PGN
1. d4 e6 2. Nf3 Nf6 3. c4 b6 4. a3 Ba6 5. Qc2 Bb7 6. Nc3 c5 7. e4 cxd4 8. Nxd4
Bc5 9. Nb3 Nc6 10. Nxc5 bxc5 11. Bf4 Nd4 12. Qd3 Qa5 13. f3 d5 14. cxd5 exd5
15. e5 Nh5 16. Be3 Nb3 17. Qb5+ Qxb5 18. Nxb5 Nxa1 19. Nd6+ Ke7 20. Nxb7 Nc2+
21. Kd2 Nxe3 22. Kxe3 g5 23. Nxc5 Nf4 24. g3 Ne6 25. Nxe6 fxe6 26. f4 gxf4+ 27.gxf4 Rab8 28. b4 Rbc8 29. Kd4 Rc1 30. Rg1 Rhc8 31. Rg7+ Kf8 32. Rxh7 Rd1+ 33.Ke3 Kg8 34. Re7 Rxf1 35. Rxe6 Rcc1 36. Rd6 Rce1+ 37. Kd4 Rd1+ 38. Kc5 Rxf4 39.Rxd5 Rxd5+ 40. Kxd5 Kf7 41. Kd6 Rh4 42. e6+ Ke8 43. Kc6 Rxh2 44. a4 Ke7 45. Kb7
Ra2 46. a5 Rb2 47. Kxa7 Rxb4 48. a6
My detailed analysis is here:
http://blog.chess.com/philidor_position/this-is-it-how-to-draw-a-completely-won-ending3