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- D10-D19 1. d4 d5 2. c4 c6 Queen's Gambit Slav defence, D14 - 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5 - Slav, D14g - 8…Bb4 - Slav Defense: Exchange Variation, Trifunovic Variation (1947), SÉRIE D
World Cup 1989 – Round 1 – Seirawan, Yasser – 1-0 – Nogueiras Santiago, Jesus – G12
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- E20-E59 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 Nimzo-Indian defence, E35 - 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 - Nimzo-Indian Defense: Classical Variation, Noa Variation (1932), E35g - 7.Bxf6 - Classical, Noa, Exchange (1929), SÉRIE E
World Cup 1989 – Round 1 – Seirawan, Yasser – 1-0 – Portisch, Lajos – G16
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- D43-D49 Queen's Gambit Declined semi-Slav1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6, D48 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 - Semi-Slav, D48p - 13.O-O - Meran, Reynolds (1952), SÉRIE D
World Cup 1989 – Round 1 – Seirawan, Yasser – 1/2-1/2 – Ribli, Zoltan – G19
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