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- D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D55 - 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 - QGD, D55k - 8…c6 9.Bd3 Nd7 10.O-O dxc4 11.Bxc4 - Neo-Orthodox, Petrosian Variation (1938), SÉRIE D
Petropolis Interzonal 1973 – Round 16 – Ivkov, Borislav – 1/2-1/2 – Geller, Efim P – G70
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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, B83 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 - Sicilian, B83c - 7.* - Scheveningen, Modern, SÉRIE B 1.e4 2....
Petropolis Interzonal 1973 – Round 17 – Geller, Efim P – 1/2-1/2 – Panno, Oscar – G72
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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, B85 - 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Be7 8.f4 O-O 9.Be3 - Sicilian, B85b - 9…Qc7 - Scheveningen, Classical, Main Line (1904), SÉRIE B 1.e4 2....
Petropolis Interzonal 1973 – Round 17 – Smyslov, Vassily – 1-0 – Hort, Vlastimil – G73
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- B20-B99 1. e4 c5 - Sicilian Defense, B50-B59 Sicilian 1. e4 c5 2. Nf3 d6, B52 - 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 - Moscow Variation, Main Line, B52m - 7.O-O - Sicilian, Sokolsky (1959), SÉRIE B 1.e4 2....
Petropolis Interzonal 1973 – Round 2 – Gheorghiu, Florin – 1/2-1/2 – Hort, Vlastimil – G6
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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, C95 - 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 Nb8 10.d4 - Spanish, C95n - 16.* - Closed, Breyer, Main Line, SÉRIE C
Petropolis Interzonal 1973 – Round 2 – Keres, Paul – 1/2-1/2 – Reshevsky, Samuel – G8
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