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- 5...d6 6.Nge2 Nf6, 7.O-O O-O, A10-A39 English Opening, A36 - 1. c4 c5 2. e4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 - English Opening: Symmetrical Variation, Botvinnik System, A36 - 1. c4 c5 2. Nc3 Nc6 3. g3 - English Opening: Symmetrical Variation, Two Knights, Fianchetto Variation, SÉRIE A
ch-Wereld Teams 1989 – Round 1 – Phung Ye, Ryan – 1-0 – Nunn, John D M – G7

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- A80-A99 1. d4 f5 Dutch, A89 - 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 Nc6 - Dutch Defense: Leningrad Variation, Matulovic Variation, A89 - 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4.... - Dutch Defense, SÉRIE A
ch-Wereld Teams 1989 – Round 1 – Piket, Jeroen – 0-1 – Gurevich, Michael – G13

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- 6.g3 - 5.Nc3 Nc6 6.g3, B20 - B99 - 1. e4 c5 - Sicilian Defense, B50-B59 Sicilian 1. e4 c5 2. Nf3 d6, B56 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 - Sicilian Defense: Classical Variation, B56 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
ch-Wereld Teams 1989 – Round 1 – Popovic, Patrik – 1-0 – Piket, Jeroen – G46

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- (not 8.Nbd2), 6...dxc6 7.d3 Nd7 — Exchange, 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, C85 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 - Ruy Lopez: Closed, Delayed Exchange, SÉRIE C
ch-Wereld Teams 1989 – Round 1 – Rodriguez Cespedes, Amador – 0-1 – Nunn, John D M – G60

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- 10.e5 Ng4, 9.e4 c5 — Main Line, 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 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 - Semi-Slav Defense: Meran Variation, SÉRIE D
ch-Wereld Teams 1989 – Round 1 – Seirawan, Yasser – 1-0 – Nogueiras Santiago, Jesus – G9

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- A10-A39 English Opening, A19 - 1. c4 e6 2. Nc3 Nf6 3. e4 c5 - English Opening: Mikenas-Carls, Sicilian, A19 - 1. c4 e6 2. Nc3 Nf6 3. e4 c5 4. e5 Ng8 - English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit, SÉRIE A
ch-Wereld Teams 1989 – Round 1 – Seirawan, Yasser – 1/2-1/2 – Beliavsky, Alexander G – G6

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- (not 8.Nc1, 8.Qd2, 8.a3), 7.Nge2 a6, E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E83 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 - King's Indian Defense: Sämisch Variation, Yates Defense, SÉRIE E
ch-Wereld Teams 1989 – Round 1 – Seirawan, Yasser – 1/2-1/2 – Ye Lin, Jennifer – G35

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