c6 4.cxd5 exd5 (not 5.Nf3) (7)
          • D31k - 3...c6 4.cxd5 exd5 5.Nf3 (not 5...Bf5) (0)
          • D31l - 5.Nf3 Bf5 (2)
        • 4.e4 dxe4 (29)
          • D31w - 4...dxe4 (not 5.Nxe4, 5.f3) (0)
          • D31w - 5.f3 (0)
          • D31w - 5.Nxe4 (not 5...Nf6) (6)
          • D31w - 5.Nxe4 Nf6 (7)
          • D31y - 5.Nxe4 Bb4+ 6.Bd2 Qxd4 7.Bxb4 Qxe4+ 8.Be2 (not 8...Na6) (2)
          • D31z - 5.Nxe4 Bb4+ 6.Bd2 Qxd4 7.Bxb4 Qxe4+ 8.Be2 Na6 (14)
        • 4.Nf3 dxc4 — Main Line (18)
          • D31q - 4...dxc4 (not 5.a4) (4)
          • D31r - 5.a4 (5)
          • D31s - 5.a4 Bb4 6.e3 b5 (not 7.Bd2) (0)
          • D31s - 5.a4 Bb4 6.e3 b5 7.Bd2 Qb6 (0)
          • D31s - 5.a4 Bb4 6.e3 b5 7.Bd2 Qe7 (2)
          • D31t - 5.a4 Bb4 6.e3 b5 7.Bd2 a5 (0)
          • D31u - 5.a4 Bb4 6.e3 b5 7.Bd2 a5 8.axb5 Bxc3 9.Bxc3 cxb5 10.b3 Bb7 — Main Line (2)
          • D31v - 5.a4 Bb4 6.e3 b5 7.Bd2 a5 8.axb5 Bxc3 9.Bxc3 cxb5 10.b3 Bb7 11.bxc4 b4 12.Bb2 Nf6 13.Bd3 Nbd7 14.O-O O-O — Main Line (5)
      • D31d - 4.Bf4 (0)
      • D31d - 4.Nf3 (12)
      • D31e - 4.cxd5 (not 4...exd5) (0)
      • D31i - 3...c6 - Semi-Slav (5)
      • D31n - 3...c6 4.e3 (not 4...Nf6) (14)
      • D31o - 4.e3 Nf6 (23)
      • D31p - 4.Nf3 (not 4...dxc4) (2)
      • D31w - 3...c6 4.e4 (not 4...Bb4) (0)
      • D31w - 4.e4 Bb4 (0)
      • D32 - 1. d4 d5 2. c4 e6 3. Nc3 c5 - Tarrasch Defense (113)
        • 4.cxd5 cxd4 — Main Line (16)
          • D32d - 5.Qxd4 (3)
          • D32e - 5.Qxd4 Nc6 6.Qd1 exd5 7.e3 (1)
          • D32f - 5.Qa4+ (not 5...Bd7) (0)
          • D32f - 5.Qa4+ Bd7 6.Qxd4 exd5 7.Qxd5 Nc6 (not 8.Bg5, 8.Nf3) (9)
          • D32g - 5.Qa4+ Bd7 6.Qxd4 exd5 7.Qxd5 Nc6 8.Bg5 (0)
          • D32h - 5.Qa4+ Bd7 6.Qxd4 exd5 7.Qxd5 Nc6 8.Nf3 (3)
          • D32i - 5.Qa4+ Bd7 6.Qxd4 exd5 7.Qxd5 Nc6 8.Nf3 Nf6 9.Qd1 Bc5 10.e3 Qe7 11.Be2 O-O-O — Main Line (0)
        • 4.cxd5 exd5 (74)
          • D32j - 4...exd5 (not 5.dxc5, 5.g3) (0)
          • D32j - 5.g3 (0)
          • D32k - 5.dxc5 (not 5...d4) (0)
          • D32k - 5.dxc5 d4 6.Na4 b5 (2)
          • D32l - 5.e4 dxe4 (not 6.Bc4, 6.d5) (0)
          • D32l - 5.e4 dxe4 6.Bc4 (0)
          • D32l - 5.e4 dxe4 6.d5 (0)
          • D32n - 5.Nf3 Nc6 (not 6.Bf4, 6.Bg5, 6.e3) (3)
          • D32o - 5.Nf3 Nc6 6.Bf4 (not 6...Nf6) (0)
          • D32o - 5.Nf3 Nc6 6.Bf4 Nf6 (3)
          • D32p - 5.Nf3 Nc6 6.Bg5 (not 6...Be7) (0)
          • D32q - 5.Nf3 Nc6 6.Bg5 Be7 (2)
          • D32r - 5.Nf3 Nc6 6.e3 (not 6...Nf6) (0)
          • D32r - 5.Nf3 Nc6 6.e3 Nf6 (not 7.Bb5, 7.Be2) (0)
          • D32s - 5.Nf3 Nc6 6.e3 Nf6 7.Bb5 (40)
          • D32t - 5.Nf3 Nc6 6.e3 Nf6 7.Be2 (not 7...Be7, 7...cxd4) (7)
          • D32u - 5.Nf3 Nc6 6.e3 Nf6 7.Be2 Be7 (not 8.dxc5) (0)
          • D32u - 5.Nf3 Nc6 6.e3 Nf6 7.Be2 Be7 8.dxc5 Bxc5 (2)
          • D32v - 5.Nf3 Nc6 6.e3 Nf6 7.Be2 cxd4 (not 8.Nxd4) (0)
          • D32v - 5.Nf3 Nc6 6.e3 Nf6 7.Be2 cxd4 8.Nxd4 Bd6 (not 9.O-O) (0)
          • D32v - 5.Nf3 Nc6 6.e3 Nf6 7.Be2 cxd4 8.Nxd4 Bd6 9.O-O (not 9...O-O) (3)
          • D32w - 5.Nf3 Nc6 6.e3 Nf6 7.Be2 cxd4 8.Nxd4 Bd6 9.O-O O-O (7)
        • 4.dxc5 (1)
        • 4.e3 Nf6 5.cxd5 (1)
        • D32a - 3...c5 (not 4.Nf3, 4.cxd5, 4.e3) (8)
        • D32a - 4.e3 (1)
        • D32b - 4.Nf3 (not 4...cxd4) (0)
        • D32c - 4.Nf3 cxd4 5.Nxd4 e5 (0)
        • D32d - 3...c5 4.cxd5 (not 4...cxd4) (0)
        • D32d - 4.cxd5 cxd4 - von Hennig-Schara Gambit (2)
        • D32l - 4.cxd5 exd5 5.e4 - Marshall Gambit (1)
        • D32m - 4.cxd5 exd5 5.Nf3 (12)
        • D40f - 4.e3 Nf6 5.Nf3 Nc6 - 5.e3 Nc6 (6)
      • D33a - 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 - Tarrasch Defense: Rubinstein System (24)
        • 6...Nf6 7.a3 (1)
        • 6...Nf6 7.Be3 (2)
        • D33 - 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 cxd4 8. Nxd4 Bc5 - Tarrasch Defense: Dubov Tarrasch (21)
          • 9.O-O O-O (2)
            • D33p - 9...O-O (not 10.Be3) (0)
            • D33q - 10.Be3 (2)
          • D33f - 6...c4 7.Bg2 Bb4 8.O-O Nge7 (not 9.Bd2, 9.Ne5, 9.a3, 9.e4) (0)
          • D33g - 9.a3 (0)
          • D33h - 9.Bd2 (1)
          • D33i - 9.Ne5 (0)
          • D33j - 6...c4 7.Bg2 Bb4 8.O-O Nge7 9.e4 (not 9...dxe4) (0)
          • D33k - 9.e4 dxe4 (0)
          • D33p - 6...Nf6 7.Bg2 cxd4 8.Nxd4 Be7 (not 9.O-O) (0)
          • D33p - 9.O-O (not 9...O-O) (0)
      • D34a - 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 - Tarrasch Defense: Prague Variation, Main Line (71)
        • 8.O-O O-O — Main Line (68)
          • D34c - 8...O-O (not 9.Be3, 9.Bf4, 9.Bg5, 9.b3, 9.dxc5) (1)
          • D34d - 9.b3 (not 9...Ne4) (2)
          • D34e - 9.b3 Ne4 (4)
          • D34f - 9.Bf4 (1)
          • D34g - 9.Be3 (1)
          • D34h - 9.dxc5 (not 9...Bxc5, 9...d4) (0)
          • D34h - 9.dxc5 d4 (0)
          • D34i - 9.dxc5 Bxc5 (not 10.Bg5) (2)
          • D34k - 9.dxc5 Bxc5 10.Bg5 (not 10...Be6, 10...d4) (0)
          • D34k - 9.dxc5 Bxc5 10.Bg5 Be6 (not 11.Bxf6) (0)
          • D34k - 9.dxc5 Bxc5 10.Bg5 Be6 11.Bxf6 (1)
          • D34l - 9.dxc5 Bxc5 10.Bg5 d4 (6)
          • D34m - 9.dxc5 Bxc5 10.Bg5 d4 11.Bxf6 Qxf6 12.Nd5 (2)
          • D34n - 9.dxc5 Bxc5 10.Bg5 d4 11.Bxf6 Qxf6 12.Nd5 Qd8 13.Nd2 Re8 — Main Line (11)
          • D34o - 9.Bg5 (not 9...Be6, 9...c4, 9...cxd4) (0)
          • D34o - 9.Bg5 Be6 (not 10.Rc1) (0)
          • D34o - 9.Bg5 Be6 10.Rc1 b6 (0)
          • D34p - 9.Bg5 c4 (8)
          • D34q - 9.Bg5 c4 10.Ne5 Be6 11.Nxc6 (5)
          • D34r - 9.Bg5 cxd4 (not 10.Nxd4) (0)
          • D34r - 9.Bg5 cxd4 10.Nxd4 (not 10...h6) (2)
          • D34s - 9.Bg5 cxd4 10.Nxd4 h6 (not 11.Be3) (1)
          • D34t - 9.Bg5 cxd4 10.Nxd4 h6 11.Be3 (not 11...Re8) (0)
          • D34u - 9.Bg5 cxd4 10.Nxd4 h6 11.Be3 Re8 (not 12.Qb3, 12.Rc1) (6)
          • D34v - 9.Bg5 cxd4 10.Nxd4 h6 11.Be3 Re8 12.Qb3 (4)
          • D34w - 9.Bg5 cxd4 10.Nxd4 h6 11.Be3 Re8 12.Rc1 (8)
          • D34y - 9.Bg5 cxd4 10.Nxd4 h6 11.Be3 Re8 12.Rc1 Bf8 13.Nxc6 (1)
      • D34a - 8.O-O (not 8...Be6) (1)
      • D34b - 8.O-O Be6 (0)
      • D34j - 8.O-O O-O 9.dxc5 Bxc5 10.Na4 - Reti Variation (3)
      • D34o - 8.O-O O-O 9.Bg5 Be6 10.Rc1 c4 - Bogoljubow Variation (1)
      • D35a - 4.Bf4 (not 4...Nxd5, 4...exd5, 5.Bg5, 5.Nf3) (3)
      • D35a - 4.e3 (not 4...Nxd5, 4...exd5, 5.Bg5, 5.Nf3) (1)
      • D35a - 4.g3 (not 4...Nxd5, 4...exd5, 5.Bg5, 5.Nf3) (0)
      • D35b - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 - Queen's Gambit Declined: Exchange Variation (360)
        • 4...exd5 5.Bg5 Be7 — Exchange (25)
          • D35i - 6.Nf3 (0)
          • D35j - 6.e3 (not 6...Nbd7) (0)
          • D35j - 6.e3 Nbd7 (13)
        • 4...exd5 5.Bg5 c6 — Exchange (128)
          • D35l - 6.Nf3 (7)
          • D35m - 6.e3 (not 6...Nbd7) (66)
          • D35n - 6.e3 Nbd7 (5)
          • D35o - 6.e3 Be7 7.Nf3 (not 7...Bf5) (0)
          • D35p - 6.e3 Be7 7.Nf3 Bf5 (not 8.Bd3) (0)
          • D35q - 6.e3 Be7 7.Nf3 Bf5 8.Bd3 (1)
          • D35r - 6.e3 Be7 7.Bd3 (not 7...Nbd7, 7...Ne4, 7...O-O) (7)
          • D35s - 6.e3 Be7 7.Bd3 Ne4 (1)
          • D35t - 6.e3 Be7 7.Bd3 Nbd7 (not 8.Nf3, 8.Nge2) (0)
          • D35t - 6.e3 Be7 7.Bd3 Nbd7 8.Nge2 (17)
          • D35u - 6.e3 Be7 7.Bd3 Nbd7 8.Nf3 (19)
          • D35v - 6.e3 Be7 7.Bd3 O-O (not 8.Nf3, 8.Nge2) (0)
          • D35v - 6.e3 Be7 7.Bd3 O-O 8.Nf3 (0)
          • D35v - 6.e3 Be7 7.Bd3 O-O 8.Nge2 (5)
        • 4...exd5 5.Bg5 Nbd7 — Exchange (39)
          • D35i - 5...Nbd7 (not 6.Nf3, 6.e3) (0)
          • D35i - 6.e3 (0)
          • D35i - 6.Nf3 (39)
        • 4...exd5 5.Nf3 Be7 — Exchange (20)
          • D35g - (not 6.Bf4) (0)
          • D35h - 6.Bf4 c6 (not 7.Qc2) (0)
          • D35h - 6.Bf4 c6 7.Qc2 (not 7...Nbd7) (0)
          • D35h - 6.Bf4 c6 7.Qc2 Nbd7 (9)
        • 4...exd5 5.Nf3 c6 — Exchange (8)
          • D35d - 5...c6 (not 6.e3) (0)
          • D35d - 6.e3 (8)
        • 4...exd5 5.Nf3 Nbd7 — Exchange (24)
          • D35e - 5...Nbd7 (not 6.e3) (0)
          • D35e - 6.e3 (not 6...c6) (0)
          • D35e - 6.e3 c6 (3)
      • D35b - 4...Nxd5 (37)
      • D35b - 4.cxd5 exd5 (not 5.Bf4, 5.Nf3) (0)
      • D35c - 4...exd5 5.Bf4 - Saemisch Variation (7)
      • D35d - 4...exd5 5.Nf3 (not 5...Be7, 5...Nbd7, 5...c6) (0)
      • D35f - 6.Bf4 - 5.Nf3 Nbd7 6.Bf4 (22)
      • D35g - 4...Be7 5.cxd5 exd5 6.Bf4 - 5.Nf3 Be7 6.Bf4 (15)
      • D35i - 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 Be7 - Queen's Gambit Declined: Exchange Variation, Positional Variation (32)
      • D35i - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 - Queen's Gambit Declined: Exchange Variation, Positional Variation (69)
        • 5...Bb4 - Positional Variation (13)
        • 5...Be6 - Positional Variation (1)
      • D35j - 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 h6 - Queen's Gambit Declined: Exchange Variation, Positional Variation (14)
        • 7.Bh4 Bg4 - Positional Variation (7)
        • 7.Bh4 O-O - Positional Variation (7)
      • D35k - 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O - Queen's Gambit Declined: Exchange Variation, Positional Variation (23)
        • 7.Bd3 h6 - Positional Variation (2)
        • 7.Bd3 Re8 - Positional Variation (9)
      • D35l - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 - Queen's Gambit Declined: Exchange Variation, Positional Variation (23)
        • 6.e3 Bd6 - Positional Variation (2)
        • 6.e3 h6 - Positional Variation (10)
        • D35 - 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 Bf5 - Queen's Gambit Declined: Exchange Variation, Positional Variation (11)
          • 7.Bd3 - Positional Variation (1)
          • 7.f3 - Positional Variation (1)
          • 7.Nge2 - Positional Variation (1)
          • 7.Qb3 - Positional Variation (1)
          • 7.Qf3 - Positional Variation (7)
      • D35o - 6.e3 c6 - Positional Variation (7)
      • D36a - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. Qc2 - Queen's Gambit Declined: Exchange Variation, Reshevsky Variation (198)
        • 6...Be7 7.e3 h6 — Exchange (12)
          • D36g - (not 8.Bh4) (0)
          • D36g - 8.Bh4 O-O (not 9.Bd3) (0)
          • D36g - 8.Bh4 O-O 9.Bd3 Re8 (12)
        • 6...Be7 7.e3 Nbd7 — Exchange (147)
          • D36h - 7...Nbd7 (not 8.Bd3, 8.Nf3) (0)
          • D36h - 8.Nf3 (22)
          • D36i - 8.Bd3 (not 8...Nf8, 8...O-O) (31)
          • D36j - 8.Bd3 Nf8 (1)
          • D36k - 8.Bd3 O-O (not 9.Nf3, 9.Nge2) (0)
          • D36k - 8.Bd3 O-O 9.Nge2 (not 9...Re8, 9...h6) (0)
          • D36k - 8.Bd3 O-O 9.Nge2 h6 (not 10.Bh4) (0)
          • D36k - 8.Bd3 O-O 9.Nge2 h6 10.Bh4 — Main Line (1)
          • D36l - 8.Bd3 O-O 9.Nge2 Re8 (not 10.O-O) (1)
          • D36m - 8.Bd3 O-O 9.Nge2 Re8 10.O-O (not 10...Nf8) (0)
          • D36m - 8.Bd3 O-O 9.Nge2 Re8 10.O-O Nf8 (not 11.f3) (6)
          • D36n - 8.Bd3 O-O 9.Nge2 Re8 10.O-O Nf8 11.f3 — Main Line (11)
          • D36o - 8.Bd3 O-O 9.Nf3 (not 9...Re8, 9...h6) (0)
          • D36o - 8.Bd3 O-O 9.Nf3 h6 (not 10.Bh4) (0)
          • D36o - 8.Bd3 O-O 9.Nf3 h6 10.Bh4 — Main Line (1)
          • D36p - 8.Bd3 O-O 9.Nf3 Re8 (not 10.O-O, 10.O-O-O, 10.h3) (0)
          • D36p - 8.Bd3 O-O 9.Nf3 Re8 10.h3 (not 10...Nf8) (0)
          • D36p - 8.Bd3 O-O 9.Nf3 Re8 10.h3 Nf8 (not 11.Bf4) (3)
          • D36q - 8.Bd3 O-O 9.Nf3 Re8 10.h3 Nf8 11.Bf4 — Main Line (15)
          • D36r - 8.Bd3 O-O 9.Nf3 Re8 10.O-O-O (not 10...Nf8) (0)
          • D36r - 8.Bd3 O-O 9.Nf3 Re8 10.O-O-O h6 11.Bh4 — Main Line (3)
          • D36r - 8.Bd3 O-O 9.Nf3 Re8 10.O-O-O Nf8 (not 11.h3) (0)
          • D36r - 8.Bd3 O-O 9.Nf3 Re8 10.O-O-O Nf8 11.h3 — Main Line (0)
          • D36s - 8.Bd3 O-O 9.Nf3 Re8 10.O-O (not 10...Nf8, 10...h6) (1)
          • D36t - 8.Bd3 O-O 9.Nf3 Re8 10.O-O h6 (not 11.Bf4, 11.Bh4) (0)
          • D36t - 8.Bd3 O-O 9.Nf3 Re8 10.O-O h6 11.Bf4 — Main Line (8)
          • D36t - 8.Bd3 O-O 9.Nf3 Re8 10.O-O h6 11.Bh4 — Main Line (0)
          • D36u - 8.Bd3 O-O 9.Nf3 Re8 10.O-O Nf8 (not 11.Rab1, 11.Rae1, 11.h3) (3)
          • D36v - 8.Bd3 O-O 9.Nf3 Re8 10.O-O Nf8 11.Rae1 — Main Line (9)
          • D36w - 8.Bd3 O-O 9.Nf3 Re8 10.O-O Nf8 11.h3 — Main Line (23)
          • D36y - 8.Bd3 O-O 9.Nf3 Re8 10.O-O Nf8 11.Rab1 (not 11...a5) (5)
          • D36z - 8.Bd3 O-O 9.Nf3 Re8 10.O-O Nf8 11.Rab1 a5 — Main Line (3)
        • 6...Be7 7.e3 O-O — Exchange (1)
          • D36f - 7...O-O (not 8.Bd3) (0)
          • D36f - 8.Bd3 (1)
        • 6...Be7 7.Nf3 g6 — Exchange (17)
          • D36d - 7...g6 (not 8.e3) (6)
          • D36e - 8.e3 (11)
      • D36a - 6...g6 (7)
      • D36b - 6...Na6 (6)
      • D36c - 6...Be7 (not 7.Nf3, 7.e3) (0)
      • D36c - 6...Be7 7.Nf3 (not 7...Nbd7, 7...O-O) (0)
      • D36c - 6...Be7 7.Nf3 Nbd7 (6)
      • D36c - 6...Be7 7.Nf3 O-O (0)
      • D36f - 6...Be7 7.e3 (not 7...Nbd7, 7...O-O, 7...h6) (0)
      • D37a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 - Queen's Gambit Declined: Three Knights Variation (703)
        • 4...a6 - Three Knights Variation (3)
        • 4...Be7 5.Bg5 (3)
        • 4...Be7 5.e3 (1)
        • 4...Be7 5.g3 (1)
        • 4...Be7 5.h3 (1)
        • 4...h6 - Three Knights Variation (5)
      • D37b - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 - Queen's Gambit Declined: Barmen Variation (609)
        • 5.Bf4 O-O (457)
          • D37l - 6.e3 c6 (4)
          • D37n - 6...c5 7.dxc5 (not 7...Bxc5) (5)
          • D37o - 6...c5 7.dxc5 Bxc5 (not 8.Qc2, 8.a3, 8.cxd5) (11)
          • D37p - 6.e3 c5 7.dxc5 Bxc5 8.a3 (31)
          • D37q - 6.e3 c5 7.dxc5 Bxc5 8.cxd5 (42)
          • D37r - 6.e3 c5 7.dxc5 Bxc5 8.Qc2 (7)
          • D37s - 6...c5 7.dxc5 Bxc5 8.Qc2 Nc6 9.a3 (not 9...Qa5) (8)
          • D37t - 6...c5 7.dxc5 Bxc5 8.Qc2 Nc6 9.a3 Qa5 (not 10.O-O-O, 10.Rd1) (12)
          • D37u - 6.e3 c5 7.dxc5 Bxc5 8.Qc2 Nc6 9.a3 Qa5 10.Rd1 (48)
          • D37v - 6.e3 c5 7.dxc5 Bxc5 8.Qc2 Nc6 9.a3 Qa5 10.O-O-O (24)
        • 5.cxd5 - Barmen Variation (7)
        • 5.e3 - Barmen Variation (1)
        • 5.e3 O-O (30)
          • D37f - 5...O-O (not 6.Bd3, 6.b3) (0)
          • D37f - 6.b3 (21)
          • D37g - 6.Bd3 (9)
        • 5.g3 - Barmen Variation (1)
        • 5.Qc2 - Barmen Variation (4)
      • D37c - 5.Bf4 - Barmen Variation (46)
      • D37d - 4...Be7 (not 5.Bf4, 5.e3, 5.cxd5) (0)
      • D37d - 5.cxd5 Nxd5 (21)
      • D37h - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 - Queen's Gambit Declined: Harrwitz Attack (22)
      • D37i - 1. d4 d5 2. Nf3 e6 3. c4 Nf6 4. Nc3 Be7 5. Bf4 O-O - Queen's Gambit Declined: Harrwitz Attack (280)
        • 6.a3 - Harrwitz Attack (1)
        • 6.e3 - Harrwitz Attack (1)
        • 6.Qc2 - Harrwitz Attack (1)
        • D37 - 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Be7 5. Bf4 O-O 6. e3 - Queen's Gambit Declined: Harrwitz Attack (246)
          • D37j - 1. c4 e6 2. Nc3 d5 3. d4 Be7 4. Bf4 Nf6 5. e3 O-O 6. Nf3 Nbd7 - Queen's Gambit Declined: Harrwitz Attack (191)
            • 7.c5 (3)
          • D37k - 6...b6 - Harrwitz Attack (49)
          • D37m - 6...c5 - Harrwitz Attack (5)
      • D38 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 - Queen's Gambit Declined: Ragozin Defense (517)
        • 5.Bg5 h6 — Ragozin (147)
          • D38l - (not 6.Bxf6) (11)
          • D38m - 6.Bxf6 Qxf6 (not 7.cxd5, 7.e3) (55)
          • D38n - 6.Bxf6 Qxf6 7.cxd5 (not 7...exd5) (0)
          • D38n - 6.Bxf6 Qxf6 7.cxd5 exd5 (18)
          • D38o - 6.Bxf6 Qxf6 7.e3 (18)
          • D38p - 6.Bxf6 Qxf6 7.e3 O-O 8.Rc1 (45)
