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- 4...exd5 5.Bg5 Be7 — Exchange, D30-D39 1. d4 d5 2. c4 e6 Queen's gambit declined, D35b - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 - Queen's Gambit Declined: Exchange Variation, D35k - 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O - Queen's Gambit Declined: Exchange Variation, Positional Variation, SÉRIE D
World Cup 1989 – Round 1 – Speelman, Jon S – 0-1 – Beliavsky, Alexander G – G8

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- 4.exd5 Qxd5 — Main Line, C00-C19 1. e4 e6 French defence, C07a - 1. e4 e6 2. d4 d5 3. Nd2 c5 - French Defense: Tarrasch Variation, Open System, C07t - 5.Ngf3 cxd4 6.Bc4 Qd6 7.O-O Nf6 8.Nb3 Nc6 9.Nbxd4 Nxd4 10.Nxd4 a6 11.Re1 — Main Line, SÉRIE C
World Cup 1989 – Round 1 – Speelman, Jon S – 1-0 – Nogueiras Santiago, Jesus – G70

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- 7.a4 Nc6, D20-D29 1. d4 d5 2. c4 dxc4 Queen's gambit accepted, D27a - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 - Queen's Gambit Accepted: Classical Defense, Main Line, D27u - 8.Qe2 Qc7, SÉRIE D
World Cup 1989 – Round 1 – Speelman, Jon S – 1/2-1/2 – Huebner, Robert – G19

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- 7.a4 Nc6, D20-D29 1. d4 d5 2. c4 dxc4 Queen's gambit accepted, D27a - 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 - Queen's Gambit Accepted: Classical Defense, Main Line, D27v - 8.Qe2 cxd4 9.Rd1 Be7 10.exd4 O-O 11.Nc3 (not 11...Nd5), SÉRIE D
World Cup 1989 – Round 1 – Tal, Mikhail – 1/2-1/2 – Huebner, Robert – G36

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- 7...cxd4 8.exd4 Be7 — Main Line, D40-D42 – 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 – Queen’s Gambit Declined: Semi-Tarrasch Defense, D42a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 - Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line, D42r - 9.O-O O-O 10.Re1 Bf6 11.Be4 Nce7 12.Ne5 — Main Line, SÉRIE D
World Cup 1989 – Round 1 – Tal, Mikhail – 1/2-1/2 – Seirawan, Yasser – G29

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- 6.Bb5 Bd6 — Main Line, C00-C19 1. e4 e6 French defence, C09a - 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6 - French Defense: Tarrasch Variation, Open System, Main Line, C09q - 7.O-O Ne7 8.dxc5 Bxc5 9.Nb3 Bd6 10.Re1 O-O 11.Bg5 Bg4 — Main Line, SÉRIE C
World Cup 1989 – Round 1 – Tal, Mikhail – 1/2-1/2 – Vaganian, Rafael A – G34

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