1. d2d4  1... d7d5  2. c2c4  2... e7e6  3. g1f3  3... g8f6  4. g2g3 Here we have, once again, the ever-present Catalan Opening. 4... d5c4  5. f1g2  5... c7c5  6. d1a4  6... c8d7 All coverages are possible here. It'ss quite possible that this is not the best of them. 7. a4c4  7... d7c6  8. d4c5  8... b8d7  9. c1e3  9... a8c8  10. b2b4  10... b7b6  11. e1g1  11... b6c5  12. b4b5  12... c6b7  13. f1d1  13... f8e7  14. a2a4  14... e8g8  15. a4a5 The pawn structure favors White with his threatening pawns on the queen flank. 15... d7b6 An ingenious attempt but not enough. 16. c4c2  16... b6d5  17. e3d2  17... d8e8  18. c2c4 This is a clear mistake. 18... d5b4 Now Black gets good counterplay. 19. b1a3  19... f6e4  20. d2f4  20... b7d5  21. c4c1  21... c5c4  22. f3e5 This is actually a losing move. 22... e4c5  23. e5c4 Based on an accurate calculation. 23... d5g2  24. c4d6 Intermediate moves are the most difficult in chess. 24... e7d6  25. f4d6  25... c5b3 A decisive miscalculation. 26. c1b2  26... b3a1  27. d6b4  27... g2a8  28. d1a1  28... e8d7  29. b4f8  29... c8f8  30. a1c1 White has emerged from the complications with a solid extra pawn. 30... a7a6  31. b5b6 