        • 5.Bg5 Nbd7 — Ragozin (81)
          • D38i - (not 6.cxd5) (17)
          • D38j - 6.cxd5 exd5 7.Qc2 (32)
          • D38k - 6.cxd5 exd5 7.e3 (32)
        • 5.cxd5 exd5 — Ragozin (98)
          • D38f - 6.Bg5 (not 6...h6) (26)
          • D38g - 6...h6 (not 7.Bh4) (0)
          • D38g - 6.Bg5 h6 7.Bh4 (72)
        • 5.Qa4+ Nc6 — Ragozin (10)
          • D38c - 6.cxd5 (0)
          • D38d - 6.cxd5 exd5 7.Bg5 (10)
        • 5.Qb3 - Ragozin Defense (2)
        • D38a - 4...Bb4 (not 5.Qa4+, 5.cxd5) (9)
        • D38b - 5.Qa4+ (112)
        • D38e - 5.cxd5 (not 5...exd5) (16)
        • D38h - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 - Queen's Gambit Declined: Ragozin Defense (14)
          • 5...Nbd7 6.e3 c5 (1)
      • D39a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 dxc4 - Queen's Gambit Declined: Ragozin Defense, Vienna Variation (125)
        • 6.e4 c5 — Ragozin (89)
          • D39d - 6...c5 (not 7.Bxc4, 7.e5) (1)
          • D39e - 7.e5 (not 7...cxd4) (3)
          • D39f - 7.e5 cxd4 (7)
          • D39g - 7.e5 cxd4 8.Qa4+ Nc6 9.O-O-O (12)
          • D39h - 7.Bxc4 (not 7...cxd4) (0)
          • D39h - 7.Bxc4 cxd4 (not 8.Nxd4) (0)
          • D39h - 7.Bxc4 cxd4 8.Nxd4 (not 8...Bxc3+, 8...Qa5) (4)
          • D39i - 7.Bxc4 cxd4 8.Nxd4 Qa5 (15)
          • D39j - 7.Bxc4 cxd4 8.Nxd4 Bxc3+ (not 9.bxc3) (0)
          • D39j - 7.Bxc4 cxd4 8.Nxd4 Bxc3+ 9.bxc3 (11)
          • D39k - 7.Bxc4 cxd4 8.Nxd4 Bxc3+ 9.bxc3 Qa5 10.Bb5+ (36)
      • D39b - 6.Qa4+ (2)
      • D39c - 6.e4 (not 6...c5) (27)
      • D51 - 5.Bg5 - Barmen Variation (3)
    • D40-D42 – 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 – Queen’s Gambit Declined: Semi-Tarrasch Defense (403)
      • D40a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 - Queen's Gambit Declined: Semi-Tarrasch Defense (99)
        • 5.e3 a6 (29)
          • D40d - 5...a6 (not 6.cxd5) (8)
          • D40e - 6.cxd5 (not 6...exd5) (0)
          • D40e - 6.cxd5 exd5 (21)
        • 5.e3 Nc6 (63)
          • D40g - 6.Bd3 (0)
          • D40h - 6.Bd3 Bd6 7.O-O O-O (0)
          • D40i - 6.a3 (not 6...Ne4, 6...a6, 6...cxd4, 6...dxc4) (1)
          • D40j - 6.a3 Ne4 (3)
          • D40k - 6.a3 dxc4 (17)
          • D40l - 6.a3 cxd4 (not 7.exd4) (0)
          • D40l - 6.a3 cxd4 7.exd4 Be7 (not 8.Bd3, 8.c5) (2)
          • D40m - 6.a3 cxd4 7.exd4 Be7 8.c5 (5)
          • D40n - 6.a3 cxd4 7.exd4 Be7 8.Bd3 (2)
          • D40o - 6.a3 a6 (not 7.b3, 7.dxc5) (5)
          • D40p - 6.a3 a6 7.b3 (4)
          • D40q - 6.a3 a6 7.dxc5 (not 7...Bxc5) (0)
          • D40q - 6.a3 a6 7.dxc5 Bxc5 (8)
          • D40r - 6.a3 a6 7.dxc5 Bxc5 8.b4 Ba7 (15)
      • D40a - 5.e3 (not 5...Be7, 5...cxd4) (0)
      • D40b - 5.e3 Be7 (0)
      • D40c - 5.e3 cxd4 (1)
      • D41 - 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 e6 - Queen's Gambit Declined: Semi-Tarrasch Defense (257)
        • 6.e3 cxd4 (9)
          • D41p - 6...cxd4 (not 7.exd4) (0)
          • D41p - 7.exd4 (9)
        • 6.e3 Nc6 — Main Line (10)
          • D41q - 6...Nc6 (not 7.Bc4) (0)
          • D41r - 7.Bc4 (not 7...cxd4) (0)
          • D41r - 7.Bc4 cxd4 8.exd4 (not 8...Be7) (0)
          • D41r - 7.Bc4 cxd4 8.exd4 Be7 (2)
          • D41s - 7.Bc4 cxd4 8.exd4 Be7 9.O-O O-O (7)
          • D41t - 7.Bc4 cxd4 8.exd4 Be7 9.O-O O-O 10.Re1 Nxc3 11.bxc3 (not 11...b6) — Main Line (0)
          • D41t - 7.Bc4 cxd4 8.exd4 Be7 9.O-O O-O 10.Re1 Nxc3 11.bxc3 b6 12.Bd3 Bb7 (not 13.Qc2, 13.h4) (0)
          • D41u - 7.Bc4 cxd4 8.exd4 Be7 9.O-O O-O 10.Re1 Nxc3 11.bxc3 b6 12.Bd3 Bb7 13.Qc2 — Main Line (1)
          • D41v - 7.Bc4 cxd4 8.exd4 Be7 9.O-O O-O 10.Re1 Nxc3 11.bxc3 b6 12.Bd3 Bb7 13.h4 — Main Line (0)
        • 6.e4 Nxc3 — Main Line (110)
          • D41k - (not 7.bxc3) (0)
          • D41k - 7.bxc3 cxd4 8.cxd4 (not 8...Bb4+, 8...Nc6) (0)
          • D41l - 7.bxc3 cxd4 8.cxd4 Nc6 (11)
          • D41m - 7.bxc3 cxd4 8.cxd4 Bb4+ (not 9.Bd2) (0)
          • D41m - 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bb5 (30)
          • D41m - 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Qa5 (0)
          • D41n - 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bc4 (not 11...Nc6) — Main Line (0)
          • D41n - 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bc4 Nc6 12.O-O (not 12...b6) (61)
          • D41o - 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bc4 Nc6 12.O-O b6 (not 13.Rad1) (0)
          • D41o - 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bc4 Nc6 12.O-O b6 13.Rad1 — Main Line (8)
        • 6.g3 Nc6 — Main Line (62)
          • D41c - (not 7.Bg2) (0)
          • D41c - 7.Bg2 Be7 (33)
          • D41d - 7.Bg2 Be7 8.O-O O-O (not 9.Nxd5, 9.e4) (0)
          • D41e - 7.Bg2 Be7 8.O-O O-O 9.e4 (not 9...Nb6, 9...Ndb4) (1)
          • D41f - 7.Bg2 Be7 8.O-O O-O 9.e4 Nb6 — Main Line (4)
          • D41g - 7.Bg2 Be7 8.O-O O-O 9.e4 Ndb4 — Main Line (8)
          • D41h - 7.Bg2 Be7 8.O-O O-O 9.Nxd5 — Main Line (5)
          • D41i - 7.Bg2 Be7 8.O-O O-O 9.Nxd5 exd5 10.dxc5 Bxc5 (not 11.Bg5) (4)
          • D41j - 7.Bg2 Be7 8.O-O O-O 9.Nxd5 exd5 10.dxc5 Bxc5 11.Bg5 — Main Line (7)
        • D41c - 6.g3 (not 6...Nc6) (0)
        • D41k - 6.e4 (not 6...Nxc3) (0)
        • D41p - 6.e3 (not 6...Nc6, 6...cxd4) (0)
      • D41b - 5.cxd5 cxd4 - Keres Counterattack (74)
      • D41c - 5.cxd5 Nxd5 - 5.cxd5 Nxd5 (2)
      • D42a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 - Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line (36)
        • 7...cxd4 8.exd4 Be7 — Main Line (26)
          • D42e - (not 9.O-O) — Main Line (0)
          • D42f - 9.O-O O-O (not 10.Re1, 10.a3) (0)
          • D42g - 9.O-O O-O 10.a3 (not 10...Bf6, 10...Nf6) (1)
          • D42h - 9.O-O O-O 10.a3 Nf6 — Main Line (2)
          • D42i - 9.O-O O-O 10.a3 Bf6 — Main Line (5)
          • D42j - 9.O-O O-O 10.Re1 (not 10...Bf6, 10...Ncb4, 10...Nf6) (1)
          • D42k - 9.O-O O-O 10.Re1 Ncb4 — Main Line (0)
          • D42l - 9.O-O O-O 10.Re1 Nf6 (not 11.Bg5, 11.a3) (0)
          • D42l - 9.O-O O-O 10.Re1 Nf6 11.Bg5 — Main Line (1)
          • D42m - 9.O-O O-O 10.Re1 Nf6 11.a3 (not 11...b6) (0)
          • D42m - 9.O-O O-O 10.Re1 Nf6 11.a3 b6 (not 12.Bc2, 12.Be3, 12.Bg5) (0)
          • D42m - 9.O-O O-O 10.Re1 Nf6 11.a3 b6 12.Be3 — Main Line (2)
          • D42n - 9.O-O O-O 10.Re1 Nf6 11.a3 b6 12.Bg5 — Main Line (1)
          • D42o - 9.O-O O-O 10.Re1 Nf6 11.a3 b6 12.Bc2 — Main Line (1)
          • D42p - 9.O-O O-O 10.Re1 Bf6 (not 11.Be4) (0)
          • D42p - 9.O-O O-O 10.Re1 Bf6 11.Be4 (not 11...Nce7) (0)
          • D42q - 9.O-O O-O 10.Re1 Bf6 11.Be4 Nce7 (not 12.Ne5) (8)
          • D42r - 9.O-O O-O 10.Re1 Bf6 11.Be4 Nce7 12.Ne5 — Main Line (4)
      • D42b - 7...Be7 (not 8.O-O) (3)
      • D42c - 7...Be7 8.O-O O-O (6)
      • D42d - 7...cxd4 (not 8.exd4) (0)
      • D42d - 7...cxd4 8.exd4 (not 8...Be7) (1)
    • D43-D49 Queen's Gambit Declined semi-Slav1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 (1208)
      • D43a - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 - Semi-Slav Defense (335)
        • 4...e6 - Semi-Slav (12)
        • 5.Bg5 Be7 (7)
          • D43f - 5...Be7 (not 6.e3) (0)
          • D43g - 6.e3 (not 6...Nbd7, 6...O-O) (0)
          • D43h - 6.e3 O-O (1)
          • D43i - 6.e3 Nbd7 (not 7.Bd3) (6)
          • D43j - 6.e3 Nbd7 7.Bd3 (0)
        • 5.Bg5 h6 — Main Line (236)
          • D43k - (not 6.Bh4, 6.Bxf6) (0)
          • D43k - 6.Bh4 Be7 (not 7.e3) (0)
          • D43k - 6.Bh4 Be7 7.e3 O-O (14)
          • D43k - 6.Bh4 dxc4 (not 7.e4) (0)
          • D43l - 6.Bh4 dxc4 7.e4 (16)
          • D43m - 6.Bh4 dxc4 7.e4 g5 8.Bg3 b5 9.Be2 (not 9...Bb7) (3)
          • D43n - 6.Bh4 dxc4 7.e4 g5 8.Bg3 b5 9.Be2 Bb7 — Main Line (60)
          • D43p - 6.Bxf6 Qxf6 7.g3 (12)
          • D43q - 6.Bxf6 Qxf6 7.Qb3 (20)
          • D43r - 6.Bxf6 Qxf6 7.Qc2 (5)
          • D43s - 6.Bxf6 Qxf6 7.e3 (not 7...Nd7) (24)
          • D43t - 6.Bxf6 Qxf6 7.e3 Nd7 (not 8.Bd3) (23)
          • D43u - 6.Bxf6 Qxf6 7.e3 Nd7 8.Bd3 (not 8...dxc4) (12)
          • D43v - 6.Bxf6 Qxf6 7.e3 Nd7 8.Bd3 dxc4 (not 9.Bxc4) (0)
          • D43v - 6.Bxf6 Qxf6 7.e3 Nd7 8.Bd3 dxc4 9.Bxc4 g6 (not 10.O-O) (0)
          • D43v - 6.Bxf6 Qxf6 7.e3 Nd7 8.Bd3 dxc4 9.Bxc4 g6 10.O-O (not 10...Bg7) (0)
          • D43v - 6.Bxf6 Qxf6 7.e3 Nd7 8.Bd3 dxc4 9.Bxc4 g6 10.O-O Bg7 (not 11.b4) (39)
          • D43w - 6.Bxf6 Qxf6 7.e3 Nd7 8.Bd3 dxc4 9.Bxc4 g6 10.O-O Bg7 11.b4 — Main Line (3)
        • D43 - 5. cxd5 (4)
      • D43b - 5. g3 (31)
      • D43c - 5. Qd3 (2)
      • D43d - 5.Qb3 (not 5...dxc4) (12)
      • D43e - 5.Qb3 dxc4 6.Qxc4 (25)
      • D43f - 5. Bg5 (14)
      • D43k - 5. ..h6 6. Bh4 - Semi-Slav Defense: Anti-Moscow Gambit (4)
      • D43o - 5...h6 6.Bxf6 - 6.Bxf6 (10)
      • D44a - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 - Semi-Slav Defense Accepted (90)
        • 6.e4 b5 — Main Line (74)
          • D44c - 6...b5 (not 7.a4, 7.e5) (0)
          • D44d - 7.a4 (4)
          • D44e - 7.e5 (0)
          • D44f - 7.e5 h6 8.Bh4 g5 9.exf6 (0)
          • D44g - 7.e5 h6 8.Bh4 g5 9.exf6 gxh4 10.Ne5 (0)
          • D44h - 7.e5 h6 8.Bh4 g5 9.Nxg5 (not 9...Nd5, 9...hxg5) (0)
          • D44i - 7.e5 h6 8.Bh4 g5 9.Nxg5 Nd5 (5)
          • D44j - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 (10)
          • D44k - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.g3 (not 11...Bb7, 11...Qa5) (7)
          • D44l - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.g3 Qa5 (2)
          • D44m - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.g3 Bb7 (13)
          • D44n - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.Qf3 (0)
          • D44o - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.exf6 — Main Line (2)
          • D44p - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.exf6 Bb7 12.g3 (not 12...c5) (4)
          • D44q - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.exf6 Bb7 12.g3 c5 — Main Line (12)
          • D44r - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.exf6 Bb7 12.g3 c5 13.d5 Qb6 — Main Line (15)
      • D44b - 6.a4 (13)
      • D44c - 6.e4 - 6.e4 (2)
      • D45a - 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 - Semi-Slav Defense: Main Line (322)
        • 5...Nbd7 6.Be2 (1)
        • 5...Nbd7 6.h3 (4)
        • 7.d4 (1)
      • D45b - 5...Bd6 (not 6.Ne5, 6.a3, 6.Qc2, 6.Bd3) (0)
      • D45c - 5...Be7 (not 6.Ne5, 6.a3, 6.Qc2, 6.Bd3) (2)
      • D45d - 5...Ne4 (not 6.Ne5, 6.a3, 6.Qc2, 6.Bd3) (0)
      • D45d - 6.Bd3 f5 (2)
      • D45e - 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 a6 - Semi-Slav Defense: Accelerated Meran Variation (307)
        • 6.Qc2 Bd6 (169)
          • D45k - 6...Bd6 (not 7.Bd2, 7.Be2, 7.b3, 7.e4, 7.g4) (0)
          • D45k - 7.e4 (11)
          • D45l - 7.g4 (not 7...Bb4, 7...Nxg4, 7...dxc4, 7...h6) (0)
          • D45l - 7.g4 h6 (19)
          • D45m - 7.g4 dxc4 (14)
          • D45n - 7.g4 Bb4 (4)
          • D45o - 7.g4 Nxg4 (8)
          • D45p - 7.b3 (not 7...O-O) (0)
          • D45p - 7.b3 O-O (not 8.Bb2, 8.Be2) (2)
          • D45q - 7.b3 O-O 8.Bb2 (15)
          • D45r - 7.b3 O-O 8.Be2 (not 8...Re8, 8...b6) (14)
          • D45s - 7.b3 O-O 8.Be2 b6 (42)
          • D45t - 7.b3 O-O 8.Be2 Re8 (1)
          • D45u - 7.Bd2 (4)
          • D45v - 7.Be2 (not 7...O-O) (0)
          • D45v - 7.Be2 O-O 8.O-O (not 8...Re8, 8...e5) (18)
          • D45w - 7.Be2 O-O 8.O-O e5 (4)
          • D45y - 7.Be2 O-O 8.O-O Re8 (13)
      • D45f - 5...Nbd7 (not 6.Ne5, 6.a3) (0)
      • D45f - 6.Ne5 (40)
      • D45g - 6.a3 (0)
      • D45h - 5...Nbd7 6.Qc2 - 6.Qc2 (14)
      • D45i - 6.Qc2 b6 (33)
      • D45j - 6.Qc2 Be7 (1)
      • D46a - 5. e3 Nbd7 6. Bd3 - Semi-Slav Defense: Main Line (not 6.... dxc4) (217)
        • 10.Qc2 (1)
        • 6...Bb4 7.O-O O-O — Main Line (23)
          • D46c - 6...Be7 7.O-O O-O (not 8.b3) (5)
          • D46d - 8.b3 (3)
          • D46o - 6...Bd6 7.O-O O-O (not 8.e4) (1)
          • D46p - 6...Bd6 7.O-O O-O 8.e4 (not 8...dxc4, 8...dxe4) (0)
          • D46p - 6...Bd6 7.O-O O-O 8.e4 dxc4 (not 9.Bxc4) (0)
          • D46p - 6...Bd6 7.O-O O-O 8.e4 dxc4 9.Bxc4 (not 9...e5) (0)
          • D46p - 8.e4 dxc4 9.Bxc4 e5 (10)
          • D46q - 6...Bd6 7.O-O O-O 8.e4 dxe4 (not 9.Nxe4) (0)
          • D46q - 6...Bd6 7.O-O O-O 8.e4 dxe4 9.Nxe4 Nxe4 10.Bxe4 (not 10...h6) (2)
          • D46q - 8.e4 dxe4 9.Nxe4 (not 9...Nxe4) — Main Line (0)
          • D46r - 6...Bd6 7.O-O O-O 8.e4 dxe4 9.Nxe4 Nxe4 10.Bxe4 h6 (not 11.Bc2) (0)
          • D46r - 6...Bd6 7.O-O O-O 8.e4 dxe4 9.Nxe4 Nxe4 10.Bxe4 h6 11.Bc2 (not 11...e5) (0)
          • D46r - 8.e4 dxe4 9.Nxe4 Nxe4 10.Bxe4 h6 11.Bc2 e5 — Main Line (2)
        • 6...Bd6 7.Qc2 dxc4 (3)
          • D46g - 7...dxc4 (not 8.Bxc4) (0)
          • D46g - 8.Bxc4 (3)
        • 6...Bd6 7.Qc2 O-O — Main Line (161)
          • D46h - (not 8.O-O) (27)
          • D46i - 8.O-O dxc4 9.Bxc4 (not 9...Qe7, 9...a6, 9...b5, 9...e5) (0)
          • D46i - 8.O-O dxc4 9.Bxc4 e5 — Main Line (9)
          • D46j - 8.O-O dxc4 9.Bxc4 Qe7 (not 10.Bd2, 10.a3, 10.h3) (0)
          • D46j - 8.O-O dxc4 9.Bxc4 Qe7 10.a3 — Main Line (0)
          • D46j - 8.O-O dxc4 9.Bxc4 Qe7 10.Bd2 — Main Line (14)
          • D46j - 8.O-O dxc4 9.Bxc4 Qe7 10.h3 — Main Line (0)
          • D46k - 8.O-O dxc4 9.Bxc4 a6 (not 10.Rd1) (0)
          • D46k - 8.O-O dxc4 9.Bxc4 a6 10.Rd1 (not 10...b5) (0)
          • D46k - 8.O-O dxc4 9.Bxc4 a6 10.Rd1 b5 — Main Line (51)
          • D46l - 8.O-O dxc4 9.Bxc4 b5 (not 10.Be2) (19)
          • D46m - 8.O-O dxc4 9.Bxc4 b5 10.Be2 (not 10...Bb7) (0)
          • D46m - 8.O-O dxc4 9.Bxc4 b5 10.Be2 Bb7 (not 11.Rd1) (0)
          • D46m - 8.O-O dxc4 9.Bxc4 b5 10.Be2 Bb7 11.Rd1 — Main Line (41)
        • D46 - 6... Bb4 (variante Romih or Romih-Van Scheltinga or Ragozine) ; (0)
        • D46 - 6... Be7 (variante Bogoljubov) (1)
      • D46a - 6...a6 (1)
      • D46b - 6...Bb4 (not 7.O-O) (0)
      • D46b - 6...Bb4 7.O-O (not 7...O-O) (10)
      • D46c - 6...Be7 (not 7.O-O) (0)
      • D46c - 6...Be7 7.O-O (not 7...O-O) (0)
      • D46e - 6...Bd6 (not 7.O-O, 7.e4) (0)
      • D46e - 6...Bd6 7.e4 (not 7...dxe4) (0)
      • D46e - 6...Bd6 7.e4 dxe4 8.Nxe4 (10)
      • D46f - D46 6....Bd6 7. Qc2 - Semi-Slav Defense: Chigorin Defense (6)
        • 7...O-O 8.O-O (1)
        • D46 - 7... dxc4 - Semi-Slav Defense: Chigorin Defense (4)
      • D46n - 6...Bd6 7.O-O (not 7...O-O) (1)
      • D47 - 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 - Semi-Slav Defense: Semi-Meran Variation (147)
        • 7...b5 8.Bd3 b4 — Lundin (51)
          • D47i - 8...b4 (not 9.Na4, 9.Ne4) (0)
          • D47i - 9.Na4 (1)
          • D47j - 9.Ne4 (not 9...Be7, 9...Nxe4) (3)
          • D47k - 9.Ne4 Nxe4 (9)
          • D47l - 9.Ne4 Be7 (not 10.O-O) (0)
          • D47l - 9.Ne4 Be7 10.O-O (2)
        • 7...b5 8.Bd3 Bb7 — Wade (77)
          • D47m - 8...Bb7 (not 9.O-O, 9.a3, 9.e4) (0)
          • D47m - 9.a3 (32)
          • D47n - 9.O-O (not 9...b4) (0)
          • D47n - 9.O-O b4 (not 10.Ne4) (2)
          • D47o - 9.O-O b4 10.Ne4 (not 10...Be7) (0)
          • D47o - 9.O-O b4 10.Ne4 Be7 (not 11.Nxf6+) (0)
          • D47p - 9.O-O b4 10.Ne4 Be7 11.Nxf6+ (not 11...Nxf6) (0)
          • D47p - 9.O-O b4 10.Ne4 Be7 11.Nxf6+ Nxf6 (not 12.e4) (0)
          • D47p - 9.O-O b4 10.Ne4 Be7 11.Nxf6+ Nxf6 12.e4 (10)
          • D47q - 9.e4 (0)
          • D47r - 9.e4 b4 10.Na4 c5 11.e5 Nd5 (not 12.Nxc5, 12.O-O) (4)
