Chess puzzle (Crushing)
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 d5 6. cxd5 exd5 7. Bg5 Bf5 8.
e3 O-O 9. Bd3 Bxd3 10. Qxd3 Nbd7 11. Nf3 c6 12. O-O Qa5 13. c4 dxc4 14. Qxc4
Qd5 15. Qxd5 Nxd5 16. Rac1 a5 17. Nd2 Rfc8 18. Ne4 N7f6 19. Bxf6 Nxf6 20. Nd6
Rc7 21. Rb1 Rb8 22. a4 Nd5 23. Nc4 Nc3 24. Ra1 b6 25. Ra3 Nd5 26. Rb1 Ra7 27.
e4 Nb4 28. Ne3 g6 29. d5 cxd5 30. Nxd5 Nxd5 31. exd5 Rd7 32. Rb5 Kg7 33. Rab3
Rd6 34. g3 Kf6 35. Re3 Rbd8 36. Kg2 Rxd5 37. Rxb6+ R8d6 38. Reb3 Rd4 39. Rxd6+
Rxd6 40. Rb5 Ra6 41. Kf3 Ke6 42. Ke4 h5 43. h4 Kd6 44. Kd4 f6 45. Rc5 Ke6 46.
Kc4 Kd6 47. Kb5 Ra8 48. Rc6+ Ke7 49. Ra6 Rb8+ 50. Kxa5 Rb2 51. Rb6 Rxf2 52. Rb3
g5 53. hxg5 fxg5 54. Kb6 h4 55. gxh4 gxh4 56. a5 Rg2 *
Position (FEN): 8/4k3/1K6/P7/7p/1R6/6r1/8 w - - 1 57
White to move.
Themes: Advanced Pawn Endgame, Rook Endgame  
Puzzle rating: 1491
Best move: a6