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- 6.e4 Nxc3 — Main Line, 7.bxc3 cxd4 8.cxd4 Nc6, D40-D42 – 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 – Queen’s Gambit Declined: Semi-Tarrasch Defense, D41 - 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 e6 - Queen's Gambit Declined: Semi-Tarrasch Defense, SÉRIE D
Candidates qf1 1977 – Round 2 – Petrosian, Tigran V – 1/2-1/2 – Korchnoi, Viktor – G1
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