          • D47s - 9.e4 b4 10.Na4 c5 11.e5 Nd5 12.Nxc5 — Main Line (4)
          • D47t - 9.e4 b4 10.Na4 c5 11.e5 Nd5 12.O-O — Main Line (23)
        • 7...b5 8.Be2 Bb7 — Capablanca (18)
          • D47f - 8...Bb7 (not 9.O-O) (0)
          • D47f - 9.O-O (not 9...a6) (11)
          • D47g - 9.O-O a6 (3)
        • 7.Bxc4 (0)
          • D47a - (other 7.Bxc4) (0)
        • D47a - 7...b5 (not 8.Bb3, 8.Bd3, 8.Be2) (0)
        • D47a - 7.Bxc4 (not 7...b5) (0)
        • D47b - 7...b5 8.Bb3 (not 8...b4) (1)
        • D47c - 7...b5 8.Bb3 b4 (1)
        • D47d - 7...b5 8.Be2 (not 8...a6, 8...b4) (0)
        • D47d - 7...b5 8.Be2 b4 (2)
        • D47e - 7...b5 8.Be2 a6 (2)
        • D47h - 7...b5 8.Bd3 (not 8...Bd6) (0)
        • D47h - 7...b5 8.Bd3 Bd6 (36)
      • D48 - 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 - Semi-Slav Defense: Meran Variation (72)
        • 9.e4 c5 — Main Line (18)
          • D48k - 9...c5 (not 10.d5, 10.e5) (0)
          • D48l - 10.d5 (not 10...Qc7, 10...c4, 10...e5) (0)
          • D48m - 10.d5 e5 (1)
          • D48n - 10.d5 Qc7 (1)
          • D48o - 10.d5 c4 (8)
          • D48p - 10.d5 c4 11.dxe6 fxe6 (not 12.Bc2) (0)
          • D48p - 10.d5 c4 11.dxe6 fxe6 12.Bc2 (not 12...Qc7) (0)
          • D48p - 10.d5 c4 11.dxe6 fxe6 12.Bc2 Qc7 (not 13.O-O) (0)
          • D48p - 10.d5 c4 11.dxe6 fxe6 12.Bc2 Qc7 13.O-O (6)
          • D48q - 10.e5 (not 10...Ng4, 10...cxd4) (0)
          • D48r - 10.e5 Ng4 (1)
          • D48s - 10.e5 cxd4 — Main Line (1)
        • 9.O-O Bb7 (49)
          • D48e - 9...Bb7 (not 10.e4) (5)
          • D48f - 10.e4 (not 10...c5) (0)
          • D48f - 10.e4 c5 11.d5 (not 11...Qc7) (16)
          • D48g - 10.e4 c5 11.d5 Qc7 (not 12.dxe6) (0)
          • D48g - 10.e4 c5 11.d5 Qc7 12.dxe6 (not 12...fxe6) (0)
          • D48g - 10.e4 c5 11.d5 Qc7 12.dxe6 fxe6 (28)
        • 9.O-O c5 (2)
          • D48c - 9...c5 (not 10.Qe2) (0)
          • D48d - 10.Qe2 (2)
        • D48a - 8...a6 (not 9.O-O, 9.a4, 9.e4) (3)
        • D48b - 9.a4 (3)
        • D48c - 9.O-O (not 9...Bb7, 9...c5) (0)
        • D48h - 9.e4 (not 9...Bb7, 9...b4) (0)
        • D48i - 9.e4 Bb7 (0)
        • D48j - 9.e4 b4 (0)
      • D49 - 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 - Semi-Slav Defense: Meran Variation, Blumenfeld Variation (25)
        • 11...Nxe5 12.Nxe5 axb5 (9)
          • D49f - 13.O-O (3)
          • D49g - 13.Qf3 (not 13...Bb4) (0)
          • D49g - 13.Qf3 Bb4+ (0)
          • D49h - 13.Bxb5+ (6)
        • D49a - 11.Nxb5 (not 11...Ng4, 11...Nxe5, 11...axb5) (16)
        • D49b - 11...Ng4 (not 12.Qa4) (3)
        • D49c - 11...Ng4 12.Qa4 (not 12...Ngxe5) (1)
        • D49d - 11...Ng4 12.Qa4 Ngxe5 (0)
        • D49e - 11...Nxe5 (not 12.Nxe5) (0)
        • D49i - 11...axb5 (not 12.exf6) (13)
        • D49j - 11...axb5 12.exf6 Qb6 (4)
        • D49k - 11...axb5 12.exf6 gxf6 (8)
    • D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5 (737)
      • D50 - 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 - Queen's Gambit Declined: Modern Variation (17)
      • D51 - 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 - Queen's Gambit Declined: Modern Variation, Knight Defense (29)
      • D52a - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 - Queen's Gambit Declined (60)
        • 6...Qa5 7.cxd5 Nxd5 — Cambridge Springs (22)
          • D52e - 7...Nxd5 (not 8.Qd2) (7)
          • D52f - 8.Qd2 (15)
        • 6...Qa5 7.Nd2 Bb4 — Cambridge Springs (15)
          • D52i - 7...Bb4 (not 8.Qc2) (5)
          • D52j - 8.Qc2 (not 8...O-O, 8...dxc4) (1)
          • D52k - 8.Qc2 dxc4 (1)
          • D52l - 8.Qc2 O-O (not 9.Be2, 9.Bh4) (2)
          • D52m - 8.Qc2 O-O 9.Bh4 (0)
          • D52n - 8.Qc2 O-O 9.Be2 (not 9...e5) (6)
          • D52o - 8.Qc2 O-O 9.Be2 e5 (0)
      • D52b - 6...Qa5 (not 7.Bxf6, 7.Nd2, 7.cxd5) (0)
      • D52c - 6...Qa5 7.Bxf6 (0)
      • D52d - 6...Qa5 7.cxd5 (not 7...Nxd5) (5)
      • D52g - 7.Nd2 (not 7...dxc4) (0)
      • D52h - 6...Qa5 7.Nd2 dxc4 (10)
      • D53a - 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 - Queen's Gambit Declined (112)
        • 5.e3 Nbd7 (6)
          • D53r - 5...Nbd7 (not 6.Nf3) (2)
          • D53s - 6.Nf3 (4)
        • 5.e3 O-O (2)
          • D53u - 5...O-O (not 6.Qc2) (0)
          • D53v - 6.Qc2 (not 6...c5) (0)
          • D53v - 6.Qc2 c5 (2)
        • 5.Nf3 h6 (84)
          • D53d - 5...h6 (not 6.Bh4, 6.Bxf6) (1)
          • D53e - 6.Bxf6 (not 6...Bxf6) (0)
          • D53f - 6.Bxf6 Bxf6 (not 7.e3) (20)
          • D53g - 6.Bxf6 Bxf6 7.e3 (20)
          • D53h - 6.Bh4 (not 6...O-O) (12)
          • D53i - 6.Bh4 O-O (not 7.Qc2, 7.Rc1) (0)
          • D53j - 6.Bh4 O-O 7.Qc2 (8)
          • D53k - 6.Bh4 O-O 7.Rc1 (23)
        • 5.Nf3 O-O (8)
          • D53l - 5...O-O (not 6.Qc2) (1)
          • D53m - 6.Qc2 (not 6...Nbd7, 6...c5) (5)
          • D53n - 6.Qc2 Nbd7 (0)
          • D53o - 6.Qc2 c5 (2)
      • D53b - 5.cxd5 Nxd5 (1)
      • D53p - 5.e3 (not 5...Ne4, 5...h6) (0)
      • D53q - 5.e3 Ne4 (0)
      • D53t - 5.e3 h6 (5)
      • D54 - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Rc1 - Queen's Gambit Declined: Neo-Orthodox Variation (21)
        • 6...h6 7.Bh4 b6 — Orthodox (13)
          • D54c - (not 8.cxd5) (0)
          • D54c - 8.cxd5 Nxd5 9.Nxd5 (5)
          • D54d - 8.cxd5 Nxd5 9.Nxd5 exd5 10.Bxe7 Qxe7 (not 11.Be2) (6)
          • D54e - 8.cxd5 Nxd5 9.Nxd5 exd5 10.Bxe7 Qxe7 11.Be2 — Main Line (2)
        • D54b - 6...h6 7.Bh4 (not 7...b6) (7)
      • D55a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 - Queen's Gambit Declined: Modern Variation, Normal Line (73)
        • 6...h6 7.Bxf6 Bxf6 — Orthodox (60)
          • D55i - 8.Qb3 (11)
          • D55j - 8.Rc1 (16)
          • D55k - 8.Rc1 c6 9.Bd3 Nd7 10.O-O dxc4 11.Bxc4 (33)
      • D55b - 6...Ne4 (0)
      • D55c - 6...b6 (not 7.Be2) (1)
      • D55d - 6...b6 7.Be2 (0)
      • D55e - 6...b6 7.cxd5 exd5 (2)
      • D55f - 6...b6 7.cxd5 Nxd5 (0)
      • D55g - 6...h6 (not 7.Bxf6) (0)
      • D55h - 6...h6 7.Bxf6 (not 7...Bxf6) (10)
      • D56 - 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 - Queen's Gambit Declined: Lasker Defense (66)
      • D57 - 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 - Queen's Gambit Declined: Lasker Defense, Main Line (9)
      • D58a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 - Queen's Gambit Declined: Tartakower Defense (215)
        • 8.Bd3 Bb7 — Tartakower (39)
          • D58f - 8...Bb7 (not 9.O-O) (5)
          • D58g - 9.O-O (not 9...Nbd7) (3)
          • D58h - 9.O-O Nbd7 (not 10.Bg3, 10.Qe2, 10.Rc1) (0)
          • D58h - 9.O-O Nbd7 10.Bg3 (0)
          • D58h - 9.O-O Nbd7 10.Rc1 (not 10...c5) (0)
          • D58h - 9.O-O Nbd7 10.Rc1 c5 (14)
          • D58i - 9.O-O Nbd7 10.Qe2 (not 10...c5) (8)
          • D58j - 9.O-O Nbd7 10.Qe2 c5 (not 11.Bg3, 11.Rfd1) (0)
          • D58j - 9.O-O Nbd7 10.Qe2 c5 11.Bg3 (0)
          • D58j - 9.O-O Nbd7 10.Qe2 c5 11.Rfd1 (9)
        • 8.Be2 Bb7 — Tartakower (83)
          • D58k - (not 9.Bxf6) (14)
          • D58l - 9.Bxf6 Bxf6 10.cxd5 (not 10...exd5) (0)
          • D58l - 9.Bxf6 Bxf6 10.cxd5 exd5 (not 11.O-O, 11.b4) (3)
          • D58m - 9.Bxf6 Bxf6 10.cxd5 exd5 11.O-O (31)
          • D58n - 9.Bxf6 Bxf6 10.cxd5 exd5 11.b4 (not 11...c5, 11...c6) (0)
          • D58n - 9.Bxf6 Bxf6 10.cxd5 exd5 11.b4 c5 (19)
          • D58o - 9.Bxf6 Bxf6 10.cxd5 exd5 11.b4 c6 (not 12.O-O) (0)
          • D58o - 9.Bxf6 Bxf6 10.cxd5 exd5 11.b4 c6 12.O-O (16)
        • 8.cxd5 exd5 — Tartakower (2)
          • D58s - 8...exd5 (not 9.Bd3) (1)
          • D58t - 9.Bd3 (1)
        • 8.Rc1 Bb7 — Tartakower (40)
          • D58p - 8...Bb7 (not 9.Bxf6, 9.cxd5) (24)
          • D58q - 9.cxd5 (not 9...exd5) (4)
          • D58q - 9.cxd5 exd5 (2)
          • D58r - 9.Bxf6 (not 9...Bxf6) (0)
          • D58r - 9.Bxf6 Bxf6 10.cxd5 exd5 (10)
      • D58b - 8.Qb3 (25)
      • D58c - 8.Qc2 (1)
      • D58d - 8.Bxf6 (2)
      • D58e - 8.Bd3 (not 8...Bb7) (6)
      • D58k - 8.Be2 (not 8...Bb7) (0)
      • D58p - 8.Rc1 (not 8...Bb7) (0)
      • D58s - 8.cxd5 (not 8...exd5) (10)
      • D59f - 11...Bxd5 (not 12.Bd3, 12.Qa4) (5)
      • D59l - 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6 - Queen's Gambit Declined: Tartakower Defense (9)
      • D59m - 12.Bd3 (0)
      • D59n - 10.Nxd5 exd5 11.Rc1 Be6 12.Qa4 (not 12...c5) (0)
      • D59n - 12.Qa4 c5 (3)
      • D60 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 - Queen's Gambit Declined: Orthodox Defense (20)
      • D61 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qc2 - Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation (30)
      • D62 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qc2 c5 8. cxd5 - Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Line (8)
      • D63 - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bd3 - Queen's Gambit Declined: Orthodox Defense, Pillsbury Variation (45)
      • D64 - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. a3 a6 9. Qc2 - Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack (2)
      • D65 - 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 a6 9. cxd5 - Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack (5)
      • D66 - 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 - Queen's Gambit Declined: Orthodox Defense, Bd3 Line (7)
      • D67 - 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 - Queen's Gambit Declined: Orthodox Defense, Capablanca System (8)
      • D68 - 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 - Queen's Gambit Declined: Orthodox Defense, Classical Vari (0)
      • D69 - 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5 - Queen's Gambit Declined: Orth (1)
    • D70-D79 1. d4 Nf6 2. c4 g6 3. f3 d5 Neo-Gruenfeld defence (667)
      • D70 - 1. d4 Nf6 2. c4 g6 3. f3 d5 - Neo-Grünfeld Defense (69)
      • D71 - 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 - Neo-Grünfeld Defense: Exchange Variation (31)
      • D73 - 1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. d4 Nf6 - Neo-Gruenfeld, 5.Nf3 (89)
      • D74 - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O - Neo-Grünfeld Defense: Delayed Exchange Variation (10)
      • D75 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. g3 d5 6. cxd5 Nxd5 7. Bg2 c5 8. O-O - Neo-Grünfeld Defense: Delayed Exchange Variation (10)
      • D75 - 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O c5 8. dxc5 - Neo-Grünfeld Defense: Delayed Exchange Variation (1)
      • D76a - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O Nb6 - Neo-Grünfeld Defense: Delayed Exchange Variation (89)
        • 8.Nc3 Nc6 (89)
          • D76c - 8...Nc6 (not 9.d5, 9.e3) (1)
          • D76d - 9.e3 (not 9...Re8, 9...e5) (3)
          • D76e - 9.e3 e5 (not 10.d5) (0)
          • D76e - 9.e3 e5 10.d5 (not 10...Na5) (4)
          • D76f - 9.e3 e5 10.d5 Na5 (4)
          • D76g - 9.e3 Re8 (not 10.d5) (42)
          • D76h - 9.e3 Re8 10.d5 (19)
          • D76i - 9.d5 (not 9...Na5) (0)
          • D76j - 9.d5 Na5 (not 10.e4) (9)
          • D76k - 9.d5 Na5 10.e4 (not 10...c6) (0)
          • D76k - 9.d5 Na5 10.e4 c6 (not 11.Bg5) (6)
          • D76l - 9.d5 Na5 10.e4 c6 11.Bg5 (1)
      • D76b - 8.Nc3 (not 8...Nc6) (0)
      • D77a - 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 - Neo-Grünfeld Defense: Classical Variation (81)
        • 6...dxc4 7.Na3 c3 (35)
          • D77h - (not 8.bxc3) (0)
          • D77h - 8.bxc3 c5 (not 9.e3) (14)
          • D77i - 8.bxc3 c5 9.e3 (21)
        • 6...dxc4 7.Na3 Nc6 (3)
          • D77j - 7...Nc6 (not 8.Nxc4) (0)
          • D77j - 8.Nxc4 (not 8...Be6) (0)
          • D77j - 8.Nxc4 Be6 (not 9.b3) (2)
          • D77k - 8.Nxc4 Be6 9.b3 (not 9...Bd5) (0)
          • D77l - 8.Nxc4 Be6 9.b3 Bd5 (1)
      • D77b - 6...e6 (8)
      • D77c - 6...c5 (not 7.dxc5) (0)
      • D77c - 6...c5 7.dxc5 dxc4 (3)
      • D77d - 6...Nc6 (4)
      • D77e - 6...dxc4 (not 7.Na3) (0)
      • D77f - 6...dxc4 7.Na3 (not 7...Na6) (21)
      • D77g - 6...dxc4 7.Na3 Na6 (3)
      • D78a - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c6 6. O-O d5 - Neo-Grünfeld Defense: Classical Variation, Original Defense (184)
        • 7.Qb3 dxc4 (15)
          • D78i - 7...dxc4 (not 8.Qxc4) (0)
          • D78j - 8.Qxc4 (15)
      • D78b - 7.Na3 (1)
      • D78c - 7.Ne5 (8)
      • D78d - 7.Qa4 (9)
      • D78e - 7.Nc3 (not 7...dxc4) (0)
      • D78f - 7.Nc3 dxc4 (3)
      • D78g - 7.Qb3 (not 7...Qb6) (12)
      • D78h - 7.Qb3 Qb6 (37)
      • D78k - 7.Nbd2 (not 7...Bf5, 7...Nbd7, 7...Ne4) (22)
      • D78l - 7.Nbd2 Nbd7 (2)
      • D78m - 7.Nbd2 Ne4 (1)
      • D78n - 7.Nbd2 Bf5 (11)
      • D78o - 7.b3 (not 7...Bf5, 7...Ne4) (20)
      • D78p - 7.b3 Bf5 (13)
      • D78q - 7.b3 Ne4 (15)
      • D79a - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c6 6. O-O d5 7. cxd5 cxd5 - Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation (103)
        • 8.Nc3 Nc6 (18)
          • D79f - 8...Nc6 (not 9.Ne5) (0)
          • D79g - 9.Ne5 (not 9...e6) (14)
          • D79h - 9.Ne5 e6 (4)
        • 8.Nc3 Ne4 (19)
          • D79d - 8...Ne4 (not 9.Ne5, 9.Nxe4) (0)
          • D79d - 9.Ne5 (16)
          • D79e - 9.Nxe4 (3)
        • 8.Ne5 e6 — Main Line (55)
          • D79i - 8...e6 (not 9.Nc3) (9)
          • D79j - 9.Nc3 — Main Line (16)
          • D79k - 9.Nc3 Nfd7 10.f4 (not 10...Nc6) (7)
          • D79l - 9.Nc3 Nfd7 10.f4 Nc6 (not 11.Be3) (2)
          • D79m - 9.Nc3 Nfd7 10.f4 Nc6 11.Be3 (not 11...Nb6, 11...f6) (0)
          • D79m - 9.Nc3 Nfd7 10.f4 Nc6 11.Be3 f6 — Main Line (12)
          • D79n - 9.Nc3 Nfd7 10.f4 Nc6 11.Be3 Nb6 (not 12.Bf2) (0)
          • D79n - 9.Nc3 Nfd7 10.f4 Nc6 11.Be3 Nb6 12.Bf2 — Main Line (9)
      • D79b - 8.Nc3 (not 8...e6) (2)
      • D79c - 8.Nc3 e6 (7)
      • D79i - 8.Ne5 (not 8...e6) (0)
    • D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5 (1224)
      • D80 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 - Grünfeld Defense (98)
      • D81 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3 - Grünfeld Defense: Russian Variation, Accelerated Variation (5)
      • D82 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 - Grünfeld Defense: Brinckmann Attack (29)
      • D83 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O - Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit (29)
      • D83 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. Rc1 O-O 6. e3 c5 7. dxc5 Qa5 - Grünfeld Defense: Brinckmann Attack, Reshevsky Gambit (1)
      • D84 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. cxd5 Nxd5 7. Nxd5 Qxd5 8. Bxc7 - Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit Accepted (10)
      • D85a - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5- Grünfeld Defense (435)
        • 5.e4 Nxc3 6.bxc3 Bg7 7.Qa4+ (2)
      • D85c - 7.Be3 (not 7...c6, 7...c5, 7...O-O, 8.Be2, 8.Be3, 8.Qd2, 8.Rb1) (22)
      • D85d - 7.Ba3 (not 7...c6, 7...c5, 7...O-O, 8.Be2, 8.Be3, 8.Qd2, 8.Rb1) (45)
      • D85e - 5.e4 Nxc3 6.bxc3 Bg7 7.Bb5+ (not 7...c6) (0)
      • D85e - 5.e4 Nxc3 6.bxc3 Bg7 7.Bb5+ c6 (not 8.Ba4) (0)
      • D85e - 5.e4 Nxc3 6.bxc3 Bg7 7.Bb5+ c6 8.Ba4 (not 8...O-O) (5)
      • D85f - 7...c6 8.Ba4 O-O (12)
      • D85g - 5.e4 Nxc3 6.bxc3 Bg7 7.Be3 - 7.Be3 (1)
      • D85g - 5.e4 Nxc3 6.bxc3 Bg7 7.Be3 c5 (not 8.Qd2) (2)
      • D85g - 7...c5 8.Qd2 (not 8...O-O, 8...Qa5) (0)
      • D85i - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 - Grünfeld Defense: Exchange Variation, Modern Exchange Variation (432)
