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- (not 11.b3) — Main Line, 9...c5 10.Rd1 d6 — Main Line, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E19 - 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, SÉRIE E
Interpolis 1981 – Round 1 – Sosonko, Gennadi – 1/2-1/2 – Andersson, Ulf 1949 – G21

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- 6.Nc3 b5, 7.Bb3 d6 8.Nd5, 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, C84 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 - Ruy Lopez: Closed, SÉRIE C
Interpolis 1981 – Round 1 – Spassky, Boris V. – 1/2-1/2 – Beliavsky, Alexander G – G37

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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, B82 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f4 - Sicilian Defense: Scheveningen Variation, Matanovic Attack, B82 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
Interpolis 1981 – Round 1 – Spassky, Boris V. – 1/2-1/2 – Larsen, Benjamin Holsko – G30

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- (not 7.Bd3), 6.Be3 Bb4, B20 - B99 - 1. e4 c5 - Sicilian Defense, B40 - B49 1. e4 c5 2. Nf3 e6 Sicilian defence, B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 - Sicilian Defense: Taimanov Variation, B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 - Sicilian Defense: Four Knights Variation, B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
Interpolis 1981 – Round 1 – Spassky, Boris Vasily – 1/2-1/2 – Huebner, Robert – G31

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- 5...Nf6 6.Nc3 d6, 7.Be2 Nxd4 8.Qxd4 Bg7 9.Be3 O-O 10.Qd2, B20 - B99 - 1. e4 c5 - Sicilian Defense, B30 - B39 1.e4 c5 2. Nf3 Nc6 Sicilian defence, B36 - 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 - Sicilian Defense: Accelerated Dragon, Maróczy Bind, B36 - 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
Interpolis 1981 – Round 1 – Spassky, Boris Vasily – 1/2-1/2 – Sosonko, Gennadi – G33

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- 10.Qc2 Rb8 11.b3 b5 12.Bb2 bxc4 — Main Line, 8...Na5 9.Nd2 a6 — Main Line, E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E66 - 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, SÉRIE E
Interpolis 1981 – Round 1 – Timman, Jan H – 1-0 – Kasparov, Garry – G26

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