What is the strongest continuation for White?

Game on an iPhone.
Analysis of John Coffey vs. tChess

8 7 6 5 4 3 2 1 a b c d e f g h +1

(white to move) 1. Nf3 Nf6 2. d4 e6 3. c4 c5 4. e3 d5 5. Nc3 a6 6. Bd3 cxd4 7. Nxd4 e5 8. Nc2 Be6 9. cxd5 Nxd5 10. Nxd5 Bxd5 11. O-O e4 12. Be2 Be7 13. Nd4 O-O 14. f3 Nc6 15. fxe4 Bxe4 16. Bf3 Qd5 17. Nxc6 Qxc6 18. Bxe4 Qxe4 19. Qf3 Qxf3 20. gxf3 Rad8 21. e4 Bc5+ 22. Kg2 f6 23. Bf4 Bd4 24. Rab1 Rf7 25. Rfd1 Rfd7 26. Kf1 b6 27. Ke2 Rc8 28. b3 Rc3 29. Rbc1 Rxc1 30. Rxc1 Kf7 31. Be3 Bxe3 32. Kxe3 a5 33. Rc6 b5 34. Rb6 b4 35. Ra6 Rc7 36. Rxa5 Rc3+ 37. Kf4 Rc2 38. Kg3 Rd2 39. Ra4 Ke6 40. Rxb4 Rxa2 41. Rb6+ Kf7 42. Rb7+ Kg8 43. b4 Ra1 44. b5 Rg1+ 45. Kf2 Rd1 46. b6 Rd2+ 47. Kg3 Rd6 48. Rb8+ Kf7 49. b7 Rb6 50. Kf4 Rb2 51. Ke3 Rb3+ 52. Kd4 h6 53. Kc4 Rb1 54. f4 Kg6 55. e5 fxe5 56. fxe5 h5 57. e6 Rc1+ 58. Kd3 Rc7 59. Kd4 Kg5 60. Kd5 h4 61. Kd6

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Click here for 51... Kg6.