        • 7...c5 8.Be2 O-O — Exchange (12)
          • D85l - 8...O-O (not 9.O-O) (0)
          • D85l - 9.O-O (not 9...Nc6, 9...b6) (0)
          • D85l - 9.O-O b6 (0)
          • D85l - 9.O-O Nc6 (12)
        • 7...c5 8.Be3 O-O — Exchange (12)
          • D85w - (not 9.Rc1) (8)
          • D85y - 9.Rc1 Qa5 10.Qd2 cxd4 11.cxd4 Qxd2+ 12.Nxd2 (4)
        • 7...c5 8.Be3 Qa5 — Exchange (71)
          • D85u - 8...Qa5 (not 9.Qd2) (0)
          • D85u - 9.Qd2 (59)
          • D85v - 9.Qd2 Nc6 10.Rc1 (12)
        • 7...c5 8.Qd2 O-O — Exchange (28)
          • D85g - 8...O-O (not 9.Rc1) (1)
          • D85g - 9.Rc1 (27)
        • 7...c5 8.Qd2 Qa5 — Exchange (32)
          • D85h - 8...Qa5 (not 9.Rb1, 9.Rc1) (0)
          • D85h - 9.Rb1 (not 9...b6) (0)
          • D85h - 9.Rb1 b6 (20)
          • D85h - 9.Rc1 (12)
        • 7...c5 8.Rb1 O-O — Exchange (111)
          • D85m - 8...O-O (not 9.Be2) (0)
          • D85m - 9.Be2 (not 9...Nc6, 9...Qa5, 9...b6, 9...cxd4) (0)
          • D85m - 9.Be2 Qa5 (10)
          • D85n - 9.Be2 b6 (17)
          • D85o - 9.Be2 Nc6 (3)
          • D85p - 9.Be2 Nc6 10.d5 Ne5 11.Nxe5 Bxe5 12.Qd2 (not 12...e6) (0)
          • D85p - 9.Be2 Nc6 10.d5 Ne5 11.Nxe5 Bxe5 12.Qd2 e6 — Main Line (5)
          • D85q - 9.Be2 cxd4 (not 10.cxd4) (0)
          • D85q - 9.Be2 cxd4 10.cxd4 (not 10...Qa5+) (0)
          • D85q - 9.Be2 cxd4 10.cxd4 Qa5+ (not 11.Bd2, 11.Qd2) (0)
          • D85q - 9.Be2 cxd4 10.cxd4 Qa5+ 11.Qd2 (8)
          • D85r - 9.Be2 cxd4 10.cxd4 Qa5+ 11.Bd2 (17)
          • D85s - 9.Be2 cxd4 10.cxd4 Qa5+ 11.Bd2 Qxa2 12.O-O Bg4 (not 13.Bg5) (0)
          • D85s - 9.Be2 cxd4 10.cxd4 Qa5+ 11.Bd2 Qxa2 12.O-O Bg4 13.Bg5 (51)
      • D85i - 7...O-O (4)
      • D85j - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 - Grünfeld Defense: Exchange Variation, Modern Exchange Variation (27)
        • 8.h3 (2)
      • D85k - 8.Bb5+ - Modern Exchange Variation (41)
      • D85l - 7...c5 8.Be2 (not 8...O-O) (0)
      • D85m - 8.Rb1 (2)
      • D85t - 7...c5 8.Be3 Bg4 (15)
      • D85t - 7...c5 8.Be3 Nc6 (0)
      • D85t - 8.Be3 - Modern Exchange Variation (2)
      • D86 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 - Grünfeld Defense: Exchange Variation, Classical Variation (20)
      • D87 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O Grünfeld Defense: Exchange Variation, Spassky Variation| (69)
        • D87a - 8...O-O - 8…c5 (46)
        • D87l - 12.Qd2 (3)
        • D87m - 12.Bf4 (4)
        • D87o - 12.Bd5 (3)
        • D87p - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bg4 11. f3 Na5 12. Bxf7+ - Grünfeld Defense: Exchange Variation, Seville Variation (23)
      • D88 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O cxd4 11. cxd4 - Grünfeld Defense: Exchange Variation, Spassky Variation (7)
      • D89b - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bg4 11. f3 Na5 12. Bd3 cxd4 13. cxd4 Be6 - Grünfeld Defense: Exchange Variation, Spassky (5)
        • 14.d5 Bxa1 — Exchange (1)
          • D89h - 15.Qxa1 f6 16.Rb1 — Main Line (1)
          • D89i - 15.Qxa1 f6 16.Bh6 — Main Line (0)
        • 14.Rc1 Bxa2 — Exchange (0)
          • D89d - 17.Qb4 (not 17...b6, 17...e6) (0)
          • D89e - 15.Qa4 Be6 16.d5 Bd7 17.Qb4 b6 (0)
          • D89f - 15.Qa4 Be6 16.d5 Bd7 17.Qb4 e6 (0)
      • D89c - 14.Rc1 (not 14...Bxa2) (2)
      • D89g - 14.d5 (not 14...Bxa1) (2)
      • D90 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 - Grünfeld Defense: Three Knights Variation (97)
      • D91a - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 - Grünfeld Defense: Three Knights Variation, Petrosian System (69)
        • 5...Ne4 6.Bh4 Nxc3 (8)
          • D91f - (not 7.bxc3) (2)
          • D91g - 7.bxc3 dxc4 (6)
        • 5...Ne4 6.cxd5 Nxg5 (13)
          • D91i - (not 7.Nxg5) (0)
          • D91j - 7.Nxg5 c6 (2)
          • D91k - 7.Nxg5 e6 (not 8.Nf3, 8.Qd2) (0)
          • D91l - 7.Nxg5 e6 8.Qd2 (not 8...exd5) (3)
          • D91m - 7.Nxg5 e6 8.Qd2 exd5 (1)
          • D91n - 7.Nxg5 e6 8.Qd2 exd5 9.Qe3+ Kf8 10.Qf4 Bf6 11.h4 h6 (1)
          • D91o - 7.Nxg5 e6 8.Nf3 (0)
          • D91p - 7.Nxg5 e6 8.Nf3 exd5 9.e3 (not 9...O-O) (1)
          • D91q - 7.Nxg5 e6 8.Nf3 exd5 9.e3 O-O (not 10.Bd3, 10.Be2, 10.b4) (0)
          • D91r - 7.Nxg5 e6 8.Nf3 exd5 9.e3 O-O 10.Bd3 (not 10...c6) (0)
          • D91r - 7.Nxg5 e6 8.Nf3 exd5 9.e3 O-O 10.Bd3 c6 (1)
          • D91s - 7.Nxg5 e6 8.Nf3 exd5 9.e3 O-O 10.Be2 (not 10...c6) (0)
          • D91s - 7.Nxg5 e6 8.Nf3 exd5 9.e3 O-O 10.Be2 c6 (0)
          • D91t - 7.Nxg5 e6 8.Nf3 exd5 9.e3 O-O 10.b4 (not 10...c6) (0)
          • D91t - 7.Nxg5 e6 8.Nf3 exd5 9.e3 O-O 10.b4 c6 (4)
      • D91a - 5...c6 (1)
      • D91b - 5...dxc4 (not 6.e4) (0)
      • D91c - 5...dxc4 6.e4 (5)
      • D91d - 5...Ne4 (not 6.Bf4, 6.Bh4, 6.cxd5) (0)
      • D91d - 5...Ne4 6.Bf4 (36)
      • D91e - 5...Ne4 6.Bh4 (not 6...Nxc3) (1)
      • D91h - 5...Ne4 6.cxd5 (not 6...Nxg5) (0)
      • D92 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 - Grünfeld Defense: Three Knights Variation, Hungarian Attack (20)
      • D93 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O-O 6. e3 - Grünfeld Defense: Three Knights Variation, Hungarian Variation (33)
      • D94 - 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4.... - Grünfeld Defense (148)
      • D94 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 - Grünfeld Defense: Three Knights Variation, Burille Variation (6)
        • D94 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O - Grünfeld Defense: Three Knights Variation, Burille Variation (4)
          • D94 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd2 (3)
          • D94 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. cxd5 - Grünfeld Defense: Three Knights Variation, Burille Variation (1)
      • D95f - 8.Bd3 (3)
      • D95i - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. Qb3 dxc4 6. Bxc4 O-O 7. Nf3 Nbd7 8. Ng5 - Grünfeld Defense: Pachman Variation (3)
      • D96 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 - Grünfeld Defense: Russian Variation (6)
      • D97a - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 - Grünfeld Defense: Russian Variation (109)
        • 7...a6 8.e5 b5 (17)
          • D97i - 9.Qb3 (not 9...Nfd7) (0)
          • D97j - 9...Nfd7 (not 10.Be3) (14)
          • D97k - 9.Qb3 Nfd7 10.Be3 (3)
      • D97a - 7...Nfd7 (8)
      • D97b - 7...b6 (0)
      • D97c - 7...c6 (not 8.Be2) (0)
      • D97c - 7...c6 8.Be2 (5)
      • D97d - 7...a6 (not 8.Be2, 8.Qb3, 8.e5) (4)
      • D97e - 7...a6 8.Be2 (not 8...b5) (0)
      • D97f - 7...a6 8.Be2 b5 9.Qb3 (29)
      • D97g - 7...a6 8.Qb3 (3)
      • D97h - 7...a6 8.e5 (not 8...b5) (3)
      • D97l - 7...Nc6 (not 8.Be2) (0)
      • D97l - 7...Nc6 8.Be2 (16)
      • D97m - 7...Na6 (not 8.Be2, 8.Bf4) (1)
      • D97n - 7...Na6 8.Bf4 (4)
      • D97o - 7...Na6 8.Be2 (not 8...c5) (11)
      • D97p - 7...Na6 8.Be2 c5 9.d5 e6 10.O-O exd5 11.exd5 Bf5 (8)
      • D98 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 - Grünfeld Defense: Russian Variation, Smyslov Variation (15)
        • 8.Be2 Nc6 (4)
          • D98c - 8...Nc6 (not 9.d5) (0)
          • D98d - 9.d5 (4)
        • 8.Be3 Nfd7 (10)
          • D98f - 8...Nfd7 (not 9.Be2, 9.O-O-O, 9.Rd1) (0)
          • D98g - 9.Be2 (2)
          • D98h - 9.Be2 Nb6 10.Qd3 Nc6 11.O-O-O (0)
          • D98i - 9.O-O-O (4)
          • D98j - 9.Rd1 (not 9...Nc6) (0)
          • D98k - 9.Rd1 Nc6 (4)
        • D98b - 8.Be2 (not 8...Nc6) (0)
        • D98e - 8.Be3 (not 8...Nfd7) (1)
      • D99 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 - Grünfeld Defense: Russian Variation, Smyslov Variation (10)
        • 9...Nb6 10.Rd1 Nc6 — Main Line (3)
          • D99f - (not 11.d5) — Main Line (1)
          • D99g - 11.d5 Ne5 — Main Line (2)
        • D99b - 9...c5 (2)
        • D99c - 9...Nb6 (not 10.Rd1) (1)
        • D99d - 9...Nb6 10.Rd1 (not 10...e6) (0)
        • D99e - 9...Nb6 10.Rd1 e6 (4)
  • SÉRIE E (8928)
    • E00a - 3.g4 - Devin Gambit (6)
    • E00b - 3...d5 (1)
    • E00b - 3.a3 (not 3...d5) (0)
    • E00c - 3.Bg5 - Neo-Indian (Seirawan) Attack (8)
    • E00d - 3.Nc3 (not 3...b6, 3...c5) (1)
    • E00e - 3...b6 4.e4 (0)
    • E00e - 3.Nc3 b6 (not 4.e4) (0)
    • E00f - 3...c5 (1)
    • E00g - 1. d4 Nf6 2. c4 e6 3. g3 - Catalan Opening (201)
      • 3...Bb4+ 4.Bd2 Qe7 (3)
        • E00m - 4...Qe7 (not 5.Bg2) (0)
        • E00m - 5.Bg2 (3)
      • 3...d5 4.Nf3 Bb4+ (95)
        • E00r - 5.Bd2 (95)
      • 3...d5 4.Nf3 dxc4 (3)
        • E00t - 4...dxc4 (not 5.Qa4+) (0)
        • E00u - 5.Qa4+ (not 5...Nbd7) (2)
        • E00v - 5.Qa4+ Nbd7 (1)
      • 3.Qb3 (0)
      • E00 - 1. d4 Nf6 2. c4 e6 3. g3 - Catalan Opening (24)
        • E00g - 3...e5 - Hungarian Gambit (3)
        • E00h - 3...c5 (19)
        • E00i - 3...Bb4+ (2)
    • E00g - 3...c6 (0)
    • E00h - 3...c5 4.Nf3 (2)
    • E00i - 3...Bb4+ 4.Nd2 (16)
    • E00j - 3.g3 Bb4+ 4.Bd2 (not 4...Bxd2+) (13)
    • E00k - 3...Bb4+ 4.Bd2 Bxd2+ (17)
    • E00l - 4...Be7 - Retreat Variation (3)
    • E00n - 3...d5 (not 4.Nf3) (0)
    • E00p - 3...d5 4.Nf3 c6 (0)
    • E00q - 3...d5 4.Nf3 c5 (3)
    • E00r - 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. d4 Bb4 - Bogo-Indian Defense: Retreat Variation (20)
      • 5.Bd2 Be7 6.Bg2 c6 (3)
      • 5.Bd2 Be7 6.Bg2 Nbd7 (3)
    • E00s - 3...d5 4.Nf3 Be7 (0)
    • E01-E09 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Catalan, closed (1277)
      • 9.Bf4 (1)
      • E01 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 - Catalan Opening: Closed (46)
      • E02 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 - Catalan Opening: Open Defense (10)
      • E03 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 - Catalan Opening: Open Defense (26)
      • E04a - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 - Catalan Opening: Open Defense (344)
        • 5...a6 6.O-O b5 (2)
          • E04g - 6...b5 (not 7.Ne5) (0)
          • E04g - 7.Ne5 (2)
          • E04h - 7.Ne5 Nd5 8.a4 (0)
        • 5...a6 6.O-O Nc6 (166)
          • E04i - 5...a6 6.O-O Nc6 (not 7.e3) (21)
          • E04j - 7.e3 (28)
          • E04l - 5...c5 6.O-O Nc6 (not 7.Ne5, 7.Qa4) (54)
          • E04m - 7.Ne5 (8)
          • E04n - 7.Ne5 Bd7 8.Na3 (not 8...cxd4) (0)
          • E04n - 7.Ne5 Bd7 8.Na3 cxd4 9.Naxc4 (19)
          • E04o - 5...c5 6.O-O Nc6 7.Qa4 (not 7...Bd7, 7...cxd4) (0)
          • E04o - 7.Qa4 cxd4 (7)
          • E04p - 5...c5 6.O-O Nc6 7.Qa4 Bd7 (not 8.Qxc4) (5)
          • E04q - 5...c5 6.O-O Nc6 7.Qa4 Bd7 8.Qxc4 (not 8...b5) (7)
          • E04r - 7.Qa4 Bd7 8.Qxc4 b5 (17)
        • 5...c6 - Open Defense (2)
        • 5...Nc6 6.O-O Rb8 (10)
          • E04t - 6...Rb8 (not 7.Nc3) (6)
          • E04u - 7.Nc3 (4)
      • E04a - 5...Bd7 - Open Defense (33)
      • E04b - 5...Bb4+ - Open Defense (42)
      • E04c - 5...Nbd7 (7)
      • E04d - 5...b5 (5)
      • E04e - 5...a6 (not 6.O-O) (16)
      • E04f - 5...a6 6.O-O (not 6...Nc6, 6...b5) (1)
      • E04k - 5...c5 (not 6.O-O) (6)
      • E04k - 5...c5 6.O-O (not 6...Nc6) (7)
      • E04s - 5...Nc6 (not 6.O-O, 6.Qa4) (3)
      • E04s - 5...Nc6 6.O-O (not 6...Rb8) (2)
      • E04v - 5...Nc6 6.Qa4 (not 6...Bb4+) (9)
      • E04w - 5...Nc6 6.Qa4 Bb4+ (33)
      • E05a - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 - Catalan Opening: Open Defense, Classical Line (539)
        • 6.Nc3 O-O (46)
          • E05c - 6...O-O (not 7.Ne5) (2)
          • E05d - 7.Ne5 (44)
        • 6.O-O O-O — Main Line (461)
          • E05g - 7.Ne5 (37)
          • E05h - 7.Ne5 Nc6 8.Nxc6 (11)
          • E05l - 7.Qc2 a6 8.a4 Bd7 (not 9.Qxc4) (34)
          • E05m - 7.Qc2 a6 8.a4 Bd7 9.Qxc4 (not 9...Bc6) (0)
          • E05m - 7.Qc2 a6 8.a4 Bd7 9.Qxc4 Bc6 (90)
          • E05n - 7.Qc2 a6 8.a4 Bd7 9.Qxc4 Bc6 10.Bg5 Bd5 (51)
          • E05o - 7.Qc2 a6 8.a4 Bd7 9.Qxc4 Bc6 10.Bg5 a5 (14)
          • E05q - 7.Qc2 a6 8.Qxc4 b5 9.Qc2 Bb7 (not 10.Bd2, 10.Bf4, 10.Bg5) (0)
          • E05r - 7.Qc2 a6 8.Qxc4 b5 9.Qc2 Bb7 10.Bg5 (16)
          • E05s - 7.Qc2 a6 8.Qxc4 b5 9.Qc2 Bb7 10.Bd2 (not 10...Be4) (47)
          • E05t - 7.Qc2 a6 8.Qxc4 b5 9.Qc2 Bb7 10.Bd2 Be4 (53)
          • E05u - 7.Qc2 a6 8.Qxc4 b5 9.Qc2 Bb7 10.Bf4 (not 10...Nc6) (6)
          • E05v - 7.Qc2 a6 8.Qxc4 b5 9.Qc2 Bb7 10.Bf4 Nc6 (not 11.Rd1) (0)
          • E05v - 7.Qc2 a6 8.Qxc4 b5 9.Qc2 Bb7 10.Bf4 Nc6 11.Rd1 (10)
      • E05b - 6.Nc3 (not 6...O-O) (0)
      • E05e - 6.O-O (not 6...O-O) (0)
      • E05f - E05 – 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. ... (43)
        • 7.Ne5 Nc6 8.Bxc6 (3)
        • 7.Qa4 a6 8.Qxc4 - 8.Qxc4 (7)
      • E05i - 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 (68)
        • 7...c6 (1)
      • E05j - 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 a6 (53)
        • 8.a4 - 8.a4 (44)
        • 8.Rd1 (1)
      • E05k - 8.a4 - 8.a4 (4)
      • E05p - 8.Qxc4 - 8.Qxc4 (1)
      • E06 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 - Catalan Opening: Closed (150)
        • E06 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O - Catalan Opening: Closed (24)
          • E06 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O - Catalan Opening: Closed (1)
          • E06 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. Qc2 - Catalan Opening: Closed (1)
          • E06 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. Nbd2 - Catalan Opening: Closed (1)
          • E06 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. Nc3 - Catalan Opening: Closed (17)
            • E06 - 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 O-O 6. Nc3 dxc4 - Catalan Opening: Closed (8)
            • E06 - 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. c4 Be7 5. d4 O-O 6. Nc3 Nbd7 - Catalan Opening: Closed (8)
          • E06 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. Qd3 - Catalan Opening: Closed (3)
          • E06 - 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. c4 Be7 5. d4 O-O 6. Nc3 - Catalan Opening: Closed (17)
          • E06 - 1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 4. c4 Be7 5. d4 O-O 6. b3 - Catalan Opening: Closed (1)
      • E07 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 - Catalan Opening: Closed (31)
      • E08a - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 - Catalan Opening: Closed (113)
        • 7...c6 8.b3 b6 (24)
          • E08m - 8...b6 (not 9.Rd1) (2)
          • E08n - 9.Rd1 (not 9...Ba6, 9...Bb7) (0)
          • E08n - 9.Rd1 Ba6 (not 10.Nbd2) (9)
          • E08o - 9.Rd1 Ba6 10.Nbd2 (4)
          • E08p - 9.Rd1 Bb7 (not 10.Nc3) (0)
          • E08p - 9.Rd1 Bb7 10.Nc3 (not 10...Rc8, 10...b5) (0)
          • E08p - 9.Rd1 Bb7 10.Nc3 b5 (3)
          • E08q - 9.Rd1 Bb7 10.Nc3 Rc8 (not 11.e4) (0)
          • E08q - 9.Rd1 Bb7 10.Nc3 Rc8 11.e4 (not 11...dxe4) (4)
          • E08r - 9.Rd1 Bb7 10.Nc3 Rc8 11.e4 dxe4 (2)
        • 7...c6 8.Rd1 b6 (2)
          • E08f - 8...b6 (not 9.a4) (0)
          • E08f - 9.a4 (2)
      • E08b - 7...c5 (2)
      • E08c - 7...b6 (1)
      • E08d - 7...c6 (not 8.Bf4, 8.Rd1, 8.b3) (1)
      • E08e - 7...c6 8.Rd1 (not 8...b6) (1)
      • E08g - 7...c6 8.Bf4 (not 8...Ne4, 8...Nh5, 8...b6) (17)
      • E08h - 7...c6 8.Bf4 Nh5 (2)
      • E08i - 7...c6 8.Bf4 Ne4 (14)
      • E08j - 7...c6 8.Bf4 b6 (43)
      • E08k - 7...c6 8.b3 (not 8...b5) (1)
      • E08l - 7...c6 8.b3 b5 (0)
