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- 7...Ne4 8.Bd2 Bf6, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, 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, E18r - 9.Rc1, SÉRIE E
IBM 1980 – Round 1 – Ribli, Zoltan – 1/2-1/2 – Timman, Jan H – G18

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- 6.e4 b5 — Main Line, D43-D49 Queen's Gambit Declined semi-Slav1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6, D44a - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 - Semi-Slav Defense Accepted, D44l - 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.g3 Qa5, SÉRIE D
IBM 1980 – Round 1 – Timman, Jan H – 1-0 – Dolmatov, Sergey – G5

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- 9...c5 10.Rd1 d6 — Main Line, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, 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, E19n - 11.b3 (not 11...Bf6), SÉRIE E
IBM 1980 – Round 1 – Timman, Jan H – 1/2-1/2 – Karpov, Aleksandr – G8

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- 4...Ba6 5.b3 Bb4+ — Main Line, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E15a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 - Queen's Indian Defense: Fianchetto Variation, E15p - 6.Bd2 Be7 7.Bg2 d5 8.cxd5 exd5 9.O-O O-O, SÉRIE E
IBM 1980 – Round 1 – Timman, Jan H – 1/2-1/2 – Ribli, Zoltan – G9

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- 5.d4 exd4, C50-C59 1. e4 e5 2. Nf3 Nc6 3. Bc4 Italian Game, C54a - 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 - Italian Game: Classical Variation, Giuoco Pianissimo, C54m - 6.cxd4 Bb4+ 7.Bd2 Nxe4 8.Bxb4 Nxb4 9.Bxf7+ Kxf7 10.Qb3+ d5 11.Ne5+ Kf6 12.f3, SÉRIE C
IBM 1980 – Round 1 – Van der Wiel, John T.H. – 0-1 – Karpov, Aleksandr – G14

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