1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. g2g3  4... d5c4  5. f1g2  5... c7c5  6. e1g1  6... b8c6  7. d4c5  7... d8d1  8. f1d1  8... f8c5  9. b1d2  9... c4c3 A common desperado idea: before leaving the board the pawn wants to make some damage to the opponent's pawn structure. 10. b2c3  10... e8g8  11. d2b3  11... c5e7  12. c3c4 In return White seizes space with this  potential weakness. 12... c8d7  13. c1b2  13... f8d8  14. f3d4  14... a8c8  15. d4b5  15... b7b6  16. b5d6 Gaining the bishop pair. 16... e7d6  17. d1d6  17... d7e8  18. d6d8  18... c6d8  19. a1c1  19... e8c6 Whereas So deals with the Catalan bishop. 20. c4c5  20... c6g2  21. g1g2  21... f6d7  22. c5b6 