      • E09a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 - Catalan Opening: Closed, Main Line (17)
        • 8...b6 9.b3 Bb7 — Main Line (1)
          • E09e - 9...Bb7 (not 10.Bb2) (0)
          • E09f - 10.Bb2 (not 10...Rc8) (0)
          • E09g - 10.Bb2 Rc8 — Main Line (1)
        • 8...b6 9.e4 Ba6 — Main Line (0)
          • E09i - 10.b3 — Main Line (0)
          • E09i - 9...Ba6 (not 10.b3) (0)
        • 8...b6 9.e4 Bb7 — Main Line (9)
          • E09l - 9...Bb7 (not 10.b3, 10.e5) (2)
          • E09m - 10.e5 — Main Line (4)
          • E09n - 10.b3 — Main Line (1)
          • E09o - 10.b3 Rc8 11.Bb2 (not 11...Qc7, 11...c5) (1)
          • E09p - 10.b3 Rc8 11.Bb2 Qc7 — Main Line (0)
          • E09q - 10.b3 Rc8 11.Bb2 c5 — Main Line (1)
        • 8...b6 9.e4 dxe4 — Main Line (2)
          • E09j - (not 10.Nxe4) — Main Line (0)
          • E09k - 10.Nxe4 Nxe4 11.Qxe4 — Main Line (2)
      • E09b - 8...b5 (0)
      • E09c - 8...Re8 (0)
      • E09d - 8...b6 (not 9.b3, 9.e4) (0)
      • E09e - 8...b6 9.b3 (not 9...a5, 9...Bb7) (0)
      • E09e - 8...b6 9.b3 a5 10.Bb2 Ba6 (0)
      • E09h - 8...b6 9.e4 (not 9...Ba6, 9...Bb7, 9...dxe4) (3)
    • E10a - 1. d4 Nf6 2. c4 e6 3. Nf3 - Indian Defense: Anti-Nimzo-Indian (72)
      • 3...c5 - Blumenfeld/Benoni (2)
      • 3...c5 4.d5 b5 (15)
        • E10k - 4...b5 (not 5.Bg5, 5.dxe6) (0)
        • E10k - 5.dxe6 (not 5...fxe6) (0)
        • E10k - 5.dxe6 fxe6 6.cxb5 (not 6...d5) (3)
        • E10l - 5.dxe6 fxe6 6.cxb5 d5 (2)
        • E10m - 5.Bg5 (not 5...Qa5+, 5...exd5, 5...h6) (3)
        • E10n - 5.Bg5 h6 (2)
        • E10o - 5.Bg5 Qa5+ (0)
        • E10p - 5.Bg5 exd5 (3)
        • E10q - 5.Bg5 exd5 6.cxd5 h6 (2)
      • 3...d5 4.e3 Nbd7 5.Nc3 a6 6.b3 (1)
      • 3...d5 4.g3 (1)
      • 3...Ne4 (0)
      • 3.Nf3 (not 3...Ne4, 3...Be7, 3...a6, 3...c5, 4.d5) (0)
      • E10 – 1. d4 Nf6 2. c4 e6 3. Nf3 ... – Indian Defense: Anti-Nimzo-Indian (8)
        • E10g - 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4.... - Benoni Defense (70)
    • E10c - 3...Be7 (0)
    • E10d - 3...a6 (not 4.Nc3) (5)
    • E10e - 3...a6 4.Nc3 (not 4...c5) (12)
    • E10f - 3...a6 4.Nc3 c5 (1)
    • E10h - 3...c5 4.e3 (not 4...b6, 4...cxd4) (4)
    • E10i - 3...c5 4.e3 b6 (2)
    • E10j - 3...c5 4.e3 cxd4 (2)
    • E11a - 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ - Bogo-Indian Defense (686)
      • 4.Bd2 a5 (43)
        • E11l - 5.Nc3 (24)
        • E11m - 5.g3 (19)
      • 4.Bd2 Be7 (232)
        • E11g - 5...d5 (not 6.Bg2) (0)
        • E11g - 5.g3 (not 5...d5) (0)
        • E11g - 5.g3 d5 6.Bg2 (23)
        • E11i - 5...d5 6.Bg2 O-O 7.O-O c6 8.Qc2 (not 8...b6) (0)
        • E11i - 5...d5 6.Bg2 O-O 7.O-O c6 8.Qc2 b6 (not 9.Bf4) (0)
        • E11i - 5.g3 d5 6.Bg2 O-O 7.O-O c6 8.Qc2 b6 9.Bf4 (86)
      • 4.Bd2 Bxd2+ (56)
        • E11y - 5...O-O (not 6.Nc3) (0)
        • E11y - 5...O-O 6.Nc3 (not 6...d5) (0)
        • E11y - 5...O-O 6.Nc3 d5 (not 7.e3) (28)
        • E11y - 5.Qxd2 (not 5...O-O) (0)
        • E11z - 5.Qxd2 O-O 6.Nc3 d5 7.e3 (28)
      • 4.Bd2 c5 (58)
        • E11k - 5.Bxb4 cxb4 6.g3 (28)
      • 4.Bd2 Qe7 — Main Line (83)
        • (not 5.Nc3, 5.g3) (1)
        • E11o - 5.Nc3 (4)
        • E11q - 5.g3 O-O (not 6.Bg2) (0)
        • E11q - 5.g3 O-O 6.Bg2 (7)
        • E11r - 5.g3 Nc6 (not 6.Bg2, 6.Nc3) (0)
        • E11r - 5.g3 Nc6 6.Nc3 (not 6...Bxc3) (15)
        • E11s - 5.g3 Nc6 6.Nc3 Bxc3 (not 7.Bxc3) (0)
        • E11s - 5.g3 Nc6 6.Nc3 Bxc3 7.Bxc3 (not 7...Ne4) (0)
        • E11s - 5.g3 Nc6 6.Nc3 Bxc3 7.Bxc3 Ne4 (not 8.Rc1) (0)
        • E11s - 5.g3 Nc6 6.Nc3 Bxc3 7.Bxc3 Ne4 8.Rc1 (14)
        • E11t - 5.g3 Nc6 6.Bg2 (not 6...Bxd2+) (0)
        • E11t - 5.g3 Nc6 6.Bg2 Bxd2+ (not 7.Nbxd2) (2)
        • E11u - 5.g3 Nc6 6.Bg2 Bxd2+ 7.Nbxd2 (1)
        • E11v - 5.g3 Nc6 6.Bg2 Bxd2+ 7.Nbxd2 d6 8.O-O (not 8...O-O, 8...a5) (0)
        • E11v - 5.g3 Nc6 6.Bg2 Bxd2+ 7.Nbxd2 d6 8.O-O O-O — Main Line (5)
        • E11w - 5.g3 Nc6 6.Bg2 Bxd2+ 7.Nbxd2 d6 8.O-O a5 (not 9.e4) (0)
        • E11w - 5.g3 Nc6 6.Bg2 Bxd2+ 7.Nbxd2 d6 8.O-O a5 9.e4 (not 9...e5) — Main Line (0)
        • E11w - 5.g3 Nc6 6.Bg2 Bxd2+ 7.Nbxd2 d6 8.O-O a5 9.e4 e5 10.d5 Nb8 — Main Line (7)
      • 4.Bd2 Qe7 5.e3 (2)
      • 4.Nbd2 b6 (57)
        • E11c - 4...b6 (not 5.a3) (0)
        • E11c - 5.a3 (not 5...Bxd2+) (0)
        • E11c - 5.a3 Bxd2+ (not 6.Bxd2) (43)
        • E11d - 5.a3 Bxd2+ 6.Bxd2 (not 6...Bb7) (0)
        • E11d - 5.a3 Bxd2+ 6.Bxd2 Bb7 (14)
      • 4.Nbd2 O-O (62)
        • E11e - 4...O-O (not 5.a3) (6)
        • E11f - 5.a3 (not 5...Be7, 5...Bxd2+) (0)
        • E11f - 5.a3 Be7 (not 6.e4) (0)
        • E11f - 5.a3 Be7 6.e4 d5 (56)
        • E11f - 5.a3 Bxd2+ (0)
    • E11a - 3.Nf3 Bb4+ 4.Nbd2 (not 4...d5) (31)
    • E11b - 4.Nbd2 d5 (19)
    • E11g - 3.Nf3 Bb4+ 4.Bd2 (not 4...Be7, 4...a5, 4...c5) (0)
    • E11g - 4.Bd2 Be7 (2)
    • E11h - 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O (14)
      • E11 - 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. d4 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O Nbd7 (8)
        • 8.b4 - Retreat Variation (1)
        • 8.Qc2 c6 (7)
    • E11h - 7.O-O c6 - 4.Bd2 Be7 5.g3 d5 6.Bg2 O-O 7.O-O c6 (129)
    • E11j - 4.Bd2 c5 - Vitolins Variation (32)
    • E11l - 4.Bd2 a5 (1)
    • E11p - 4.Bd2 Qe7 5.g3 - 5.g3 (37)
    • E11x - 4.Bd2 Bxd2+ (7)
    • E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence (1965)
      • E12a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 - Queen's Indian Defense (506)
        • 4.a3 Ba6 (53)
          • E12g - 4...Ba6 (not 5.Qc2, 5.e3) (0)
          • E12g - 5.e3 (0)
          • E12g - 5.Qc2 (not 5...Bb7, 5...c5) (0)
          • E12g - 5.Qc2 c5 (8)
          • E12h - 5.Qc2 Bb7 (not 6.Nc3) (0)
          • E12h - 5.Qc2 Bb7 6.Nc3 c5 (not 7.e4) (14)
          • E12i - 5.Qc2 Bb7 6.Nc3 c5 7.e4 (not 7...cxd4) (0)
          • E12i - 5.Qc2 Bb7 6.Nc3 c5 7.e4 cxd4 8.Nxd4 Nc6 (31)
        • 4.a3 Bb7 (335)
          • E12j - (not 5.Nc3) (0)
          • E12j - 5.Nc3 Bxf3 (11)
          • E12l - 5.Nc3 g6 (16)
          • E12n - 5.Nc3 d5 6.Bg5 (not 6...Be7) (0)
          • E12n - 5.Nc3 d5 6.Bg5 Be7 (not 7.Qa4+) (28)
          • E12o - 5.Nc3 d5 6.Bg5 Be7 7.Qa4+ (not 7...c6) (0)
          • E12o - 5.Nc3 d5 6.Bg5 Be7 7.Qa4+ c6 (not 8.Bxf6) (0)
          • E12o - 5.Nc3 d5 6.Bg5 Be7 7.Qa4+ c6 8.Bxf6 Bxf6 9.cxd5 exd5 (35)
          • E12p - 5.Nc3 d5 6.cxd5 exd5 (not 7.Bg5, 7.g3) (0)
          • E12p - 5.Nc3 d5 6.cxd5 exd5 7.g3 (38)
          • E12q - 5.Nc3 d5 6.cxd5 exd5 7.Bg5 (3)
          • E12r - 5.Nc3 d5 6.cxd5 Nxd5 7.e4 (19)
          • E12s - 5.Nc3 d5 6.cxd5 Nxd5 7.e3 Be7 (67)
          • E12s - 5.Nc3 d5 6.cxd5 Nxd5 7.e3 g6 (0)
          • E12t - 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 (not 7...Be7, 7...Nxc3, 7...c5) (0)
          • E12t - 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 Be7 (0)
          • E12t - 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 c5 (0)
          • E12t - 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 Nxc3 (not 8.bxc3) (32)
          • E12u - 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 Nxc3 8.bxc3 (not 8...Be7, 8...c5) (0)
          • E12u - 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 Nxc3 8.bxc3 Be7 (not 9.e4) (0)
          • E12u - 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 Nxc3 8.bxc3 Be7 9.e4 (49)
          • E12u - 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 Nxc3 8.bxc3 c5 (not 9.e4) (0)
          • E12u - 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 Nxc3 8.bxc3 c5 9.e4 (0)
        • 4.a3 c5 (15)
          • E12e - 4...c5 (not 5.d5) (0)
          • E12e - 5.d5 (not 5...Ba6) (0)
          • E12e - 5.d5 Ba6 (not 6.Qc2) (5)
          • E12f - 5.d5 Ba6 6.Qc2 (not 6...exd5) (0)
          • E12f - 5.d5 Ba6 6.Qc2 exd5 7.cxd5 g6 (10)
        • 4.Bf4 Bb7 (26)
          • E12b - 5...Be7 (not 6.h3) (0)
          • E12b - 5.e3 Be7 6.h3 (16)
          • E12c - 5...Bb4+ (not 6.Nbd2, 6.Nfd2) (0)
          • E12c - 5.e3 Bb4+ 6.Nbd2 (10)
          • E12c - 5.e3 Bb4+ 6.Nfd2 (0)
        • 4.Nc3 Bb7 (50)
          • E12w - 4...Bb7 (not 5.Bg5) (0)
          • E12w - 5.Bg5 (46)
          • E12y - 5.Bg5 h6 6.Bh4 g5 (not 7.Bg3) (0)
          • E12y - 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5 8.e3 (0)
          • E12y - 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5 8.Qc2 (4)
      • E12b - 4.Bf4 - Miles Variation (1)
      • E12d - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 - Queen's Indian Defense: Petrosian Variation (22)
        • 4...c6 - Petrosian Variation (1)
      • E12j - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 - Queen's Indian Defense: Kasparov-Petrosian Variation (15)
        • 5...d6 - Kasparov-Petrosian Variation (1)
      • E12j - 5...Be7 - 5.Nc3 Be7 (1)
      • E12k - 5...Ne4 - 5.Nc3 Ne4 (25)
      • E12m - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 (25)
        • 6.Bf4 - Main Line (1)
        • 6.Qa4+ - Main Line (2)
        • 6.Qc2 - Main Line (1)
      • E12r - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 - Queen's Indian Defense: Kasparov-Petrosian Variation, Modern Variation (3)
        • 7.Bd2 (1)
        • 7.Nxd5 - Modern Variation (1)
      • E12s - 7.e3 - 6.cxd5 Nxd5 7.e3 (1)
      • E12v - 4.Bg5 (2)
      • E12w - 4.Nc3 (1)
      • E13 - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4.... - Queen's Indian Defense (62)
        • 4.Nc3 Bb7 (62)
          • E13a - 6...Bb4 (not 7.Nd2, 7.Qc2, 7.e3) (0)
          • E13b - 7.Qc2 (not 7...g5) (1)
          • E13c - 5.Bg5 h6 6.Bh4 Bb4 7.Qc2 g5 (2)
          • E13d - 7.Nd2 (not 7...Bxc3) (8)
          • E13e - 5.Bg5 h6 6.Bh4 Bb4 7.Nd2 Bxc3 8.bxc3 (6)
          • E13e - 7.Nd2 Bxc3 (not 8.bxc3) (0)
          • E13f - 7.e3 (not 7...Bxc3+, 7...c5, 7...g5) (0)
          • E13g - 5.Bg5 h6 6.Bh4 Bb4 7.e3 c5 (1)
          • E13h - 7.e3 Bxc3+ (not 8.bxc3) (0)
          • E13h - 7.e3 Bxc3+ 8.bxc3 (not 8...d6) (1)
          • E13i - 7.e3 Bxc3+ 8.bxc3 d6 (not 9.Nd2) (1)
          • E13j - 7.e3 Bxc3+ 8.bxc3 d6 9.Nd2 (not 9...Nbd7) (5)
          • E13k - 7.e3 Bxc3+ 8.bxc3 d6 9.Nd2 Nbd7 (not 10.f3) (0)
          • E13k - 7.e3 Bxc3+ 8.bxc3 d6 9.Nd2 Nbd7 10.f3 (not 10...Qe7) (2)
          • E13l - 5.Bg5 h6 6.Bh4 Bb4 7.e3 Bxc3+ 8.bxc3 d6 9.Nd2 Nbd7 10.f3 Qe7 (6)
          • E13m - 7.e3 g5 (not 8.Bg3) (0)
          • E13m - 7.e3 g5 8.Bg3 (not 8...Ne4) (0)
          • E13m - 7.e3 g5 8.Bg3 Ne4 (not 9.Qc2) (3)
          • E13n - 7.e3 g5 8.Bg3 Ne4 9.Qc2 (not 9...Bxc3+) (2)
          • E13o - 7.e3 g5 8.Bg3 Ne4 9.Qc2 Bxc3+ (not 10.bxc3) (0)
          • E13o - 7.e3 g5 8.Bg3 Ne4 9.Qc2 Bxc3+ 10.bxc3 (not 10...d6) (8)
          • E13p - 7.e3 g5 8.Bg3 Ne4 9.Qc2 Bxc3+ 10.bxc3 d6 (not 11.Bd3) (0)
          • E13p - 7.e3 g5 8.Bg3 Ne4 9.Qc2 Bxc3+ 10.bxc3 d6 11.Bd3 (not 11...f5) (2)
          • E13q - 5.Bg5 h6 6.Bh4 Bb4 7.e3 g5 8.Bg3 Ne4 9.Qc2 Bxc3+ 10.bxc3 d6 11.Bd3 f5 (14)
      • E14a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 - Queen's Indian Defense: Spassky System (116)
        • 4...Bb7 5.Bd3 Bb4+ (23)
          • E14f - 5...Bb4+ (not 6.Nbd2) (0)
          • E14g - 6.Nbd2 (not 6...O-O, 6...c5) (0)
          • E14g - 6.Nbd2 c5 (6)
          • E14h - 6.Nbd2 O-O (3)
          • E14i - 6.Nbd2 O-O 7.O-O d5 (not 8.a3) (0)
          • E14i - 6.Nbd2 O-O 7.O-O d5 8.a3 (not 8...Be7) (0)
          • E14i - 6.Nbd2 O-O 7.O-O d5 8.a3 Be7 (not 9.b4) (0)
          • E14i - 6.Nbd2 O-O 7.O-O d5 8.a3 Be7 9.b4 (14)
        • 4...Bb7 5.Bd3 Be7 (1)
          • E14j - 5...Be7 (not 6.O-O) (1)
          • E14k - 6.O-O (not 6...O-O) (0)
          • E14k - 6.O-O O-O (not 7.Nc3) (0)
          • E14l - 6.O-O O-O 7.Nc3 (0)
        • 4...Bb7 5.Bd3 c5 (33)
          • E14q - 5...c5 (not 6.Nc3, 6.O-O) (0)
          • E14q - 6.Nc3 (0)
          • E14r - 6.O-O (not 6...Be7, 6...cxd4) (5)
          • E14s - 6.O-O cxd4 (not 7.exd4) (0)
          • E14s - 6.O-O cxd4 7.exd4 (0)
          • E14t - 6.O-O Be7 (not 7.Nbd2, 7.b3) (2)
          • E14t - 6.O-O Be7 7.Nbd2 (0)
          • E14u - 6.O-O Be7 7.b3 (not 7...O-O) (0)
          • E14u - 6.O-O Be7 7.b3 O-O 8.Bb2 (not 8...cxd4, 8...d5) (0)
          • E14v - 6.O-O Be7 7.b3 O-O 8.Bb2 d5 (4)
          • E14w - 6.O-O Be7 7.b3 O-O 8.Bb2 cxd4 (not 9.Nxd4, 9.exd4) (0)
          • E14w - 6.O-O Be7 7.b3 O-O 8.Bb2 cxd4 9.exd4 (not 9...d5) (0)
          • E14w - 6.O-O Be7 7.b3 O-O 8.Bb2 cxd4 9.exd4 d5 (10)
          • E14w - 6.O-O Be7 7.b3 O-O 8.Bb2 cxd4 9.Nxd4 (0)
          • E14y - 6.O-O Be7 7.Nc3 cxd4 8.exd4 (not 8...d5) (5)
          • E14z - 6.O-O Be7 7.Nc3 cxd4 8.exd4 d5 (7)
        • 4...Bb7 5.Bd3 d5 (37)
          • E14m - 5...d5 (not 6.O-O) (13)
          • E14n - 6.O-O (not 6...Bd6) (0)
          • E14n - 6.O-O Bd6 (not 7.Nc3, 7.b3) (10)
          • E14o - 6.O-O Bd6 7.b3 (6)
          • E14p - 6.O-O Bd6 7.Nc3 (8)
      • E14a - 4...Bb4+ (0)
      • E14b - 4...Bb7 (not 5.Bd3, 5.Nc3) (0)
      • E14c - 4...Bb7 5.Nc3 (not 5...d5) (3)
      • E14d - 4...Bb7 5.Nc3 d5 (19)
      • E14e - 4...Bb7 5.Bd3 (not 5...Bb4+, 5...Be7, 5...c5, 5...d5) (0)
      • E15a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 - Queen's Indian Defense: Fianchetto Variation (769)
        • 4...Ba6 5.b3 b5 (28)
          • E15l - 5...b5 (not 6.cxb5) (0)
          • E15l - 6.cxb5 (28)
        • 4...Ba6 5.b3 Bb4+ — Main Line (292)
          • E15o - (not 6.Bd2) (0)
          • E15o - 6.Bd2 Be7 7.Nc3 (103)
          • E15p - 6.Bd2 Be7 7.Bg2 (not 7...c6, 7...d5) (0)
          • E15p - 6.Bd2 Be7 7.Bg2 d5 (not 8.cxd5) (0)
          • E15p - 6.Bd2 Be7 7.Bg2 d5 8.cxd5 exd5 9.O-O O-O (37)
          • E15q - 6.Bd2 Be7 7.Bg2 c6 (not 8.Bc3, 8.O-O) (0)
          • E15q - 6.Bd2 Be7 7.Bg2 c6 8.O-O (not 8...d5) (0)
          • E15q - 6.Bd2 Be7 7.Bg2 c6 8.O-O d5 (40)
          • E15r - 6.Bd2 Be7 7.Bg2 c6 8.Bc3 — Main Line (38)
          • E15s - 6.Bd2 Be7 7.Bg2 c6 8.Bc3 d5 9.Ne5 (not 9...Nfd7) (0)
          • E15s - 6.Bd2 Be7 7.Bg2 c6 8.Bc3 d5 9.Ne5 Nfd7 — Main Line (74)
        • 4...Ba6 5.b3 Bb7 (61)
          • E15n - 6.Bg2 (not 6...Bb4+) (0)
          • E15n - 6.Bg2 Bb4+ 7.Bd2 a5 (not 8.O-O) (0)
          • E15n - 6.Bg2 Bb4+ 7.Bd2 a5 8.O-O O-O (61)
        • 4...Ba6 5.b3 d5 (31)
          • E15m - 6.Bg2 (0)
          • E15m - 6.cxd5 (31)
        • 4...Ba6 5.Nbd2 Bb7 (40)
          • E15f - 5...Bb7 (not 6.Bg2) (0)
          • E15f - 6.Bg2 (not 6...c5) (0)
          • E15f - 6.Bg2 c5 (40)
        • 4...Ba6 5.Qa4 c5 (71)
          • E15j - (not 6.Bg2) (0)
          • E15j - 6.Bg2 Bb7 (not 7.O-O, 7.dxc5) (0)
          • E15j - 6.Bg2 Bb7 7.dxc5 (62)
          • E15k - 6.Bg2 Bb7 7.O-O (9)
        • 4...Ba6 5.Qa4 c6 (2)
          • E15i - (not 6.Nc3) (0)
          • E15i - 6.Nc3 b5 (2)
        • 4...Bb4+ 5.Bd2 Bxd2+ (18)
          • E15c - (not 6.Qxd2) (0)
          • E15c - 6.Qxd2 Ba6 (18)
        • 4...Bb7 5.Bg2 c5 (18)
          • E15u - (not 6.d5) (0)
          • E15u - 6.d5 exd5 7.Ng5 (10)
          • E15v - 6.d5 exd5 7.Nh4 (8)
        • 4...Bb7 5.Bg2 Qc8 (6)
          • E15t - (not 6.O-O) (0)
          • E15t - 6.O-O c5 7.d5 (6)
      • E15b - 4...Bb4+ (not 5.Bd2) (0)
      • E15b - 4...Bb4+ 5.Bd2 (not 5...Bxd2+) (9)
      • E15d - 4...Ba6 (not 5.Nbd2, 5.Qa4, 5.Qb3, 5.Qc2, 5.b3) (0)
      • E15d - 4...Ba6 5.Qb3 (112)
      • E15d - 4...Ba6 5.Qc2 - 5.Qc2 (1)
      • E15e - 4...Ba6 5.Nbd2 (not 5...Bb4, 5...c5) (2)
      • E15e - 4...Ba6 5.Nbd2 c5 (31)
      • E15g - 4...Ba6 5.Nbd2 Bb4 (28)
      • E15h - 4...Ba6 5.Qa4 (not 5...Be7) (2)
      • E15h - 4...Ba6 5.Qa4 Be7 (6)
