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- B20 - B99 - 1. e4 c5 - Sicilian Defense, B60-B69 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Sicilian, Richter-Rauzer, B67 - 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4.... - Sicilian Defense, B67a - Richter-Rauzer, 7…a6 8.O-O-O Bd7, B67c - Richter-Rauzer, 7…a6, 9.f3, SÉRIE B 1.e4 2....
Tallinn 1973 – Round 1 – Tal, Mikhail – 1/2-1/2 – Balashov, Yuri S – G27

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- 8.O-O O-O — Main Line, D30-D39 1. d4 d5 2. c4 e6 Queen's gambit declined, D34a - 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 - Tarrasch Defense: Prague Variation, Main Line, D34d - 9.b3 (not 9...Ne4), SÉRIE D
Tallinn 1973 – Round 1 – Timman, Jan H – 1/2-1/2 – Keres, Paul Petrovich – G42

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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, B89 - 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Be3 - Sicilian Defense: Sozin Attack, Main Line, SÉRIE B 1.e4 2....
Tallinn 1973 – Round 1 – Westerinen, Heikki M.J. – 1/2-1/2 – Polugaevsky, Lev – G30

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