Chess puzzle (Crushing)
Moves: 1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. e3 d6 5. Be2 Nbd7 6. h3 O-O 7. d4 Re8 8. Nbd2
e5 9. dxe5 Nxe5 10. Nxe5 dxe5 11. Nc4 Nd7 12. O-O b6 13. Na3 Bb7 14. Bc4 Qg5
15. Bxf7+ Kxf7 16. Qxd7+ Re7 17. Qg4 Qxg4 18. hxg4 Rd8 19. f4 exf4 20. Rxf4+
Kg8 21. Bxg7 Kxg7 22. Raf1 Rd2 23. R4f2 Rxf2 24. Rxf2 Rxe3 25. Nc4 Re1+ 26. Kh2
Re4 27. Kh3 Bc8 28. Rd2 Rxg4 29. Kh2 Re4 30. Rd8 Be6 31. Re8 Bd5 32. Rc8 Bxc4
33. Rxc7+ Kh6 34. bxc4 a5 35. c5 bxc5 36. Rxc5 Ra4 37. Kh3 Rxa2 38. Kh4 a4 39.
g4 g5+ 40. Kg3 Ra1 41. Rc6+ Kg7 42. Rc7+ Kf6 43. Rxh7 Rc1 44. Rc7 a3 45. Ra7
Ra1 46. Ra6+ Kg7 47. Ra7+ Kf6 48. Ra6+ Ke7 49. Ra7+ Kd6 50. Ra6+ Kc7 51. Ra4 a2
52. Kf2 Kb6 53. Ra3 Kb5 54. Rb3+ *
Position (FEN): 8/8/8/1k4p1/6P1/1R6/p1P2K2/r7 b - - 5 54
Black to move.
Themes: Defensive Move Endgame, Rook Endgame  
Puzzle rating: 1627
Best move: Ka4