      • E15l - 4...Ba6 5.b3 (not 5...Bb7, 5...d5) (0)
      • E15m - 4...Ba6 5.b3 d5 - 5.b3 d5 (2)
      • E15n - 4...Ba6 5.b3 Bb7 - 5.b3 Bb7 (1)
      • E15o - 4...Ba6 5.b3 Bb4+ 6.Bd2 Be7 - 5.b3 Bb4+ 6.Bd2 Be7 (2)
      • E15t - 4...Bb7 (not 5.Bg2) (0)
      • E15t - 4...Bb7 5.Bg2 (not 5...Qc8, 5...c5) (0)
      • E16a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ - Queen's Indian Defense: Capablanca Variation (162)
        • 6.Bd2 a5 — Capablanca (35)
          • E16f - (not 7.O-O) (5)
          • E16g - 7.O-O O-O (30)
        • 6.Bd2 Be7 — Capablanca (22)
          • E16j - 6...Be7 (not 7.Nc3) (2)
          • E16k - 7.Nc3 (not 7...O-O) (9)
          • E16l - 7.Nc3 O-O (not 8.O-O) (1)
          • E16m - 7.Nc3 O-O 8.O-O (not 8...d5) (8)
          • E16n - 7.Nc3 O-O 8.O-O d5 (2)
        • 6.Bd2 Bxd2+ — Capablanca (28)
          • E16o - 6...Bxd2+ (not 7.Nbxd2, 7.Qxd2) (0)
          • E16o - 7.Nbxd2 (4)
          • E16p - 7.Qxd2 (not 7...O-O) (1)
          • E16q - 7.Qxd2 O-O (not 8.Nc3, 8.O-O) (0)
          • E16q - 7.Qxd2 O-O 8.O-O (11)
          • E16r - 7.Qxd2 O-O 8.Nc3 (12)
        • 6.Bd2 Qe7 — Capablanca (5)
          • E16h - (not 7.O-O) (1)
          • E16i - 7.O-O Bxd2 8.Qxd2 (4)
        • 6.Nbd2 O-O — Capablanca (50)
          • E16c - (not 7.O-O) (8)
          • E16d - 7.O-O d5 (42)
      • E16b - 6.Nbd2 (not 6...O-O) (4)
      • E16e - 6.Bd2 (not 6...c5) (0)
      • E16e - 6.Bd2 c5 (16)
      • E17a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 - Queen's Indian Defense: Traditional Variation (143)
        • 6.Nc3 Ne4 (27)
          • E17g - 6...Ne4 (not 7.Bd2, 7.Qc2) (0)
          • E17g - 7.Qc2 (1)
          • E17h - 7.Bd2 (not 7...Bf6, 7...O-O, 7...f5) (7)
          • E17i - 7.Bd2 O-O (2)
          • E17j - 7.Bd2 f5 (7)
          • E17k - 7.Bd2 Bf6 (10)
        • 6.Nc3 O-O (15)
          • E17c - 6...O-O (not 7.Qc2) (3)
          • E17d - 7.Qc2 (not 7...c5, 7...d5) (2)
          • E17e - 7.Qc2 c5 (8)
          • E17f - 7.Qc2 d5 (2)
        • 6.O-O O-O (93)
          • E17n - 6...O-O (not 7.Qc2, 7.Re1, 7.b3, 7.d5) (8)
          • E17o - 7.Qc2 (0)
          • E17p - 7.Re1 (not 7...d5) (35)
          • E17q - 7.Re1 d5 (17)
          • E17r - 7.b3 (not 7...c5, 7...d5) (1)
          • E17s - 7.b3 c5 (0)
          • E17t - 7.b3 d5 (6)
          • E17u - 7.d5 (not 7...exd5) (0)
          • E17u - 7.d5 exd5 (not 8.Nd4, 8.Nh4) (2)
          • E17v - 7.d5 exd5 8.Nd4 (2)
          • E17w - 7.d5 exd5 8.Nh4 (not 8...c6) (0)
          • E17w - 7.d5 exd5 8.Nh4 c6 (8)
          • E17y - 7.d5 exd5 8.Nh4 c6 9.cxd5 Nxd5 10.Nf5 Nc7 (not 11.e4) (6)
          • E17z - 7.d5 exd5 8.Nh4 c6 9.cxd5 Nxd5 10.Nf5 Nc7 11.e4 (8)
      • E17b - 6.Nc3 (not 6...d5) (0)
      • E17b - 6.Nc3 d5 (0)
      • E17l - 6.O-O (not 6...d5) (4)
      • E17m - 6.O-O d5 (0)
      • E18a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 - Queen's Indian Defense: Classical Variation, Traditional Variation (143)
        • 7...d5 8.Ne5 Na6 (10)
          • E18j - (not 9.cxd5) (6)
          • E18k - 9.cxd5 exd5 (4)
        • 7...Ne4 8.Bd2 Bf6 (50)
          • E18q - 8...Bf6 (not 9.Rc1) (20)
          • E18r - 9.Rc1 (30)
        • 7...Ne4 8.Bd2 d5 (12)
          • E18n - (not 9.cxd5) (0)
          • E18n - 9.cxd5 exd5 (12)
        • 7...Ne4 8.Bd2 f5 (9)
          • E18o - 8...f5 (not 9.d5) (7)
          • E18p - 9.d5 (not 9...Bf6) (0)
          • E18p - 9.d5 Bf6 (not 10.Rc1) (0)
          • E18p - 9.d5 Bf6 10.Rc1 (2)
        • 7...Ne4 8.Nxe4 Bxe4 (34)
          • E18s - 9.Bf4 (4)
          • E18s - 9.d5 (0)
          • E18s - 9.Nh4 (0)
          • E18t - 9.Ne1 (8)
          • E18u - 9.Ne1 Bxg2 10.Nxg2 (not 10...d5) (0)
          • E18u - 9.Ne1 Bxg2 10.Nxg2 d5 (not 11.Qa4) (6)
          • E18v - 9.Ne1 Bxg2 10.Nxg2 d5 11.Qa4 (not 11...Qd7) (11)
          • E18w - 9.Ne1 Bxg2 10.Nxg2 d5 11.Qa4 Qd7 (5)
        • 7...Ne4 8.Qc2 Nxc3 — Main Line (2)
          • E18y - 8...Nxc3 (not 9.bxc3) (1)
          • E18z - 9.bxc3 — Main Line (1)
      • E18b - 7...c5 (0)
      • E18c - 7...d6 (0)
      • E18d - 7...Na6 (4)
      • E18e - 7...d5 (not 8.Ne5, 8.cxd5) (0)
      • E18e - 7...d5 8.cxd5 (not 8...exd5) (1)
      • E18f - 7...d5 8.cxd5 exd5 (5)
      • E18g - 7...d5 8.Ne5 (not 8...Nbd7, 8...c6) (0)
      • E18h - 7...d5 8.Ne5 c6 (3)
      • E18i - 7...d5 8.Ne5 Nbd7 (0)
      • E18l - 7...Ne4 (not 8.Bd2, 8.Nxe4, 8.Qc2) (0)
      • E18m - 7...Ne4 8.Bd2 (not 8...Bf6, 8...d5, 8...f5) (13)
      • E18s - 7...Ne4 8.Nxe4 (not 8...Bxe4) (0)
      • E18y - 7...Ne4 8.Qc2 (not 8...Nxc3) (0)
      • E19a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2 Nxc3 9. Qxc3 - Queen's Indian Defense: Classical Variation, Traditional Variation, Main Line (64)
        • 9...c5 10.Rd1 d6 — Main Line (36)
          • E19m - 10...d6 (not 11.b3) (9)
          • E19n - 11.b3 (not 11...Bf6) (5)
          • E19o - 11.b3 Bf6 (not 12.Bb2) (0)
          • E19o - 11.b3 Bf6 12.Bb2 (not 12...Qe7) (14)
          • E19p - 11.b3 Bf6 12.Bb2 Qe7 — Main Line (8)
      • E19b - 9...d6 (not 10.b3) (3)
      • E19c - 9...d6 10.b3 (5)
      • E19d - 9...Be4 (not 10.Ne1) (2)
      • E19e - 9...Be4 10.Ne1 (0)
      • E19f - 9...f5 (not 10.Rd1, 10.b3) (3)
      • E19g - 9...f5 10.Rd1 (1)
      • E19h - 9...f5 10.b3 (not 10...Bf6) (2)
      • E19i - 9...f5 10.b3 Bf6 11.Bb2 d6 (3)
      • E19j - 9...c5 (not 10.Rd1, 10.b3) (0)
      • E19k - 9...c5 10.b3 (6)
      • E19l - 9...c5 10.Rd1 (not 10...d6) (1)
    • E20-E59 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 Nimzo-Indian defence (2244)
      • E20 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 - Nimzo-Indian Defense (218)
        • E20 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 - Nimzo-Indian Defense: Kmoch Variation (7)
        • E20 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 - Nimzo-Indian Defense: Romanishin Variation (3)
      • E21 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 - Nimzo-Indian Defense: Three Knights Variation (127)
      • E22 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 - Nimzo-Indian Defense: Spielmann Variation (2)
      • E23 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 - Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit (1)
      • E24 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 - Nimzo-Indian Defense: Sämisch Variation (40)
      • E25 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 - Nimzo-Indian Defense: Sämisch Variation (34)
      • E26 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 - Nimzo-Indian Defense: Sämisch Variation (11)
        • E26 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 b6 - Nimzo-Indian Defense: Sämisch Variation, O'Kelly Variation (2)
      • E27 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O - Nimzo-Indian Defense: Sämisch Variation (14)
      • E28 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. a3 Bxc3+ 6. bxc3 - Nimzo-Indian Defense: Sämisch Variation (7)
      • E29 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. a3 Bxc3+ 7. bxc3 O-O - Nimzo-Indian Defense: Sämisch Variation (18)
      • E30 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 - Nimzo-Indian Defense: Leningrad Variation (7)
      • E31 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 d6 - Nimzo-Indian Defense: Leningrad Variation, Benoni Defense (13)
        • 7.e3 Bxc3+ — Main Line (9)
          • E31h - 7...Bxc3+ (not 8.bxc3) (0)
          • E31h - 8.bxc3 (not 8...Qe7, 8...e5) (0)
          • E31i - 8.bxc3 Qe7 — Main Line (3)
          • E31j - 8.bxc3 e5 (not 9.Bd3, 9.Nf3, 9.Qc2, 9.f3) (0)
          • E31k - 8.bxc3 e5 9.Nf3 — Main Line (0)
          • E31l - 8.bxc3 e5 9.Qc2 — Main Line (0)
          • E31m - 8.bxc3 e5 9.Bd3 — Main Line (3)
          • E31n - 8.bxc3 e5 9.f3 (not 9...Nbd7) (2)
          • E31o - 8.bxc3 e5 9.f3 Nbd7 — Main Line (1)
        • E31b - 7.e3 (not 7...O-O, 7...Qe7, 7...e5, 7...exd5, 7...g5) (0)
        • E31c - 7.e3 g5 (1)
        • E31d - 7.e3 exd5 (1)
        • E31e - 7.e3 e5 (0)
        • E31f - 7.e3 Qe7 (1)
        • E31g - 7.e3 O-O (1)
      • E32a - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 - Nimzo-Indian Defense: Classical Variation (358)
        • 4...h6 (1)
        • 4...O-O 5.a3 Bxc3+ (212)
          • E32h - 5...Bxc3+ (not 6.Qxc3) (0)
          • E32h - 6.Qxc3 (not 6...Ne4, 6...b5, 6...b6, 6...d6) (2)
          • E32i - 6.Qxc3 b5 (11)
          • E32j - 6.Qxc3 d6 (30)
          • E32k - 6.Qxc3 Ne4 (6)
          • E32l - 6.Qxc3 b6 (not 7.Bg5, 7.Nf3) (4)
          • E32m - 6.Qxc3 b6 7.Nf3 (25)
          • E32n - 6.Qxc3 b6 7.Bg5 (not 7...Ba6, 7...Bb7) (11)
          • E32o - 6.Qxc3 b6 7.Bg5 Ba6 (5)
          • E32p - 6.Qxc3 b6 7.Bg5 Bb7 (not 8.e3, 8.f3) (12)
          • E32q - 6.Qxc3 b6 7.Bg5 Bb7 8.f3 (not 8...h6) (16)
          • E32r - 6.Qxc3 b6 7.Bg5 Bb7 8.f3 h6 (not 9.Bh4) (0)
          • E32r - 6.Qxc3 b6 7.Bg5 Bb7 8.f3 h6 9.Bh4 (37)
          • E32s - 6.Qxc3 b6 7.Bg5 Bb7 8.e3 (not 8...d6) (2)
          • E32t - 6.Qxc3 b6 7.Bg5 Bb7 8.e3 d6 (51)
      • E32b - 4...b6 (15)
      • E32c - 4...d6 (30)
      • E32d - 4...O-O (not 5.Bg5, 5.Nf3, 5.a3, 5.e4) (9)
      • E32e - 4...O-O 5.Bg5 (9)
      • E32f - 4...O-O 5.e4 (44)
      • E32g - 4...O-O 5.Nf3 (37)
      • E32h - 4...O-O 5.a3 (not 5...Bxc3+) (0)
      • E33 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 - Nimzo-Indian Defense: Classical Variation, Zurich Variation (16)
      • E34 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 - Nimzo-Indian Defense: Classical Variation, Noa Variation (73)
      • E35 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5 - Nimzo-Indian Defense: Classical Variation, Noa Variation (65)
      • E36 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 - Nimzo-Indian Defense: Classical Variation, Noa Variation (102)
      • E37 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 - Nimzo-Indian Defense: Classical Variation, Noa Variation (38)
      • E38a - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 - Nimzo-Indian Defense: Classical Variation, Berlin Variation (38)
        • 5.dxc5 Bxc5 (12)
          • E38e - 5...Bxc5 (not 6.Nf3) (0)
          • E38e - 6.Nf3 (not 6...Qb6) (3)
          • E38f - 6.Nf3 Qb6 (9)
        • 5.dxc5 Na6 (10)
          • E38i - (not 6.a3) (4)
          • E38j - 6.a3 Bxc3+ 7.Qxc3 (1)
          • E38k - 6.a3 Bxc3+ 7.Qxc3 Nxc5 8.b4 (not 8...Nce4) (0)
          • E38k - 6.a3 Bxc3+ 7.Qxc3 Nxc5 8.b4 Nce4 (not 9.Qd4) (1)
          • E38l - 6.a3 Bxc3+ 7.Qxc3 Nxc5 8.b4 Nce4 9.Qd4 (not 9...d5) (0)
          • E38l - 6.a3 Bxc3+ 7.Qxc3 Nxc5 8.b4 Nce4 9.Qd4 d5 10.c5 (4)
      • E38b - 5.Nf3 (0)
      • E38c - 5.e3 (0)
      • E38d - 5.dxc5 (not 5...Nc6, 5...Qc7) (1)
      • E38g - 5.dxc5 Qc7 (12)
      • E38h - 5.dxc5 Nc6 (1)
      • E39a - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O - Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation (91)
        • 6.a3 Bxc5 (33)
          • E39j - 7.Nf3 (not 7...Nc6, 7...b6) (7)
          • E39k - 7.Nf3 Nc6 (10)
          • E39l - 7...b6 (not 8.Bg5) (11)
          • E39m - 7.Nf3 b6 8.Bg5 (5)
        • 6.Nf3 Na6 (42)
          • E39e - 6...Na6 (not 7.Bd2, 7.a3, 7.g3) (10)
          • E39f - 7.Bd2 (2)
          • E39g - 7.a3 (3)
          • E39h - 7.g3 (27)
      • E39b - 6.Bf4 (4)
      • E39c - 6.Nf3 (not 6...Bxc5) (0)
      • E39d - 6.Nf3 Bxc5 (3)
      • E39i - 6.a3 (not 6...Bxc5) (2)
      • E40 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 - Nimzo-Indian Defense: Rubinstein System (13)
      • E41 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 - Nimzo-Indian Defense: Rubinstein System (56)
      • E42 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 - Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation (63)
      • E43 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 - Nimzo-Indian Defense: St. Petersburg Variation (67)
        • E43 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O c5 - Nimzo-Indian Defense: St. Petersburg Variation (2)
      • E44 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 - Nimzo-Indian Defense: St. Petersburg Variation (27)
      • E45 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ba6 - Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation (13)
      • E46 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O - Nimzo-Indian Defense: Normal Variation (158)
        • E46 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 - Nimzo-Indian Defense: Normal Variation (8)
        • E46 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 - Nimzo-Indian Defense: Reshevsky Variation (1)
      • E47 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 - Nimzo-Indian Defense: Normal Variation (18)
      • E48 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 - Nimzo-Indian Defense: Normal Variation, Classical Defense (106)
        • E48 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 (3)
        • E48 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. cxd5 (7)
        • E48 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 (2)
      • E49 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 - Nimzo-Indian Defense: Normal Variation, Botvinnik System (74)
      • E50 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 - Nimzo-Indian Defense (26)
      • E51 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 - Nimzo-Indian Defense: Normal Variation, Ragozin Variation (39)
      • E52 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6 - Nimzo-Indian Defense: Normal Variation, Schlechter Defense (60)
      • E53 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 - Nimzo-Indian Defense: Normal Variation, Gligoric System (27)
      • E54 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 - Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation (118)
      • E55 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 - Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation (32)
      • E56 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 - Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense (24)
      • E58 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 - Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line (17)
      • E59 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4 - Nimzo-Indian Defense: Normal Variation, Bernstein Defense (33)
    • E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence (2483)
      • 4...d6 (not 5.Bd3, 5.Bg5, 5.Nge2) (1)
      • 4...d6 5.Bd3 (not 5...e5) (1)
      • 4...d6 5.Bd3 e5 (2)
      • 4...d6 5.Bg5 (not 5...h6) (2)
      • 4...d6 5.Bg5 h6 (2)
      • 4...d6 5.Nge2 (not 5...O-O) (1)
      • 4...O-O (not 5.Nf3, 5.e5) (4)
      • 4...O-O 5.e5 (0)
      • 4...O-O 5.Nf3 (9)
      • 5...a6 (not 6.Be3) (0)
      • 5...a6 6.Be3 (0)
      • 5...Bg4 (2)
      • 5...c5 (0)
      • 5...c5 (not 6.d5, 6.dxc5) (0)
      • 5...c5 (not 6.d5) (0)
      • 5...c5 (not 6.dxc5) (0)
      • 5...c5 6.d5 (0)
      • 5...c5 6.d5 O-O (5)
      • 5...c5 6.dxc5 (0)
      • 5...c5 6.dxc5 dxc5 7.Qxd8+ Kxd8 (3)
      • 5...c6 (not 6.Be3) (0)
      • 5...c6 6.Be3 (not 6...a6) (0)
      • 5...e5 (not 6.Nge2, 6.d5) (0)
      • 5...e5 6.d5 (0)
      • 5...e5 6.Nge2 (1)
      • 5...Na6 (0)
      • 5...Nbd7 (0)
      • 5...Nbd7 (7)
      • 5...Nbd7 (not 6.Be2) (0)
      • 5...Nbd7 6.Be2 (not 6...e5) (0)
      • 5...Nbd7 6.Be2 e5 (4)
      • 5...Nc6 (2)
      • 5...O-O (not 6.Bd3, 6.Be3, 6.Bg5, 6.h3) (1)
      • 5...O-O (not 6.Be3, 6.Bg5) (0)
      • 5...O-O (not 6.Nf3) (0)
