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- 6...e6 7.Bxc4 Bb4, 8.O-O Nbd7 9.Nh4, D10-D19 1. d4 d5 2. c4 c6 Queen's Gambit Slav defence, D18 - 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 - Slav Defense: Czech Variation, Classical System, SÉRIE D
Amsterdam 1981 – Round 1 – Portisch, Lajos – 0-1 – Smyslov, Vladimir – G20

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- A60-A79 1. d4 Nf6 2. c4 c6 3. d5 e6 Modern Benoni Defense, A78 - 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6 - Benoni Defense: Classical Variation, Czerniak Defense, A78 - 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4.... - Benoni Defense, SÉRIE A
Amsterdam 1981 – Round 1 – Ree, Hans – 1/2-1/2 – Portisch, Lajos – G5

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