Chess puzzle (Crushing)
Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Nf6 5. Bc4 Bg4 6. d3 c6 7. Bd2 e6 8.
Nd5 Qd8 9. Nxf6+ Qxf6 10. Bc3 Bxf3 11. gxf3 Qg6 12. Qe2 Nd7 13. O-O-O O-O-O 14.
Rhg1 Qf5 15. Bxg7 Bxg7 16. Rxg7 Rdg8 17. Rdg1 Rxg7 18. Rxg7 Ne5 19. Rg1 Nxf3
20. Rh1 Nd4 21. Qe3 Rd8 22. c3 Nb5 23. Bxb5 Qxb5 24. Qxa7 Qxd3 25. Qa8+ Kc7 26.
Qa5+ Kb8 27. Qe5+ Qd6 28. Qxd6+ Rxd6 29. Rg1 Rd5 30. Rg7 Rf5 31. Rxh7 Rxf2 32.
h4 Kc7 33. h5 Kd6 34. h6 Ke7 35. Rh8 Rh2 36. Rb8 Rxh6 37. Rxb7+ Kf6 38. Rc7
Rh1+ 39. Kc2 Rh2+ 40. Kb3 e5 41. Rxc6+ Kf5 42. Rc4 f6 43. Rc5 Kf4 44. Rc4+ e4
45. Rd4 f5 46. a4 Rh6 47. a5 Ke3 48. Rd1 Ke2 49. Rd5 *
Position (FEN): 8/8/7r/P2R1p2/4p3/1KP5/1P2k3/8 b - - 4 49
Black to move.
Themes: Defensive Move Endgame, Rook Endgame  
Puzzle rating: 1397
Best move: f4