      • 5...O-O 6.Bd3 (4)
      • 5...O-O 6.Be3 (not 6...c5) (0)
      • 5...O-O 6.Be3 (not 6...e5) (16)
      • 5...O-O 6.Be3 c5 (2)
      • 5...O-O 6.Be3 e5 (17)
      • 5...O-O 6.Bg5 (not 6...h6) (0)
      • 5...O-O 6.Bg5 (not 6...Nbd7, 6...c6, 6...h6) (2)
      • 5...O-O 6.Bg5 c6 (5)
      • 5...O-O 6.Bg5 h6 (0)
      • 5...O-O 6.Bg5 h6 (0)
      • 5...O-O 6.Bg5 Nbd7 (1)
      • 5...O-O 6.h3 (not 6...Na6, 6...Nbd7, 6...c5, 6...e5) (7)
      • 5...O-O 6.Nf3 (not 6...Bg4) (0)
      • 5...O-O 6.Nf3 Bg4 (5)
      • 6...a5 (0)
      • 6...a6 (1)
      • 6...Bg4 (not 7.Be3) (3)
      • 6...Bg4 7.Be3 (not 7...Nfd7) (3)
      • 6...c5 (not 7.O-O, 7.d5) (0)
      • 6...c5 7.d5 (not 7...e6) (4)
      • 6...c5 7.O-O (not 7...Nc6) (9)
      • 6...c5 7.O-O Nc6 (4)
      • 6...c6 (not 7.O-O) (0)
      • 6...c6 7.O-O (2)
      • 6...Na6 (not 7.Bg5, 7.O-O) (0)
      • 6...Na6 7.Bg5 (11)
      • 6...Na6 7.O-O (not 7...c5) (1)
      • 6...Na6 7.O-O c5 (0)
      • 6...Nbd7 (not 7.Bg5, 7.O-O, 7.e5) (0)
      • 6...Nbd7 7.Bg5 (1)
      • 6...Nbd7 7.e5 (0)
      • 6...Nbd7 7.O-O (not 7...c6) (1)
      • 6...Nc6 (not 7.d5) (1)
      • 6...Nc6 7.d5 (0)
      • 6.Be3 (not 6...Nbd7, 6...a6, 6...c5, 6...c6) (1)
      • 6.Bg5 (not 6...Nc6, 6...a6) (0)
      • 6.Bg5 a6 (7)
      • 6.Bg5 Nc6 (3)
      • 6.Nge2 (not 6...e5) (14)
      • 6.Nge2 e5 (3)
      • 7...a5 (0)
      • 7...a5 - Stein Variation (8)
      • 7...c5 (1)
      • 7...c6 (not 8.Be3, 8.d5) (1)
      • 7...c6 8.Be3 (8)
      • 7...c6 8.d5 (2)
      • 7...exd4 - Orthodox Variation (3)
      • 7...Na6 (not 8.Be3, 8.Re1) (8)
      • 7...Na6 8.Be3 (not 8...Ng4) (32)
      • 7...Na6 8.Re1 (not 8...c6) (16)
      • 7...Nbd7 (0)
      • 7...Nbd7 (not 8.Be3, 8.Qc2, 8.d5) (2)
      • 7...Nbd7 8.Be3 (not 8...Re8) (20)
      • 7...Nbd7 8.Be3 Re8 (6)
      • 7...Nbd7 8.d5 (not 8...Nc5) (0)
      • 7...Nbd7 8.Qc2 (not 8...Re8, 8...c6) (0)
      • 7...Nbd7 8.Qc2 c6 (5)
      • 7...Nbd7 8.Qc2 Re8 (7)
      • 7...Nh5 (not 8.Qd2) (1)
      • 7...Nh5 8.Qd2 (not 8...Qh4+, 8...f5) (0)
      • 7.Bd3 (not 7...Nfd7) (0)
      • 7.Bd3 Nfd7 (1)
      • 7.Be3 (not 7...Qe7, 7...c6, 7...exd4) (9)
      • 7.Be3 c6 (17)
      • 7.Be3 exd4 (20)
      • 7.Be3 Qe7 (5)
      • 7.d5 (not 7...Qa5) (0)
      • 7.d5 Qa5 (1)
      • 7.dxc5 (not 7...Qa5) (0)
      • 7.dxe5 (not 7...dxe5) (0)
      • 7.Nge2 (not 7...Rb8, 7...a6) (1)
      • 7.Qd2 (not 7...a6) (2)
      • 7.Qd2 (not 7...c5) (0)
      • 7.Qd2 c5 8.d5 (1)
      • 8...a5 (0)
      • 8...c6 (not 9.Bf1, 9.Rb1) (1)
      • 8...c6 9.Bf1 (not 9...Re8) (3)
      • 8...c6 9.Bf1 Re8 (1)
      • 8...c6 9.Rb1 (1)
      • 8...exd4 (not 9.Nxd4) (0)
      • 8...exd4 9.Nxd4 Nc5 (0)
      • 8...h6 (3)
      • 8...Re8 (not 9.Bf1) (0)
      • 8...Re8 9.Bf1 (2)
      • 8.Be3 (not 8...Ng4) (0)
      • 8.d5 (not 8...Ne7) (0)
      • 8.dxe5 (7)
      • 8.Nf3 (not 8...exd5, 8...h6) (0)
      • 8.Qd2 (not 8...exd5) (0)
      • 9...c5 (0)
      • 9...Nd7 (not 10.Be3, 10.Kh1, 10.Nd3, 10.f3) (0)
      • 9...Nd7 10.Be3 (not 10...f5) (0)
      • 9...Nd7 10.f3 (0)
      • 9...Nd7 10.Kh1 (0)
      • 9...Nd7 10.Nd3 (not 10...f5) (0)
      • 9...Ne8 (not 10.Be3, 10.Nd3) (1)
      • 9...Ne8 10.Be3 (not 10...f5) (0)
      • 9...Ne8 10.Nd3 (not 10...f5) (2)
      • E60a - 1. d4 Nf6 2. c4 g6 - Indian Defense: West Indian Defense (337)
        • 3.Bg5 Bg7 4.Nc3 d5 - West Indian Defense (1)
        • 3.g3 Bg7 (43)
          • E60e - 4.Bg2 (not 4...O-O) (14)
          • E60e - 4.Bg2 O-O (29)
        • 3.h4 (2)
        • 3.Nf3 Bg7 (162)
          • E60g - 3...Bg7 (not 4.b3) (32)
          • E60h - 4.b3 (not 4...O-O, 4...d6) (0)
          • E60h - 4.b3 d6 5.Bb2 (not 5...O-O) (0)
          • E60h - 4.b3 d6 5.Bb2 O-O (not 6.e3, 6.g3) (0)
          • E60h - 4.b3 d6 5.Bb2 O-O 6.e3 (5)
          • E60h - 4.b3 O-O 5.Bb2 (0)
          • E60i - 4.b3 d6 5.Bb2 O-O 6.g3 (not 6...c5) (0)
          • E60i - 4.b3 d6 5.Bb2 O-O 6.g3 c5 7.Bg2 Nc6 8.O-O (18)
          • E60j - 4.g3 O-O (not 5.Bg2) (46)
          • E60k - 4.g3 O-O 5.Bg2 (not 5...d6) (0)
          • E60k - 4.g3 O-O 5.Bg2 d6 (not 6.O-O) (1)
          • E60k - 4.g3 O-O 5.Bg2 d6 6.O-O (not 6...Nbd7, 6...Nc6, 6...c5, 6...c6) (35)
          • E60l - 4.g3 O-O 5.Bg2 d6 6.O-O c5 (not 7.dxc5) (0)
          • E60l - 4.g3 O-O 5.Bg2 d6 6.O-O c5 7.dxc5 (5)
          • E60m - 4.g3 O-O 5.Bg2 d6 6.O-O c6 (8)
          • E60n - 4.g3 O-O 5.Bg2 d6 6.O-O Nc6 (2)
          • E60o - 4.g3 O-O 5.Bg2 d6 6.O-O Nbd7 (not 7.Qc2) (0)
          • E60p - 4.g3 O-O 5.Bg2 d6 6.O-O Nbd7 7.Qc2 (not 7...e5) (0)
          • E60q - 4.g3 O-O 5.Bg2 d6 6.O-O Nbd7 7.Qc2 e5 (8)
          • E60r - 4.g3 O-O 5.Bg2 d6 6.O-O Nbd7 7.Qc2 e5 8.Rd1 Re8 (2)
      • E60a - 3.Qc2 (18)
      • E60b - 3.Bg5 (5)
      • E60c - 3.d5 (not 3...b5) (0)
      • E60c - 3.d5 b5 (1)
      • E60d - 3.f3 (46)
      • E60e - 1. d4 Nf6 2. c4 g6 3. g3 - King's Indian Defense: Fianchetto Variation, Immediate Fianchetto (14)
        • 3...c5 - Immediate Fianchetto (1)
        • 3...c6 - Immediate Fianchetto (4)
      • E60e - 3...Bg7 (8)
      • E60f - 1. d4 Nf6 2. Nf3 g6 3. c4 - King's Indian Defense: Normal Variation, King's Knight Variation (5)
        • 3...Bg7 4.e3 O-O - King's Knight Variation (2)
      • E60f - 3.Nf3 d6 (43)
      • E60j - 3...Bg7 4.g3 - Fianchetto (3)
      • E61a - 1. d4 Nf6 2. c4 g6 3. Nc3 - King's Indian Defense (213)
        • 3...Bg7 4.Bg5 O-O (0)
          • E61d - (not 5.e3) (0)
          • E61e - 5.e3 d6 (0)
        • 3...Bg7 4.g3 d6 (3)
          • E61f - 4...d6 (not 5.Bg2) (0)
          • E61f - 5.Bg2 (3)
        • 3...Bg7 4.g3 O-O (30)
          • E61g - 4...O-O (not 5.Bg2) (0)
          • E61g - 5.Bg2 (not 5...d6) (1)
          • E61g - 5.Bg2 d6 (not 6.e3) (19)
          • E61h - 5.Bg2 d6 6.e3 (10)
        • 3...Bg7 4.Nf3 d6 (10)
          • E61i - 4...d6 (not 5.e3) (2)
          • E61i - 5.e3 (0)
          • E61j - 5.Bg5 h6 (8)
        • 3...Bg7 4.Nf3 O-O (54)
          • E61k - 4...O-O (not 5.Bf4, 5.Bg5, 5.e3, 5.g3) (0)
          • E61l - 5.g3 (5)
          • E61m - 5.e3 (not 5...d6) (0)
          • E61m - 5.e3 d6 (not 6.Be2) (2)
          • E61n - 5.e3 d6 6.Be2 (not 6...c5) (11)
          • E61o - 5.e3 d6 6.Be2 c5 (not 7.O-O) (0)
          • E61o - 5.e3 d6 6.Be2 c5 7.O-O (0)
          • E61p - 5.Bf4 (not 5...d6) (0)
          • E61q - 5.Bf4 d6 (not 6.e3, 6.h3) (0)
          • E61q - 5.Bf4 d6 6.h3 (3)
          • E61r - 5.Bf4 d6 6.e3 (6)
          • E61s - 5.Bg5 (not 5...c5, 5...d6) (3)
          • E61t - 5.Bg5 c5 (not 6.e3) (0)
          • E61t - 5.Bg5 c5 6.e3 (5)
          • E61u - 5.Bg5 d6 (not 6.e3) (4)
          • E61v - 5.Bg5 d6 6.e3 (not 6...Nbd7, 6...c6) (10)
          • E61w - 5.Bg5 d6 6.e3 c6 (0)
          • E61y - 5.Bg5 d6 6.e3 Nbd7 (not 7.Be2) (0)
          • E61y - 5.Bg5 d6 6.e3 Nbd7 7.Be2 (not 7...c6) (5)
          • E61z - 5.Bg5 d6 6.e3 Nbd7 7.Be2 c6 (not 8.O-O) (0)
          • E61z - 5.Bg5 d6 6.e3 Nbd7 7.Be2 c6 8.O-O (0)
      • E61a - 3...c5 (2)
      • E61a - 3...c6 (0)
      • E61a - 3...d6 (0)
      • E61b - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 - King's Indian Defense (2)
      • E61b - 3...Bg7 4.Bf4 (0)
      • E61c - 3...Bg7 4.Bg5 (not 4...O-O) (6)
      • E61f - 3...Bg7 4.g3 (not 4...O-O, 4...d6) (0)
      • E61i - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 - King's Indian Defense (4)
      • E61j - 4...d6 5.Bg5 - Smyslov System (1)
      • E62c - 6...c6 (not 7.O-O) (0)
      • E62d - 6...c6 7.O-O (not 7...Bf5, 7...a6) (8)
      • E62e - 7.O-O a6 (3)
      • E62f - 7...Bf5 - Larsen System (26)
      • E62l - 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 - King's Indian Defense: Fianchetto Variation, Carlsbad Variation (141)
        • 7.O-O Bf5 (49)
          • E62g - 8.b3 (4)
          • E62p - 6...Nc6 7.O-O Bf5 (not 8.d5) (16)
          • E62q - 8.d5 (4)
        • 7.O-O Bg4 (14)
          • E62r - 7...Bg4 (not 8.d5) (7)
          • E62s - 8.d5 (7)
        • 7.O-O e5 (36)
          • E62t - (not 8.d5) (28)
          • E62u - 8.d5 Ne7 (not 9.e4) (3)
          • E62v - 8.d5 Ne7 9.e4 (5)
        • 7.O-O Qa5 (8)
          • E62h - 7...Qa5 (not 8.e4, 8.h3) (1)
          • E62i - 8.h3 (3)
          • E62j - 8.e4 (not 8...Bg4) (3)
          • E62k - 8.e4 Bg4 (1)
      • E62m - 7.d5 - Carlsbad Variation (4)
      • E62n - 6...Nc6 7.O-O (not 7...Rb8) (4)
      • E62o - 7.O-O Rb8 (12)
      • E63a - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 - King's Indian Defense: Fianchetto Variation, Panno Variation (107)
        • 8.b3 Rb8 (22)
          • E63e - 8...Rb8 (not 9.Bb2, 9.Nd5) (11)
          • E63f - 9.Bb2 (4)
          • E63g - 9.Nd5 (7)
        • 8.h3 Rb8 (12)
          • E63i - 8...Rb8 (not 9.Be3, 9.e4) (1)
          • E63j - 9.Be3 (2)
          • E63k - 9.e4 (9)
      • E63b - 8.Re1 (12)
      • E63c - 8.e4 (3)
      • E63d - 8.b3 (not 8...Rb8) (0)
      • E63h - 8.h3 (not 8...Rb8) (10)
      • E63l - 8.d5 (not 8...Na5) (0)
      • E63m - 8.d5 Na5 (8)
      • E64a - 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5 - King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line (4)
      • E64b - 7.dxc5 (0)
      • E64c - 7.d5 (not 7...Na6, 7...e6) (4)
      • E64d - 7.d5 e6 (0)
      • E64e - 7.d5 Na6 (0)
      • E65a - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 - King's Indian Defense: Fianchetto Variation, Yugoslav Variation (27)
        • 7...Nc6 8.dxc5 dxc5 - 9.Be3 (2)
        • 7...Nc6 8.dxc5 dxc5 — Exchange (18)
          • E65g - 9.Be3 (8)
          • E65h - 9.Bf4 (10)
      • E65b - 7...cxd4 (2)
      • E65c - 7...Nbd7 (0)
      • E65d - 7...Nc6 (not 8.dxc5, 8.h3) (3)
      • E65e - 7...Nc6 8.h3 (1)
      • E65f - 7...Nc6 8.dxc5 (not 8...dxc5) (0)
      • E66a - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. d5 - King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line (27)
        • 8...Na5 9.Nd2 a6 — Main Line (17)
          • E66e - 9...a6 (not 10.Qc2, 10.Rb1) (0)
          • E66f - 10.Rb1 (not 10...Rb8) (1)
          • E66g - 10.Rb1 Rb8 (3)
          • E66h - 10.Qc2 (not 10...Rb8) (2)
          • E66i - 10.Qc2 Rb8 (not 11.b3) (1)
          • E66j - 10.Qc2 Rb8 11.b3 (not 11...b5) (0)
          • E66k - 10.Qc2 Rb8 11.b3 b5 (not 12.Bb2) (2)
          • E66l - 10.Qc2 Rb8 11.b3 b5 12.Bb2 (not 12...bxc4, 12...e5) (2)
          • E66m - 10.Qc2 Rb8 11.b3 b5 12.Bb2 e5 — Main Line (3)
          • E66n - 10.Qc2 Rb8 11.b3 b5 12.Bb2 bxc4 — Main Line (3)
      • E66b - 9.Nd2 (not 9...e5) (0)
      • E66c - 8...Na5 (not 9.Nd2) (1)
      • E66d - 8...Na5 9.Nd2 e5 (5)
      • E67a - 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 - King's Indian Defense: Fianchetto Variation, Debrecen Defense (40)
        • 7.O-O e5 (38)
          • E67e - 8.d5 (0)
          • E67f - 8.dxe5 (3)
          • E67g - 8.b3 (6)
          • E67h - 8.Qc2 (not 8...c6) (8)
          • E67i - 8.Qc2 c6 (8)
          • E67j - 8.h3 (not 8...Re8, 8...c6) (3)
          • E67k - 8.h3 Re8 (5)
          • E67l - 8.h3 c6 (2)
      • E67b - 7.O-O (not 7...c6) (0)
      • E67c - 7.O-O c6 (0)
      • E67d - 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d6 6.O-O Nbd7 7.Nc3 e5 - Classical Variation (6)
      • E68a - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. e4 - King's Indian Defense: Fianchetto Variation, Classical Variation (85)
        • 8...exd4 9.Nxd4 Re8 (42)
          • E68e - 9...Re8 (not 10.h3) (11)
          • E68f - 10.h3 (not 10...Nc5) (10)
          • E68g - 10.h3 Nc5 (17)
          • E68h - 10.h3 Nc5 11.Re1 a5 (4)
      • E68b - 8...Re8 (3)
      • E68c - 8...exd4 (not 9.Nxd4) (3)
      • E68d - 8...exd4 9.Nxd4 Nc5 (0)
      • E68i - 8...a6 (18)
      • E68j - 8...c6 (not 9.Rb1, 9.b3) (6)
      • E68k - 8...c6 9.Rb1 (1)
      • E68l - 8...c6 9.b3 (3)
      • E69a - 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. e4 c6 9. h3 - King's Indian Defense: Fianchetto Variation, Classical Main Line (38)
        • 9...Qa5 10.Re1 exd4 (12)
          • E69h - 11.Nxd4 (3)
          • E69h - 9...Qa5 10.Re1 exd4 (not 11.Nxd4) (0)
          • E69n - 11.Nxd4 Re8 (5)
          • E69w - 11.Nxd4 a5 (1)
          • E69y - 11.Nxd4 Nc5 12.Rb1 (1)
          • E69z - 11.Nxd4 Nc5 12.b3 (2)
        • 9...Re8 10.Be3 exd4 (3)
          • E69r - 10...exd4 (not 11.Nxd4) (0)
          • E69r - 11.Nxd4 (3)
        • 9...Re8 10.Re1 a5 (1)
          • E69u - 10...a5 (not 11.Be3) (0)
          • E69u - 11.Be3 (1)
      • E69b - 9...Qe7 (0)
      • E69c - 9...a6 (2)
      • E69d - 9...a5 (0)
      • E69e - 9...exd4 (not 10.Nxd4) (1)
      • E69f - 9...exd4 10.Nxd4 Re8 (0)
      • E69g - 9...Qa5 (not 10.Re1) (3)
      • E69h - 9...Qa5 10.Re1 (not 10...exd4) (0)
      • E69i - 9...Qb6 (not 10.Re1, 10.c5, 10.d5) (0)
      • E69i - 9...Qb6 10.d5 (1)
      • E69j - 9...Qb6 10.c5 (6)
      • E69k - 9...Qb6 10.Re1 (not 10...Re8) (3)
      • E69l - 9...Qb6 10.Re1 Re8 (0)
      • E69o - 9...Re8 (not 10.Be3, 10.Re1, 10.b3) (0)
      • E69p - 9...Re8 10.b3 (1)
      • E69q - 9...Re8 10.Be3 (not 10...exd4) (3)
      • E69s - 9...Re8 10.Re1 (not 10...Qc7) (0)
      • E69t - 9...Re8 10.Re1 Qc7 (0)
      • E70 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 - King's Indian Defense: Normal Variation (75)
        • 4...d6 5.Bd3 O-O (31)
          • 5...O-O (not 6.Nge2) (0)
          • 6.Nge2 (not 6...Nc6, 6...c5, 6...e5) (5)
          • 6.Nge2 c5 (not 7.d5) (0)
          • 6.Nge2 c5 7.d5 (not 7...e6) (0)
          • 6.Nge2 c5 7.d5 e6 (not 8.O-O) (0)
          • 6.Nge2 c5 7.d5 e6 8.O-O (13)
          • 6.Nge2 e5 (not 7.d5) (0)
          • 6.Nge2 e5 7.d5 (2)
          • 6.Nge2 Nc6 (not 7.O-O) (0)
          • 6.Nge2 Nc6 7.O-O (not 7...e5) (0)
          • 6.Nge2 Nc6 7.O-O e5 (11)
        • 4...d6 5.Bg5 O-O (5)
          • 5...O-O (not 6.Qd2) (0)
          • 6.Qd2 (5)
        • 4...d6 5.Nge2 O-O (15)
          • 5...O-O (not 6.Ng3) (0)
          • 6.Ng3 (not 6...e5) (10)
          • 6.Ng3 e5 (not 7.d5) (0)
          • 6.Ng3 e5 7.d5 (5)
      • E71 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 - King's Indian Defense: Makogonov Variation (69)
        • 5...O-O 6.Bg5 c5 (10)
          • 6...c5 (not 7.d5) (0)
          • 7.d5 (not 7...b5, 7...e6) (1)
          • 7.d5 b5 (1)
          • 7.d5 e6 (8)
        • 5...O-O 6.Bg5 Na6 (4)
          • 6...Na6 (not 7.Bd3) (0)
          • 7.Bd3 (not 7...e5) (0)
          • 7.Bd3 e5 (4)
      • E72 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3 - King's Indian Defense: Normal Variation, Deferred Fianchetto (2)
      • E73 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 - King's Indian Defense: Normal Variation, Standard Development (102)
        • E73a - King’s Indian: 5.Be2 (0)
        • E73b - King’s Indian: 5.Be2 c5 (0)
        • E73c - King’s Indian: 5.Be2 e5 (1)
        • E73d - King’s Indian: 5.Be2 e5 6.d5 (0)
        • E73e - King’s Indian: 5.Be2 Nbd7 (2)
        • E73f - King’s Indian: 5.Be2 O-O (4)
        • E73g - King’s Indian: 5.Be2 O-O 6.g4 (3)
        • E73h - King’s Indian: Semi-Averbakh System (41)
        • E73i - King’s Indian: Averbakh (4)
        • E73j - King’s Indian: Averbakh, 6…c6 (1)
        • E73k - King’s Indian: Averbakh, 6…c6 7.Qd2 (1)
        • E73l - King’s Indian: Averbakh, 6…c6 7.Qd2 Nbd7 (4)
        • E73m - King’s Indian: Averbakh, 6…Nbd7 (0)
        • E73n - King’s Indian: Averbakh, 6…Nbd7 7.Qd2 (2)
        • E73o - King’s Indian: Averbakh, 6…Nbd7 7.Qd2 e5 (0)
        • E73o - King’s Indian: Averbakh, 6…Nbd7 7.Qd2 e5 8.d5 (0)
        • E73o - King’s Indian: Averbakh, 6…Nbd7 7.Qd2 e5 8.d5 Nc5 (4)
