I forgot to offer a draw

This game is a kind of follow up to last weeks game at the ANU Chess Club. It was the same opening at the start (Closed Sicilian) although I played it a little more flexibly this time. For a while I was toying with the idea of landing a piece on f5, but this was both unsound and unnecessary. Instead I just kept the position under control and took advantage of the opportunities as they arose.
The key moment was when I was able to play 29.g5, although 29.Rxf6! was even stronger, as g5 then wins back the rook due to the pin after Qxe5. After that it was just a matter of eliminating pieces, avoiding tricks, and finally finding the forced mate at the end.

Press,Shaun - de Noskowski,Adrian [B26]
ANU Autumn Swiss, 18.05.2016

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nge2 e6 7. O-O Rb8 8. Be3 b5 9. Qd2 b4 10. Nd1 Nge7 11. Bh6 O-O 12. Bxg7 Kxg7 13. f4 e5 14. fxe5 dxe5 15. Ne3 f6 16. g4 Be6 17. Rad1 Nd4 18. Ng3 a5 19. c3 Ndc6 20. c4 Nd4 21. h3 Qd7 22. Nd5 Nc8 23. Rf2 Bxd5 24. exd5 Nd6 25. Rdf1 Qa4 26. b3 Qd7 27. Ne2 Nxe2+ 28. Qxe2 a4 29. g5 axb3 30. gxf6+ Kf7 31. axb3 Nf5 32. Qxe5 Rfe8 33. Qf4 Rb6 34. Be4 Rxf6 35. Qg5 Re5 36. Bxf5 gxf5 37. Qh5+ Rg6+ 38. Kh1 Kg7 39. Rxf5 Rxf5 40. Rxf5 Qa7 41. Rf1 Qa2 42. Qe5+ Kh6 43. Qe3+ Kg7 44. Qe7+ Kh6 45. Qf8+ Kh5 46. Rf5+ Kh4 47. Qe7+ Kg3 48. Qe1+ Kxh3 49. Rf3+ Kg4 50. Qg3+ Kh5 51. Qh3+ Kg5 52. Rf5# 1-0