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Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...a6/4. Ba4/4...Nf6/5. O-O/5...Be7/6. Re1/6...b5/7. Bb3/7...d6/8. c3/8...O-O/9. h3/9...Na5

< Chess Opening Theory | 1. e4 | 1...e5 | 2. Nf3 | 2...Nc6 | 3. Bb5 | 3...a6 | 4. Ba4 | 4...Nf6 | 5. O-O | 5...Be7 | 6. Re1 | 6...b5 | 7. Bb3 | 7...d6 | 8. c3 | 8...O-O | 9. h3
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Chigorin Defense

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This is the old main line. Black chases white's bishop from the effective a2-g8 diagonal. Not only that, black opens up the c-pawn to expand on the queen side. Usually, after 10. Bc2 and 10…c5, if allowed, black will play 11…Nc6 and black ends up with a space advantage on the queen side.

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