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- 6.a3 (not 6...Bxc5), 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
? 1990 – Round ? – Chernin, Alexander – 1-0 – Horvath, Jozsef M – G8

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- 6.a3 (not 6...Bxc5), 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
Niksic 1983 – Round 6 – Seirawan, Yasser – 1-0 – Portisch, Lajos – G40

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