Chess puzzle (Crushing)
Moves: 1. e4 e5 2. Bc4 Nf6 3. f4 d5 4. exd5 exf4 5. Qe2+ Qe7 6. Qxe7+ Bxe7 7. Nf3 O-O
8. O-O Bd6 9. d4 Bf5 10. Ne5 Bxc2 11. Bxf4 Nbd7 12. Nc3 a6 13. Rae1 Nb6 14. b3
Nbd7 15. Bg5 b5 16. Bxf6 Nxf6 17. Bd3 b4 18. Bxc2 bxc3 19. Nc4 Nxd5 20. Nxd6
cxd6 21. Be4 Nb4 22. Bxa8 Rxa8 23. a3 Nc2 24. Rc1 Nxd4 25. Kf2 Rc8 26. b4 c2
27. Ke3 Nb3 28. Kd3 Nxc1+ 29. Rxc1 f5 30. Rxc2 Rxc2 31. Kxc2 Kf7 32. Kd3 Ke6
33. Kd4 g5 34. a4 h5 35. b5 axb5 36. axb5 Kd7 37. Kd5 f4 38. b6 g4 39. Ke4 f3
40. gxf3 gxf3 41. Kxf3 Kc6 42. Ke4 *
Position (FEN): 8/8/1Pkp4/7p/4K3/8/7P/8 b - - 2 42
Black to move.
Themes:  Endgame, Pawn Endgame  
Puzzle rating: 1424
Best move: Kxb6