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- 4...Ba6 5.b3 Bb4+ — Main Line, 6.Bd2 Be7 7.Bg2 d5 8.cxd5 exd5 9.O-O O-O, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E15 - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 - Queen's Indian Defense: Fianchetto Variation, SÉRIE E
Interpolis 1979 – Round 5 – Sosonko, Gennadi – 1/2-1/2 – Portisch, Lajos – G21

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- 5.d4 Be7 — Pillsbury, 6.Qe2 Nd6 7.Bxc6 bxc6 8.dxe5 Nb7 9.Nc3 — Main Line, C60-C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish opening), C67 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 - Ruy Lopez: Berlin Defense, Rio Gambit Accepted, SÉRIE C
Interpolis 1979 – Round 5 – Spassky, Boris V. – 1/2-1/2 – Smyslov, Vladimir – G23

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- 8.Rc1 Bb7 — Tartakower, 9.Bxf6 Bxf6 10.cxd5 exd5, D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D58 - 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, SÉRIE D
Interpolis 1979 – Round 5 – Timman, Jan H – 1/2-1/2 – Huebner, Robert – G20

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- 4.g3 (not 4...d5), A10-A39 English Opening, A35 - 1. c4 c5 2. Nc3 Nc6 - English Opening: Symmetrical Variation, Two Knights Variation, A35 - 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 - English Opening: Symmetrical Variation, Four Knights Variation, SÉRIE A
Interpolis 1979 – Round 6 – Larsen, Benjamin Holsko – 0-1 – Sosonko, Gennadi – G24

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- A10-A39 English Opening, A25 - 1. c4 e5 2. Nc3 Nc6 - English Opening: King's English Variation, Reversed Closed Sicilian, A25 - 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Rb1 Nh6 5. Bg2 Bg7 - English Opening: Closed, Taimanov Variation, A25 - 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4.... - English Opening, SÉRIE A
Interpolis 1979 – Round 6 – Portisch, Lajos – 1/2-1/2 – Sax, Gyula – G25

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- 6...Be7 7.e3 Nbd7 — Exchange, 8.Bd3 O-O 9.Nf3 Re8 10.O-O Nf8 — Main Line, D30-D39 1. d4 d5 2. c4 e6 Queen's gambit declined, D36 - 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, SÉRIE D
Interpolis 1979 – Round 7 – Timman, Jan H – 1/2-1/2 – Spassky, Boris Vasily – G28

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