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- 5.h4 (not 5...dxe4, 5...Nxe4, 5...c6), B07 - 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2 - Pirc Defense: 150 Attack, B07 1. e4 d6 2. d4 Nf6 3. Nc3 Pirc defence, B07-B09 1. e4 d6 2. d4 Nf6 3. Nc3 Pirc defence, SÉRIE B 1.e4 2....
Biel Interzonal 1993 – Round 4 – Barua, Dibyendu – 1-0 – Nikolic, Predrag – G98

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- 8.d5 Ne7, 9.Nd2, E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E97 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 - King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense, SÉRIE E
Biel Interzonal 1993 – Round 4 – Ehlvest, Jaan – 1-0 – Hellers, Ferdinand – G103

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- 8.d5 Ne7, 9.Nd2 a5 10.a3 Nd7 11.Rb1 f5 12.b4, E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E97 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 - King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense, SÉRIE E
Biel Interzonal 1993 – Round 4 – Epishin, Vladimir – 1/2-1/2 – Van Wely, Loek – G92

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- 7...c5 8.Rb1 O-O — Exchange, 9.Be2 cxd4 10.cxd4 Qa5+ 11.Bd2, D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D85 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 - Grünfeld Defense: Exchange Variation, Modern Exchange Variation, D85 - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5- Grünfeld Defense, SÉRIE D
Biel Interzonal 1993 – Round 4 – Gelfand, Boris – 1-0 – Kozul, Zdenko – G2

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- 7...Ne4 8.Bd2 Bf6, 9.Rc1, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E18 - 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, SÉRIE E
Biel Interzonal 1993 – Round 4 – Granda Zuniga, Julio E – 0-1 – Abramovic, Bosko – G94

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- 6.O-O O-O — Main Line, 7.Qc2 a6 8.a4 Bd7 9.Qxc4 Bc6 10.Bg5 Bd5, E01-E09 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Catalan, closed, E05 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 - Catalan Opening: Open Defense, Classical Line, SÉRIE E
Biel Interzonal 1993 – Round 4 – Khalifman, Alexander – 1-0 – Lautier, Joel – G85

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