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- 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 e6 6.Be2 a6 - Sicilian (1925), B84w - 7.O-O Qc7 8.Be3 Nc6 - Scheveningen, Classical (1924), SÉRIE B 1.e4 2....
Siegen olm 1970 – Round 14 – Unzicker, Wolfgang – 1/2-1/2 – Portisch, Lajos – G22
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- C60-C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish), C69 - 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6 - Ruy Lopez: Exchange Variation, Gligoric Variation, C69i - 6.d4 exd4 7.Nxd4 Ne7 - Exchange, Gligoric (1966), SÉRIE C
Siegen olm 1970 – Round 15 – Fischer, Raphael – 1-0 – Unzicker, Wolfgang – G24
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- 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, E94r - 7…Nbd7 8.d5 Nc5 9.Qc2 a5 - King’s Indian (1926), SÉRIE E
Siegen olm 1970 – Round 16 – Gligoric, Sofija – 0-1 – Fischer, Raphael – G26
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- C60-C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish), C69 - 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6 - Ruy Lopez: Exchange Variation, Gligoric Variation, C69d - 6.d4 Bg4 7.c3 Bd6 - Exchange, Gligoric (1907), SÉRIE C
Siegen olm 1970 – Round 16 – Hort, Vlastimil – 1/2-1/2 – Portisch, Lajos – G27
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- C60-C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish), C68 - 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 - Ruy Lopez: Morphy Defense, C68o - 4.Bxc6 dxc6 5.O-O Bg4 6.h3 h5 - Exchange Variation, Alapin Gambit (1959), SÉRIE C
Siegen olm 1970 – Round 16 – Larsen, Bent – 0-1 – Myagmarsuren, Lkhamsuren – G28
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- D40-D42 – 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 – Queen’s Gambit Declined: Semi-Tarrasch Defense, D42 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e3 Nc6 7.Bd3 - QGD, D42j - 7…cxd4 8.exd4 Be7 9.O-O O-O 10.Re1 - Semi-Tarrasch (1948), SÉRIE D
Siegen olm 1970 – Round 17 – Popov, Luben – 1-0 – Podzielny, Karl-Heinz – G29
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- B20-B99 1. e4 c5 - Sicilian Defense, B30-B39 1.e4 c5 2. Nf3 Nc6 Sicilian defence, B38 - 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 - Sicilian Defense: Accelerated Dragon, Maróczy Bind, B38q - 6…Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Nxd4 - Maroczy Bind (1908), SÉRIE B 1.e4 2....
Siegen olm 1970 – Round 18 – Larsen, Bent – 1/2-1/2 – Browne, Walter Shawn – G32
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- 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 - Tarrasch Defense: Rubinstein System, D33q - 6…Nf6 7.Bg2 cxd4 8.Nxd4 Be7 9.O-O O-O 10.Be3 - QGD Tarrasch (1969), SÉRIE D
Siegen olm 1970 – Round 18 – Spassky, Boris V. – 1-0 – Yanofsky, Daniel Abraham – G31
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