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- 6...dxc6 7.d3 Nd7 — Exchange, 8.Nbd2 O-O 9.Nc4 f6 10.Nh4 Nc5, C80-C89 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 & C84-C89 C84 5. O-O Be7 Ruy Lopez, closed defence, C85 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 - Ruy Lopez: Closed, Delayed Exchange, SÉRIE C
Candidats qf4 1977 – Round 12 – Hort, Vlastimil – 1/2-1/2 – Spassky, Boris V. – G10

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- 6.O-O Nh6, A10-A39 English Opening, A37 - 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 - English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation, A37 - 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 - English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3, SÉRIE A
Candidats qf4 1977 – Round 13 – Hort, Vlastimil – 1/2-1/2 – Spassky, Boris Vasily – G11

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- 4...d5 5.Nxe5 Be7, C40-C49 King's knight opening, C43 - 1. e4 e5 2. Nf3 Nf6 3. d4 - Petrov's Defense: Modern Attack, C43 - 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 - Petrov's Defense: Modern Attack, C43 - 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 - Petrov's Defense: Modern Attack, Center Variation, SÉRIE C
Candidats qf4 1977 – Round 14 – Spassky, Boris V. – 1/2-1/2 – Hort, Vlastimil – G12

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- 4...dxc6 5.O-O Bg4 — Exchange, 6.h3 h5 7.d3 Qf6 8.Nbd2, C60-C69 1. e4 e5 2. Nf3 Nc6 3. Bb5 Ruy Lopez (Spanish opening), C68 - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 - Ruy Lopez: Exchange Variation, SÉRIE C
Candidats qf4 1977 – Round 16 – Hort, Vlastimil – 1/2-1/2 – Spassky, Boris V. – G14

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- E20-E59 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 Nimzo-Indian defence, E59 - 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4 - Nimzo-Indian Defense: Normal Variation, Bernstein Defense, SÉRIE E
Candidats qf4 1977 – Round 2 – Hort, Vlastimil – 1/2-1/2 – Spassky, Boris Vasily – G2

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- A10-A39 English Opening, A25 - 1. c4 e5 2. Nc3 Nc6 - English Opening: King's English Variation, Reversed Closed Sicilian, A25 - 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Rb1 Nh6 5. Bg2 Bg7 - English Opening: Closed, Taimanov Variation, A25 - 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4.... - English Opening, SÉRIE A
Candidats qf4 1977 – Round 3 – Spassky, Boris Vasily – 1-0 – Hort, Vlastimil – G3

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- 6...h6 7.Bxf6 (not 7...Bxf6), D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D55 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 - Queen's Gambit Declined: Modern Variation, Normal Line, SÉRIE D
Candidats qf4 1977 – Round 6 – Hort, Vlastimil – 1/2-1/2 – Spassky, Boris Vasily – G5

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