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- 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, E39m - 8.Bg5 - Classical, Pirc (1956), SÉRIE E
Interpolis 1981 – Round 1 – Petrosian, Tigran V. – 1/2-1/2 – Larsen, Bent – G18
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- E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E19 - 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Qc2 Nxc3 9.Qxc3 - Queen's Indian Defense: Classical Variation, Traditional Variation, Main Line, E19o - 12…* - Old Main Line, SÉRIE E
Interpolis 1981 – Round 1 – Petrosian, Tigran V. – 1/2-1/2 – Portisch, Lajos – G22
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