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- A10-A39 English Opening, A30p - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.b3 - Symmetrical Hedgehog, A30p - 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.b3 O-O 8.Bb2 d6 - Symmetrical Hedgehog, SÉRIE A
Candidats qf1 1983 – Round 9 – Korchnoi, Viktor – 1-0 – Portisch, Lajos – G6
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