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ECO CODES
(Click on an opening description to see diagram)

C66 - C66

C66 Ruy Lopez: Berlin defence, 4.O-O, d6
1. e2e4 e7e5 2. g1f3 b8c6 3. f1b5 g8f6 4. 0-0 d7d6
C66 Ruy Lopez: Berlin defence, hedgehog variation
1. e2e4 e7e5 2. g1f3 b8c6 3. f1b5 g8f6 4. 0-0 d7d6 5. d2d4 c8d7
6. b1c3 f8e7
C66 Ruy Lopez: Berlin defence, Tarrasch trap
1. e2e4 e7e5 2. g1f3 b8c6 3. f1b5 g8f6 4. 0-0 d7d6 5. d2d4 c8d7
6. b1c3 f8e7 7. f1e1 0-0
C66 Ruy Lopez: closed Berlin defence, Bernstein variation
1. e2e4 e7e5 2. g1f3 b8c6 3. f1b5 g8f6 4. 0-0 d7d6 5. d2d4 c8d7
6. b1c3 f8e7 7. c1g5
C66 Ruy Lopez: closed Berlin defence, Showalter variation
1. e2e4 e7e5 2. g1f3 b8c6 3. f1b5 g8f6 4. 0-0 d7d6 5. d2d4 c8d7
6. b1c3 f8e7 7. b5c6
C66 Ruy Lopez: closed Berlin defence, Wolf variation
1. e2e4 e7e5 2. g1f3 b8c6 3. f1b5 g8f6 4. 0-0 d7d6 5. d2d4 c8d7
6. b1c3 e5d4
C66 Ruy Lopez: closed Berlin defence, Chigorin variation
1. e2e4 e7e5 2. g1f3 b8c6 3. f1b5 g8f6 4. 0-0 d7d6 5. d2d4 f6d7




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