        • E73p - King’s Indian: Averbakh, 6…Na6 (4)
        • E73q - King’s Indian: Averbakh, 6…Na6 7.h4 (2)
        • E73r - King’s Indian: Averbakh, 6…Na6 7.Qd2 (5)
        • E73s - King’s Indian: Averbakh, 6…Na6 7.Qd2 e5 (0)
        • E73s - King’s Indian: Averbakh, 6…Na6 7.Qd2 e5 8.d5 (1)
        • E73t - King’s Indian: Averbakh, 6…Na6 7.Qd2 e5 8.d5 c6 (5)
        • E73u - King’s Indian: Averbakh, 6…Na6 7.Qd2 e5 8.d5 Qe8 (2)
        • E73v - King’s Indian: Averbakh, 6…h6 (0)
        • E73w - King’s Indian: Averbakh, 6…h6 7.Be3 (10)
        • E73y - King’s Indian: Averbakh, 6…h6 7.Be3 e5 (0)
        • E73y - King’s Indian: Averbakh, 6…h6 7.Be3 e5 8.d5 (0)
        • E73y - King’s Indian: Averbakh, 6…h6 7.Be3 e5 8.d5 c6 (1)
        • E73z - King’s Indian: Averbakh, 6…h6 7.Be3 e5 8.d5 Nbd7 (2)
      • E74 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 - King's Indian Defense: Averbakh Variation, Benoni Defense (18)
        • 7.d5 a6 (4)
          • 7...a6 (not 8.Qd2, 8.a4) (0)
          • 8.a4 (not 8...Qa5) (3)
          • 8.a4 Qa5 (0)
          • 8.Qd2 (1)
        • 7.d5 b5 (2)
          • (not 8.cxb5) (0)
          • 8.cxb5 a6 9.a4 (2)
        • 7.d5 h6 (10)
          • 7...h6 (not 8.Be3, 8.Bf4, 8.Bh4) (0)
          • 8.Be3 (not 8...e6) (0)
          • 8.Be3 e6 (not 9.Qd2) (2)
          • 8.Be3 e6 9.Qd2 (4)
          • 8.Bf4 (not 8...e6) (2)
          • 8.Bf4 e6 (2)
          • 8.Bh4 (0)
        • 7.dxc5 Qa5 (1)
          • (not 8.Bd2) (0)
          • 8.Bd2 Qxc5 9.Nf3 Bg4 (1)
      • E75 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 - King's Indian Defense: Averbakh Variation, Main Line (5)
        • 8.Nf3 exd5 (0)
          • 8...exd5 (not 9.exd5) (0)
          • 9.exd5 (0)
        • 8.Nf3 h6 (2)
          • 8...h6 (not 9.Bd2, 9.Be3, 9.Bf4, 9.Bh4) (0)
          • 9.Bd2 (2)
          • 9.Be3 (0)
          • 9.Bf4 (0)
          • 9.Bh4 (0)
          • 9.Bh4 exd5 10.cxd5 (0)
        • 8.Qd2 exd5 (3)
          • 8...exd5 (not 9.exd5) (0)
          • 9.exd5 (not 9...Re8, 9...a6) (3)
          • 9.exd5 a6 (0)
          • 9.exd5 Re8 (not 10.Nf3) (0)
          • 9.exd5 Re8 10.Nf3 (not 10...Bg4) (0)
          • 9.exd5 Re8 10.Nf3 Bg4 (0)
      • E76 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 - King's Indian Defense: Four Pawns Attack (17)
        • 5...O-O 6.Nf3 c5 (10)
          • 6...c5 (not 7.d5, 7.dxc5) (0)
          • 7.d5 (not 7...a6, 7...b5, 7...e6) (0)
          • 7.d5 a6 (0)
          • 7.d5 b5 (0)
          • 7.d5 b5 8.cxb5 a6 9.a4 (3)
          • 7.d5 e6 (not 8.dxe6) (0)
          • 7.d5 e6 8.dxe6 (4)
          • 7.dxc5 (3)
          • 7.dxc5 Qa5 8.Bd3 Qxc5 9.Qe2 Nc6 (0)
        • 5...O-O 6.Nf3 Na6 (2)
          • 6...Na6 (not 7.Bd3, 7.Be2, 7.e5) (0)
          • 7.Bd3 (not 7...e5) (0)
          • 7.Bd3 e5 (1)
          • 7.Be2 (1)
          • 7.e5 (0)
      • E77 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. f4 - King's Indian Defense: Four Pawns Attack (2)
      • E78 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be2 - King's Indian Defense: Four Pawns Attack, Fluid Attack (0)
      • E79 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be2 cxd4 8. Nxd4 Nc6 9. Be3 - King's Indian Defense: Four Pawns Attack, Exchange Variation (0)
        • 9...Bd7 (not 10.O-O, 10.Qd2) (0)
        • 9...Bd7 10.O-O (0)
        • 9...Bd7 10.Qd2 (0)
        • 9...Bg4 (0)
        • 9...Ng4 (0)
        • 9...Nxd4 (0)
      • E80 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 - King's Indian Defense: Sämisch Variation (8)
        • 5...c6 6.Be3 a6 (2)
          • 6...a6 (not 7.Bd3, 7.a4) (1)
          • 7.a4 (0)
          • 7.Bd3 (1)
      • E81 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O - King's Indian Defense: Sämisch Variation, Normal Defense (114)
        • 6.Be3 a6 (7)
          • 6...a6 (not 7.Qd2) (0)
          • 7.Qd2 (7)
        • 6.Be3 c5 (38)
          • 6...c5 (not 7.Nge2, 7.d5, 7.dxc5) (0)
          • 7.d5 (1)
          • 7.dxc5 (not 7...dxc5) (0)
          • 7.dxc5 dxc5 8.Qxd8 (9)
          • 7.Nge2 (not 7...Nc6) (0)
          • 7.Nge2 Nc6 (not 8.d5) (7)
          • 7.Nge2 Nc6 8.d5 (21)
        • 6.Be3 c6 (9)
          • (not 7.Bd3) (2)
          • 7.Bd3 a6 (7)
        • 6.Be3 Nbd7 (9)
          • 6...Nbd7 (not 7.Qd2) (4)
          • 7.Qd2 (not 7...c5) (0)
          • 7.Qd2 c5 (not 8.Nge2, 8.d5) (0)
          • 7.Qd2 c5 8.d5 (3)
          • 7.Qd2 c5 8.Nge2 (not 8...a6) (0)
          • 7.Qd2 c5 8.Nge2 a6 (2)
        • 6.Bg5 c5 (7)
          • 6...c5 (not 7.d5) (0)
          • 7.d5 (not 7...a6, 7...e6, 7...h6) (0)
          • 7.d5 a6 (4)
          • 7.d5 e6 (not 8.Qd2) (0)
          • 7.d5 e6 8.Qd2 (3)
          • 7.d5 h6 (0)
        • 6.Nge2 c5 (16)
          • 6...c5 (not 7.d5) (0)
          • 7.d5 (16)
      • E82 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 b6 - King's Indian Defense: Sämisch Variation, Double Fianchetto (5)
        • 7.Bd3 a6 (2)
          • 7...a6 (not 8.Nge2) (0)
          • 8.Nge2 (not 8...c5) (0)
          • 8.Nge2 c5 (not 9.d5, 9.e5) (0)
          • 8.Nge2 c5 9.d5 (1)
          • 8.Nge2 c5 9.e5 (1)
        • 7.Bd3 Bb7 (1)
          • 7...Bb7 (not 8.Nge2) (1)
          • 8.Nge2 (not 8...c5) (0)
          • 8.Nge2 c5 (not 9.d5) (0)
          • 8.Nge2 c5 9.d5 e6 (0)
      • E83 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 - King's Indian Defense: Sämisch Variation, Yates Defense (18)
        • 7.Nge2 a6 (12)
          • 7...a6 (not 8.Nc1, 8.Qd2, 8.a3) (2)
          • 8.a3 (1)
          • 8.Nc1 (0)
          • 8.Qd2 (not 8...Re8) (7)
          • 8.Qd2 Re8 (2)
        • 7.Nge2 Rb8 (1)
          • (not 8.Qd2) (0)
          • 8.Qd2 Re8 (1)
        • 7.Qd2 a6 (2)
          • 7...a6 (not 8.O-O-O) (0)
          • 8.O-O-O (2)
      • E84 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6 8. Qd2 Rb8 - King's Indian Defense: Sämisch Variation, Panno Main Line (21)
        • 9.a3 (0)
        • 9.Bh6 (0)
        • 9.g4 (0)
        • 9.h4 (not 9...b5) (0)
        • 9.h4 b5 (3)
        • 9.h4 h5 — Main Line (5)
          • 10.O-O-O — Main Line (3)
          • 10.O-O-O b5 11.Bh6 — Main Line (0)
          • 9...h5 (not 10.O-O-O) (2)
        • 9.Nc1 (not 9...e5) (0)
        • 9.Nc1 e5 — Main Line (5)
          • 10.d5 — Main Line (0)
          • 10.d5 Nd4 11.Nb3 — Main Line (1)
          • 10.Nb3 — Main Line (4)
          • 9...e5 (not 10.Nb3, 10.d5) (0)
        • 9.O-O-O (0)
        • 9.Rb1 (1)
      • E85 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 - King's Indian Defense: Sämisch Variation, Orthodox Variation (1)
        • 7.dxe5 (not 7...dxe5) (0)
        • 7.dxe5 dxe5 8.Qxd8 (0)
        • 7.Nge2 (not 7...Nbd7, 7...exd4) (0)
        • 7.Nge2 exd4 (0)
        • 7.Nge2 Nbd7 (0)
        • 7.Nge2 Nc6 — Orthodox (1)
          • 7...Nc6 (not 8.d5) (0)
          • 8.d5 (not 8...Ne7) (0)
          • 8.d5 Ne7 (not 9.Qd2) (0)
          • 8.d5 Ne7 9.Qd2 (1)
      • E86 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6 - King's Indian Defense: Sämisch Variation (12)
        • 8.d5 (0)
        • 8.Qb3 (0)
        • 8.Qd2 (not 8...Nbd7) (1)
        • 8.Qd2 Nbd7 — Orthodox (11)
          • 8...Nbd7 (not 9.O-O-O, 9.d5) (1)
          • 9.d5 (0)
          • 9.O-O-O (not 9...a6) (0)
          • 9.O-O-O a6 (not 10.Kb1) (3)
          • 9.O-O-O a6 10.Kb1 (7)
      • E87 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 - King's Indian Defense: Sämisch Variation, Closed Variation (25)
        • 7...Nh5 8.Qd2 f5 — Orthodox (6)
          • 8...f5 (not 9.O-O-O) (0)
          • 9.O-O-O (not 9...Nd7, 9...f4) (1)
          • 9.O-O-O f4 (3)
          • 9.O-O-O Nd7 (not 10.Bd3) (1)
          • 9.O-O-O Nd7 10.Bd3 (1)
        • 7...Nh5 8.Qd2 Qh4+ — Orthodox (2)
          • 8...Qh4+ (not 9.Bf2, 9.g3) (0)
          • 9.Bf2 (0)
          • 9.g3 (2)
      • E89 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6 8. d5 cxd5 - King's Indian Defense: Sämisch Variation, Closed Variation, Main Line (10)
        • 9.cxd5 a6 (0)
        • 9.cxd5 Bd7 (0)
        • 9.cxd5 Nbd7 — Orthodox (10)
          • 10.Qd2 (not 10...a6) (0)
          • 10.Qd2 a6 (not 11.g4) (2)
          • 10.Qd2 a6 11.g4 (not 11...h5) (1)
          • 10.Qd2 a6 11.g4 h5 (not 12.h3) (2)
          • 10.Qd2 a6 11.g4 h5 12.h3 — Main Line (5)
          • 9...Nbd7 (not 10.Qd2) (0)
      • E90 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 - King's Indian Defense: Normal Variation, Rare Defenses (170)
        • 5...O-O 6.Be3 e5 (2)
          • (not 7.dxe5) (0)
          • 7.dxe5 dxe5 8.Qxd8 (2)
        • 5...O-O 6.h3 c5 (42)
          • 6...c5 (not 7.Be3, 7.d5) (0)
          • 7.Be3 (5)
          • 7.d5 (not 7...e6) (2)
          • 7.d5 e6 (not 8.Bd3) (0)
          • 7.d5 e6 8.Bd3 (not 8...Na6) (17)
          • 7.d5 e6 8.Bd3 exd5 9.exd5 Re8+ (13)
          • 7.d5 e6 8.Bd3 Na6 (not 9.O-O) (0)
          • 7.d5 e6 8.Bd3 Na6 9.O-O (not 9...Nc7) (0)
          • 7.d5 e6 8.Bd3 Na6 9.O-O Nc7 (5)
        • 5...O-O 6.h3 e5 (84)
          • 6...e5 (not 7.Be3, 7.d5) (0)
          • 7.Be3 (0)
          • 7.d5 (not 7...Na6, 7...Nbd7, 7...a5) (31)
          • 7.d5 a5 (27)
          • 7.d5 Na6 (not 8.Be3, 8.Bg5) (0)
          • 7.d5 Na6 8.Be3 (13)
          • 7.d5 Na6 8.Bg5 (0)
          • 7.d5 Nbd7 (not 8.Be3, 8.Bg5) (0)
          • 7.d5 Nbd7 8.Be3 (7)
          • 7.d5 Nbd7 8.Bg5 (0)
          • 7.dxe5 dxe5 8.Qxd8 (6)
        • 5...O-O 6.h3 Na6 (9)
          • 6...Na6 (not 7.Bg5) (0)
          • 7.Bg5 (9)
        • 5...O-O 6.h3 Nbd7 (2)
          • 6...Nbd7 (not 7.Bg5) (0)
          • 7.Bg5 (2)
      • E91 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 - King's Indian Defense: Orthodox Variation (83)
        • 6...Bg4 7.Be3 Nfd7 (14)
          • 7...Nfd7 (not 8.Ng1) (11)
          • 8.Ng1 (3)
        • 6...c5 7.d5 e6 (20)
          • 7...e6 (not 8.O-O) (0)
          • 8.O-O (not 8...Re8) (8)
          • 8.O-O Re8 (not 9.Nd2) (0)
          • 8.O-O Re8 9.Nd2 (12)
        • 6...Na6 7.O-O c6 (0)
      • E92 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 - King's Indian Defense: Orthodox Variation (147)
        • 7.Be3 Ng4 — Main Line (37)
          • (not 8.Bg5) (0)
          • 8.Bg5 f6 9.Bc1 (3)
          • 8.Bg5 f6 9.Bh4 (not 9...Nc6) (18)
          • 8.Bg5 f6 9.Bh4 Nc6 — Main Line (16)
        • 7.d5 a5 — Main Line (28)
          • 8.Bg5 (not 8...h6) (0)
          • 8.Bg5 h6 (5)
          • 8.Bg5 h6 9.Bh4 Na6 (not 10.Nd2) (1)
          • 8.Bg5 h6 9.Bh4 Na6 10.Nd2 (not 10...Qe8) (4)
          • 8.Bg5 h6 9.Bh4 Na6 10.Nd2 Qe8 (not 11.O-O) (1)
          • 8.Bg5 h6 9.Bh4 Na6 10.Nd2 Qe8 11.O-O (not 11...Bd7) (6)
          • 8.Bg5 h6 9.Bh4 Na6 10.Nd2 Qe8 11.O-O Bd7 — Main Line (6)
          • 8.h3 (1)
        • 7.d5 c5 (3)
          • 7...c5 (not 8.Bg5) (1)
          • 8.Bg5 (2)
        • 7.dxe5 dxe5 (18)
          • (not 8.Qxd8) (4)
          • 8.Qxd8 Rxd8 9.Bg5 (not 9...Re8, 9...c6) (3)
          • 8.Qxd8 Rxd8 9.Bg5 c6 (3)
          • 8.Qxd8 Rxd8 9.Bg5 Re8 (not 10.Nd5) (2)
          • 8.Qxd8 Rxd8 9.Bg5 Re8 10.Nd5 (6)
      • E92 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 - King's Indian Defense: Petrosian Variation (8)
      • E93 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 - King's Indian Defense: Petrosian Variation, Normal Defense (6)
      • E94 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O - King's Indian Defense: Orthodox Variation (222)
        • 7...Bg4 - Orthodox Variation (1)
        • 7...exd4 8.Nxd4 Re8 (25)
          • 9...c6 (not 10.Kh1) (0)
          • 9...Nc6 (not 10.Be3) (0)
          • 9.f3 (not 9...Nc6, 9...c6) (0)
          • 9.f3 c6 10.Kh1 (15)
          • 9.f3 Nc6 10.Be3 (4)
          • 9.f3 Nc6 10.Be3 Nh5 11.Qd2 (6)
        • 7...h6 - Orthodox Variation (2)
        • 7...Na6 8.Be3 Ng4 — Main Line (27)
          • (not 9.Bg5) (4)
          • 9.Bg5 Qe8 (7)
          • 9.Bg5 Qe8 10.dxe5 dxe5 (not 11.h3) (0)
          • 9.Bg5 Qe8 10.dxe5 dxe5 11.h3 (not 11...h6) (0)
          • 9.Bg5 Qe8 10.dxe5 dxe5 11.h3 h6 — Main Line (16)
        • 7...Na6 8.Re1 c6 (28)
          • 8...c6 (not 9.Bf1) (0)
          • 9.Bf1 (28)
        • 7...Nbd7 8.Be3 c6 (7)
          • 9.d5 (not 9...c5) (0)
          • 9.d5 c5 (7)
        • 7...Nbd7 8.d5 Nc5 (6)
          • 8...Nc5 (not 9.Qc2) (2)
          • 9.Qc2 (not 9...a5) (0)
          • 9.Qc2 a5 (4)
        • 7...Re8 - Orthodox Variation (2)
      • E95 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1 - King's Indian Defense: Orthodox Variation (16)
        • 8...c6 9.Bf1 exd4 (4)
          • (not 10.Nxd4) (0)
          • 10.Nxd4 Ng4 (2)
          • 10.Nxd4 Re8 (2)
      • E96 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1 c6 9. Bf1 a5 - King's Indian Defense: Orthodox Variation, Positional Defense, Main Line (6)
      • E97 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 - King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense (226)
        • 8.Be3 Ng4 (15)
          • (not 9.Bg5) (0)
          • 9.Bg5 f6 10.Bc1 (15)
        • 8.d5 Ne7 (204)
          • 8...Ne7 (not 9.Bd2, 9.Bg5, 9.Nd2, 9.b4) (0)
          • 9.b4 (not 9...Kh8, 9...Ne8, 9...Nh5, 9...a5) (2)
          • 9.b4 a5 (not 10.Ba3, 10.bxa5) (0)
          • 9.b4 a5 10.Ba3 (not 10...axb4) (5)
          • 9.b4 a5 10.Ba3 axb4 (not 11.Bxb4) (0)
          • 9.b4 a5 10.Ba3 axb4 11.Bxb4 Nd7 (15)
          • 9.b4 a5 10.bxa5 (13)
          • 9.b4 Kh8 (0)
          • 9.b4 Ne8 (not 10.c5) (0)
          • 9.b4 Ne8 10.c5 (5)
          • 9.b4 Nh5 (not 10.Re1, 10.c5, 10.g3) (4)
          • 9.b4 Nh5 10.c5 (7)
          • 9.b4 Nh5 10.g3 (13)
          • 9.b4 Nh5 10.Re1 (not 10...Nf4, 10...a5, 10...f5) (3)
          • 9.b4 Nh5 10.Re1 a5 (13)
          • 9.b4 Nh5 10.Re1 f5 (9)
          • 9.b4 Nh5 10.Re1 f5 11.Ng5 Nf6 (not 12.Bf3) (0)
          • 9.b4 Nh5 10.Re1 f5 11.Ng5 Nf6 12.Bf3 (not 12...c6) (0)
          • 9.b4 Nh5 10.Re1 f5 11.Ng5 Nf6 12.Bf3 c6 (34)
          • 9.b4 Nh5 10.Re1 Nf4 (not 11.Bf1) (0)
          • 9.b4 Nh5 10.Re1 Nf4 11.Bf1 a5 (not 12.bxa5) (0)
          • 9.b4 Nh5 10.Re1 Nf4 11.Bf1 a5 12.bxa5 (6)
          • 9.Bd2 (9)
          • 9.Bg5 (17)
          • 9.Nd2 (not 9...Nd7, 9...Ne8, 9...c5) (5)
          • 9.Nd2 a5 10.a3 (not 10...Bd7, 10...Nd7) (0)
          • 9.Nd2 a5 10.a3 Bd7 (9)
          • 9.Nd2 a5 10.a3 Nd7 (not 11.Rb1) (0)
          • 9.Nd2 a5 10.a3 Nd7 11.Rb1 (not 11...f5) (0)
          • 9.Nd2 a5 10.a3 Nd7 11.Rb1 f5 12.b4 (28)
          • 9.Nd2 c5 (2)
          • 9.Nd2 Nd7 (not 10.b4) (0)
          • 9.Nd2 Nd7 10.b4 (1)
          • 9.Nd2 Ne8 (not 10.b4) (0)
          • 9.Nd2 Ne8 10.b4 (4)
      • E98 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 - King's Indian Defense: Orthodox Variation, Classical System (19)
        • 9...Ne8 10.Be3 f5 (8)
          • 11.f3 (not 11...f4) (2)
          • 11.f3 f4 (6)
        • 9...Ne8 10.Nd3 f5 (6)
          • 10...f5 (not 11.Bd2) (1)
          • 11.Bd2 (not 11...Kh8, 11...Nf6, 11...c5) (3)
          • 11.Bd2 c5 (0)
          • 11.Bd2 Kh8 (2)
          • 11.Bd2 Nf6 (0)
      • E99 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3 f5 - King's Indian Defense: Orthodox Variation, Classical System, Traditional Line (59)
  • B83 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 d6 6. Be2 Nf6 - Sicilian Defense: Scheveningen Variation, Modern Variation (57)
  • B83 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 Be7 7. O-O O-O 8. f4 Nc6 9. Be3 - Sicilian Defense: Scheveningen Variation, Modern Variation (1)
  • Sicilian (0)

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