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- 6.a3 Bxc5, E20-E59 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 Nimzo-Indian defence, E39a - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O - Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation, E39k - 7.Nf3 Nc6, SÉRIE E
Interpolis 1983 – Round 1 – Seirawan, Yasser – 1/2-1/2 – Van der Wiel, John T.H. – G18

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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D63 - 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bd3 - Queen's Gambit Declined: Orthodox Defense, Pillsbury Variation, SÉRIE D
Interpolis 1983 – Round 1 – Sosonko, Gennadi – 1/2-1/2 – Andersson, Ulf 1949 – G12

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- 7...exd4 8.Nxd4 Re8, 9.f3 c6 10.Kh1, E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E94 - 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O - King's Indian Defense: Orthodox Variation, SÉRIE E
Interpolis 1983 – Round 1 – Sosonko, Gennadi – 1/2-1/2 – Vaganian, Rafael A – G27

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- 5.e3 Nc6, D40-D42 – 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 – Queen’s Gambit Declined: Semi-Tarrasch Defense, D40a - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 - Queen's Gambit Declined: Semi-Tarrasch Defense, D40k - 6.a3 dxc4, SÉRIE D
Interpolis 1983 – Round 1 – Spassky, Boris V. – 1/2-1/2 – Huebner, Robert – G8

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- 7...Ne4 8.Nxe4 Bxe4, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E18a - 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, E18s - 9.Bf4, SÉRIE E
Interpolis 1983 – Round 1 – Spassky, Boris Vasily – 1/2-1/2 – Sosonko, Gennadi – G40

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- 4...d5 5.Nxe5 Nd7 — Main Line, A00a - Start position, C43a - 1. e4 e5 2. Nf3 Nf6 3. d4 - Petrov's Defense: Modern Attack, C43f - 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 - Petrov's Defense: Modern Attack, C43g - 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 - Petrov's Defense: Modern Attack, Center Variation, C43s - 6.Nxd7 Bxd7 7.O-O Qh4 — Main Line, SÉRIE C
Interpolis 1983 – Round 1 – Timman, Jan H – 1/2-1/2 – Huebner, Robert – G35

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- 6.O-O O-O, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E17a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 - Queen's Indian Defense: Traditional Variation, E17y - 7.d5 exd5 8.Nh4 c6 9.cxd5 Nxd5 10.Nf5 Nc7 (not 11.e4), SÉRIE E
Interpolis 1983 – Round 1 – Timman, Jan H – 1/2-1/2 – Karpov, Aleksandr – G21

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