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- 10...Nbd7 11.Nbd2 Bb7 — Main Line, 12.Bc2 Re8 13.a4 — Main Line, 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, C95 - 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, SÉRIE C
World Cup 1989 – Round 1 – Nunn, John D M – 1/2-1/2 – Portisch, Lajos – G65

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- 6...h6 7.h4 Nc6, 8.Rg1 h5, 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, B81 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 - Sicilian Defense: Scheveningen Variation, Keres Attack, B81 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
World Cup 1989 – Round 1 – Nunn, John D M – 1/2-1/2 – Sax, Gyula – G52

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- 6.g3 a6, 7.Bg2 d6 8.O-O Bd7 9.Re1, B20 - B99 - 1. e4 c5 - Sicilian Defense, B40 - B49 1. e4 c5 2. Nf3 e6 Sicilian defence, B47 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 - Sicilian Defense: Taimanov Variation, Bastrikov Variation, SÉRIE B 1.e4 2....
World Cup 1989 – Round 1 – Nunn, John D M – 1/2-1/2 – Van der Wiel, John T.H. – G47

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- 6.Ne5, D43-D49 Queen's Gambit Declined semi-Slav1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6, D45 - 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 - Semi-Slav Defense: Main Line, D45 - 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 a6 - Semi-Slav Defense: Accelerated Meran Variation, SÉRIE D
World Cup 1989 – Round 1 – Portisch, Lajos – 1-0 – Nogueiras Santiago, Jesus – G31

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- 10.Nc3 Qb6, 9.Rd1 Nbd7, D20-D29 1. d4 d5 2. c4 dxc4 Queen's gambit accepted, 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, SÉRIE D
World Cup 1989 – Round 1 – Portisch, Lajos – 1-0 – Ribli, Zoltan – G21

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