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- 4...d5 5.Nxe5 Nd7 — Main Line, A00a - Start position, C43a - 1. e4 e5 2. Nf3 Nf6 3. d4 - Petrov's Defense: Modern Attack, C43f - 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 - Petrov's Defense: Modern Attack, C43g - 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 - Petrov's Defense: Modern Attack, Center Variation, C43p - 6.Qe2, SÉRIE C
Interpolis 1980 – Round 1 – Karpov, Aleksandr – 0-1 – Larsen, Benjamin Holsko – G36

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- 7...c5 8.Be3 O-O — Exchange, D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D85a - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5- Grünfeld Defense, D85i - 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 - Grünfeld Defense: Exchange Variation, Modern Exchange Variation, D85y - 9.Rc1 Qa5 10.Qd2 cxd4 11.cxd4 Qxd2+ 12.Nxd2, SÉRIE D
Interpolis 1980 – Round 1 – Karpov, Aleksandr – 1-0 – Huebner, Robert – G17

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- 6...h6 7.h4 Nc6, B20 - B99 - 1. e4 c5 - Sicilian Defense, B80-B85 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 Sicilian, Scheveningen variation, B81 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense, B81a - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 - Sicilian Defense: Scheveningen Variation, Keres Attack, B81m - 8.Rg1 (not 8...h5), SÉRIE B 1.e4 2....
Interpolis 1980 – Round 1 – Karpov, Aleksandr – 1-0 – Spassky, Boris V. – G28

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- 7...O-O 8.a4 Bb7, 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, C88a - 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 - Ruy Lopez: Closed, C88o - 9.d3 d6 10.Nc3, SÉRIE C
Interpolis 1980 – Round 1 – Karpov, Aleksandr – 1/2-1/2 – Tal, Mikhail – G34

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- 4...Bb7 5.Bd3 c5, E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E14a - 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 - Queen's Indian Defense: Spassky System, E14w - 6.O-O Be7 7.b3 O-O 8.Bb2 cxd4 9.exd4 d5, SÉRIE E
Interpolis 1980 – Round 1 – Karpov, Anatoly – 1-0 – Andersson, Ulf 1949 – G11

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- B20 - B99 - 1. e4 c5 - Sicilian Defense, B80-B85 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 Sicilian, Scheveningen variation, B87 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5 - Sicilian Defense: Sozin Attack, Flank Variation, B87 - 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
Interpolis 1980 – Round 1 – Kavalek, Lubomir – 1/2-1/2 – Andersson, Ulf 1949 – G21

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- 6.g3 Nc6, B20 - B99 - 1. e4 c5 - Sicilian Defense, B80 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense, B80-B85 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 Sicilian, Scheveningen variation, B80a - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 - Sicilian Defense: Scheveningen Variation, B80q - (not 7.Bg2), SÉRIE B 1.e4 2....
Interpolis 1980 – Round 1 – Kavalek, Lubomir – 1/2-1/2 – Spassky, Boris V. – G26

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