Aside from the blunder 27 Nh3, what moves should have been made to make this game winning for white?
rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Qd2 a6 8. a4 e5 9. d5 Na5 10. Ra3 b6 11. b4 Nb7 12. h4 a5 13. b5 h5 14. Be2 Nh7 15. g4 hxg4 16. fxg4 f5 17. gxf5 gxf5 18. Bg5 Bf6 19. Bh6 Bxh4+ 20. Kd1 Bg5 21. Bxg5 Qxg5 22. Qxg5+ Nxg5 23. Nf3 Nxf3 24. Bxf3 f4 25. Ne2 Rf7 26. Ng1 Rh7 27. Nh3 Bxh3 28. Be2 Bd7 29. Rg1+ Kh8 30. Ke1 Rg8 31. Kf1 Rh3 32. Ra1 Rxg1+ 33. Kxg1 Nc5 34. Re1 Rg3+ 35. Kf2 Nxe4+ 36. Kf1 Bh3# 0-1
11. b4
. Black's knight is out of play ata5.
– Dag Oskar Madsen Jan 16 '15 at 23:14