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- 6.O-O O-O — Main Line, 7.Ne5, E01-E09 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Catalan, closed, E05 - 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 - Catalan Opening: Open Defense, Classical Line, SÉRIE E
Candidats qf1 1977 – Round 1 – Korchnoi, Viktor – 1/2-1/2 – Petrosian, Tigran A. – G1
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- 9...Be4 (not 10.Ne1), 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, SÉRIE E
Candidats qf1 1977 – Round 10 – Petrosian, Tigran A. – 1/2-1/2 – Korchnoi, Viktor – G6
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- 6.e4 Nxc3 — Main Line, 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bc4 Nc6 12.O-O — Main Line, 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
Candidats qf1 1977 – Round 4 – Petrosian, Tigran A. – 1/2-1/2 – Korchnoi, Viktor – G3
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- 6.e4 Nxc3 — Main Line, 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bc4 Nc6 12.O-O b6 13.Rad1 — Main Line, 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
Candidats qf1 1977 – Round 6 – Petrosian, Tigran V – 1-0 – Korchnoi, Viktor – G1
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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D61 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qc2 - Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation, SÉRIE D
Candidats qf1 1977 – Round 7 – Korchnoi, Viktor – 1/2-1/2 – Petrosian, Tigran A. – G5
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