Chess puzzle (Checkmate)
Moves: 1. Nf3 Nf6 2. c4 g6 3. Nc3 c5 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 Bg7 7. e4 O-O 8.
Be2 d6 9. O-O a6 10. Be3 Bd7 11. b3 Rc8 12. Qd2 Qa5 13. Rac1 Ne5 14. f3 Rfe8
15. a4 Nc6 16. Nd5 Qxd2 17. Bxd2 Nxd5 18. cxd5 Nd4 19. Nxd4 Bxd4+ 20. Kh1 Rxc1
21. Rxc1 Rc8 22. Rxc8+ Bxc8 23. h4 Bf2 24. h5 gxh5 25. Kh2 h4 26. b4 Bg3+ 27.
Kg1 h3 28. b5 axb5 29. Bxb5 Kg7 30. a5 Kf6 31. Bc3+ Kg5 32. Bd2+ Bf4 33. Be1 h5
34. g3 Be3+ 35. Kh2 Kf6 36. Bc3+ Kg6 37. Bf1 h4 38. g4 Kg5 39. Kxh3 Kf4 40. Be2
Bf2 41. Bd2+ Ke5 42. Bg5 Be1 43. Bxe7 Bxa5 44. Bxh4 Bd2 45. Bg3+ Bf4 46. Kh4
Bd7 47. g5 b5 48. Bd1 b4 49. Bb3 Bb5 50. Kg4 Bxg3 51. Kxg3 Be2 52. Kf2 Bd1 53.
Ke3 Bxb3 *
Position (FEN): 8/5p2/3p4/3Pk1P1/1p2P3/1b2KP2/8/8 w - - 0 54
White to move.
Themes:  Bishop Endgame, Endgame Mate in 1 
Puzzle rating: 904
Best move: f4#