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- E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E17 - 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 - Queen’s Indian [+0.41], E17h - 6.Nc3 Ne4 7.Bd2 - Opovcensky Variation [+0.22], SÉRIE E
Ch World (match) (cand.) (1/2) 1971 – Round 6 – Korchnoi, Viktor – 1/2-1/2 – Petrosian, Tigran V – G1
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