Chess puzzle (Crushing)
Moves: 1. c4 c6 2. Nc3 d5 3. e3 Nf6 4. d4 e6 5. Nf3 g6 6. b3 Bg7 7. Be2 O-O 8. O-O b6
9. Bb2 Bb7 10. Rc1 Nbd7 11. Re1 Rc8 12. Qd2 c5 13. cxd5 Nxd5 14. Nxd5 Bxd5 15.
dxc5 Nxc5 16. Bxg7 Kxg7 17. Red1 Qf6 18. Qd4 Ne4 19. Qxf6+ Kxf6 20. Nd4 Nc3 21.
Rd3 Nxa2 22. Ra1 Nb4 23. Rd2 a5 24. f3 e5 25. e4 exd4 26. exd5 Rc5 27. Rxd4 Nc2
28. Rf4+ Ke5 29. Re4+ Kxd5 30. Rd1+ Kc6 31. Re7 Rc3 32. Rdd7 Kc5 33. Re5+ Kb4
34. Rb5+ Ka3 35. Bc4 Ne3 36. Bxf7 Rc2 37. g4 Rfc8 38. Bc4 Nxc4 39. bxc4 R8xc4
40. Rxb6 a4 41. Rd3+ R2c3 42. Rxc3+ Rxc3 43. Kg2 Rb3 44. Ra6 Rb4 45. Kg3 Kb2
46. f4 *
Position (FEN): 8/7p/R5p1/8/pr3PP1/6K1/1k5P/8 b - - 0 46
Black to move.
Themes:  Endgame, Rook Endgame  
Puzzle rating: 1374
Best move: a3