1. d2d4  1... g8f6  2. g1f3  2... d7d5  3. c2c4  3... e7e6  4. g2g3  4... f8e7  5. f1g2  5... e8g8  6. e1g1  6... d5c4  7. d1c2  7... a7a6  8. a2a4  8... c8d7  9. c2c4  9... d7c6  10. c1g5  10... b8d7  11. b1c3  11... h7h6 This is one of the main lines of the Catalan Opening. The next move is a small surprise, as it is much less common than taking the knight on f6. 12. g5f4 