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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, B83l - 6…Nc6 7.O-O Be7 8.Be3 O-O 9.f4 Bd7 10.Qe1 - Scheveningen, Modern (1934), SÉRIE B 1.e4 2....
Siegen olm 1970 – Round 1 – Browne, Walter Shawn – 1/2-1/2 – Spassky, Boris V. – G2
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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D90 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 - Grünfeld Defense: Three Knights Variation (1946), D90m - 4…Bg7 5.cxd5 Nxd5 6.Bd2 O-O - Gruenfeld: Three Knights Exchange (1948), SÉRIE D
Siegen olm 1970 – Round 10 – Najdorf, Miguel – 1/2-1/2 – Portisch, Lajos – G13
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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, C95l - 10…Nbd7 11.Nbd2 Bb7 12.Bc2 Re8 13.Nf1 Bf8 14.Ng3 g6 - Closed, Breyer, Main Line (1955), SÉRIE C
Siegen olm 1970 – Round 10 – Spaete, Erwin – 1/2-1/2 – Ungnad, Rainer – G14
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- B20-B99 1. e4 c5 - Sicilian Defense, B40-B49 1. e4 c5 2. Nf3 e6 Sicilian defence, B42 - 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 - Sicilian Defense: Kan Variation, Modern Variation, B42j - 5…Nf6 6.O-O d6 7.c4 - Kan (1960), SÉRIE B 1.e4 2....
Siegen olm 1970 – Round 11 – Fischer, Raphael – 1-0 – Najdorf, Miguel – G17
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- D70 - 1.d4 Nf6 2.c4 g6 3.f3 d5 - Neo-Grünfeld Defense: Goglidze Attack (1933), D70-D79 1. d4 Nf6 2. c4 g6 3. f3 d5 Neo-Gruenfeld defence, D70i - 4.cxd5 Nxd5 5.e4 Nb6 6.Nc3 Bg7 7.Be3 O-O - Neo-Gruenfeld: Alekhine’s, SÉRIE D
Siegen olm 1970 – Round 11 – Larsen, Bent – 1-0 – Scholl, Eckhard – G16
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- E60-E99 1. d4 Nf6 2. c4 g6 King's Indian defence, E90 - 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 - King's Indian Defense: Normal Variation, Rare Defenses, E90r - 5…O-O 6.h3 e5 7.d5 Nbd7 8.Bg5 - King’s Indian (1954), SÉRIE E
Siegen olm 1970 – Round 12 – Larsen, Bent – 1-0 – Kagan, Shimon – G18
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