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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 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 - Sicilian Defense: Scheveningen Variation, Classical Variation, B83 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense, SÉRIE B 1.e4 2....
Siegen olm 1970 – Round 1 – Browne, Walter S – 1/2-1/2 – Spassky, Boris V. – G2

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- 10...Nbd7 11.Nbd2 Bb7 — Main Line, 12.Bc2 Re8 13.Nf1 Bf8 14.Ng3 g6 15.b3 — Main Line, 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 d6 8. c3 O-O 9. h3 Nb8 10. d4 - Ruy Lopez: Closed, Breyer, SÉRIE C
Siegen olm 1970 – Round 10 – Spaete, Erwin – 1/2-1/2 – Ungnad, Rainer – G14

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- A10-A39 English Opening, A28 - 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d3 - English Opening: King's English Variation, Four Knights Variation, Flexible Line, A28 - 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4.... - English Opening, SÉRIE A
Siegen olm 1970 – Round 12 – Bobotsov, Milko G – 0-1 – Portisch, Lajos – G19

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- (not 9.Bxf6, 9.cxd5), 8.Rc1 Bb7 — Tartakower, D50-D69 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Queen's Gambit Declined, 4.Bg5, D58 - 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 - Queen's Gambit Declined: Tartakower Defense, SÉRIE D
Siegen olm 1970 – Round 13 – Portisch, Lajos – 1/2-1/2 – Spassky, Boris V. – G20

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