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- B20-B99 1. e4 c5 - Sicilian Defense, B30-B39 1.e4 c5 2. Nf3 Nc6 Sicilian defence, B36 - 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 - Sicilian Defense: Accelerated Dragon, Maróczy Bind, B36o - 10…* - Maroczy Bind, SÉRIE B 1.e4 2....
Petropolis Interzonal 1973 – Round 3 – Hort, Vlastimil – 1/2-1/2 – Mecking, Henrique – G9
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- E12-E19 1. d4 Nf6 2. c4 e6 3. Nf3 b6 Queen's Indian defence, E17 - 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 - Queen's Indian Defense: Traditional Variation, E17k - 7…Bf6 - Opovcensky (1969), SÉRIE E
Petropolis Interzonal 1973 – Round 3 – Reshevsky, Samuel – 1/2-1/2 – Smyslov, Vassily – G13
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- D43-D49 Queen's Gambit Declined semi-Slav1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6, D48 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 - Semi-Slav, D48m - 10…e5 - Meran, Reynolds (1946), SÉRIE D
Petropolis Interzonal 1973 – Round 4 – Polugaevsky, Lev – 1-0 – Biyiasas, Peter – G16
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- C90-C99 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 Ruy Lopez, closed, C93 - 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.h3 h6 - Spanish (1962), C93f - 11.Be3 - Closed, Smyslov (1963), SÉRIE C
Petropolis Interzonal 1973 – Round 5 – Savon, Vladimir Andreevichndreevich – 1/2-1/2 – Geller, Efim P – G21
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