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

D40 - D42

D40 QGD: Semi-Tarrasch defence
1. d2d4 d7d5 2. c2c4 e7e6 3. b1c3 g8f6 4. g1f3 c7c5
D40 QGD: Semi-Tarrasch, symmetrical variation
1. d2d4 d7d5 2. c2c4 e7e6 3. b1c3 g8f6 4. g1f3 c7c5 5. e2e3 b8c6
6. f1d3 f8d6 7. 0-0 0-0
D40 QGD: Semi-Tarrasch, Levenfish variation
1. d2d4 d7d5 2. c2c4 e7e6 3. b1c3 g8f6 4. g1f3 c7c5 5. e2e3 b8c6
6. f1d3 f8d6 7. 0-0 0-0 8. d1e2 d8e7 9. d4c5 d6c5 10. e3e4
D40 QGD: Semi-Tarrasch defence, Pillsbury variation
1. d2d4 d7d5 2. c2c4 e7e6 3. b1c3 g8f6 4. g1f3 c7c5 5. c1g5
D41 QGD: Semi-Tarrasch, 5.cd
1. d2d4 d7d5 2. c2c4 e7e6 3. b1c3 g8f6 4. g1f3 c7c5 5. c4d5
D41 QGD: Semi-Tarrasch, Kmoch variation
1. d2d4 d7d5 2. c2c4 e7e6 3. b1c3 g8f6 4. g1f3 c7c5 5. c4d5 f6d5
6. e2e4 d5c3 7. b2c3 c5d4 8. c3d4 f8b4 9. c1d2 b4d2 10. d1d2 0-0
11. f1b5
D41 QGD: Semi-Tarrasch, San Sebastian variation
1. d2d4 d7d5 2. c2c4 e7e6 3. b1c3 g8f6 4. g1f3 c7c5 5. c4d5 f6d5
6. e2e4 d5c3 7. b2c3 c5d4 8. c3d4 f8b4 9. c1d2 d8a5
D41 QGD: Semi-Tarrasch with e3
1. d2d4 d7d5 2. c2c4 e7e6 3. b1c3 g8f6 4. g1f3 c7c5 5. c4d5 f6d5
6. e2e3
D42 QGD: Semi-Tarrasch, 7.Bd3
1. d2d4 d7d5 2. c2c4 e7e6 3. b1c3 g8f6 4. g1f3 c7c5 5. c4d5 f6d5
6. e2e3 b8c6 7. f1d3




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