E04: Open Catalan: 5 Nf3

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 Nc6 6. Qa4 White threatens to win material: Qa4xc4 6... Bd7 7. Qxc4 Na5 8. Qd3 c5 9. O-O Bc6 10. Nc3 cxd4 11. Nxd4 Bc5 Black threatens to win material: Bc5xd4 12. Rd1 Bxg2 13. Qb5+ White forks: e8+c5 13... Nd7 14. Kxg2 a6 Black threatens to win material: a6xb5 15. Qd3 Rc8 16. Bg5 Be7 Not 16... Qxg5 17. Nxe6 Demolishes the pawn shield 17... Ne5 18. Nxg5 Nxd3 19. exd3+/- 17. Bxe7 Qxe7 18. Rac1 Nc4 19. Na4 b5 20. b3 O-O 21. bxc4 bxa4 22. Nc6 White threatens to win material: Nc6xe7 22... Rxc6 23. Qxd7 Qc5 24. Rc3 g6 25. Rb1 h5 25... Rfc8 26. Rb7 R6c7 27. Rxc7 Rxc7 28. Qxa4+/- 26. Rb7 e5 27. e4 Rf6 Black threatens to win material: Rf6xf2 28. Rc2 Qa3 28... Rc8 29. Qd3+/= 29. Qd1+/- Rd6 30. Rd2 Rfd8 31. Rd5 Rxd5 32. cxd5 Qxa2 33. Qf3 White has a mate threat 33... Rf8 34. Qd3 a3 White has to watch this pawn 35. Rb3 35. Ra7 h4 36. gxh4 Qb2+/= 35... f5= 36. Qxa6 Qxb3 37. Qxg6+ White forks: h5+g8 37... Kh8 38. Qh6+ Kg8 1/2-1/2 [Fritz 9 (10s)]