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- 7.Nb3 Ne5, A10-A39 English Opening, A33 - 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 Nc6 5. g3 cxd4 6. Nxd4 Qb6 - English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation, A33 - 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4.... - English Opening, SÉRIE A
Belgrad cm 1977 – Round 3 – Korchnoi, Viktor – 1-0 – Spassky, Boris Vasily – G1

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- 7.Nb3 (not 7...Ne5), A10-A39 English Opening, A33 - 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 Nc6 5. g3 cxd4 6. Nxd4 Qb6 - English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation, A33 - 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4.... - English Opening, SÉRIE A
Belgrad cm 1977 – Round 5 – Korchnoi, Viktor – 1/2-1/2 – Spassky, Boris Vasily – G2

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