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- 6.e4 Nxc3 — Main Line, 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bc4 Nc6 12.O-O (not 12...b6), D40-D42 – 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 – Queen’s Gambit Declined: Semi-Tarrasch Defense, D41 - 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 e6 - Queen's Gambit Declined: Semi-Tarrasch Defense, SÉRIE D
Amsterdam 1981 – Round 1 – Timman, Jan H – 1/2-1/2 – Hort, Vlastimil – G10

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- 6.a3 Bxc5, 7.Nf3 Nc6, E20-E59 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 Nimzo-Indian defence, E39 - 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, SÉRIE E
Amsterdam 1981 – Round 10 – Donner, Jan-Hein – 1/2-1/2 – Polugaevsky, Lev – G24

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- 5.Nb5 d6, 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 O-O, B20 - B99 - 1. e4 c5 - Sicilian Defense, B40 - B49 1. e4 c5 2. Nf3 e6 Sicilian defence, B44 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 - Sicilian Defense: Taimanov Variation, SÉRIE B 1.e4 2....
Amsterdam 1981 – Round 11 – Ljubojevic, Ljubomir – 1/2-1/2 – Langeweg, Kick – G28

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