Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bb5 d6 4. O-O e5 5. c4 Ne7 6. Nc3 Bd7 7. d3 h6 8. Nd5 a6
9. Ba4 Nxd5 10. cxd5 Nd4 11. Nxd4 cxd4 12. Bxd7+ Qxd7 13. f4 Be7 14. fxe5 dxe5
15. Qf3 O-O 16. Qg3 Kh7 17. Qxe5 Bf6 18. Qf5+ Qxf5 19. Rxf5 Rae8 20. Bd2 Re5
21. Raf1 Rxf5 22. Rxf5 Re8 23. d6 Rd8 24. e5 Kg6 25. g4 Bg5 26. Bxg5 hxg5 27.
Kf2 f6 28. exf6 gxf6 29. Rd5 Kf7 30. Rxd4 Ke6 31. d7 Rxd7 32. Rxd7 Kxd7 33. Ke3
Kd6 34. Ke4 b5 35. Kf5 Ke7 36. d4 a5 37. d5 b4 38. b3 Kd6 39. Kxf6 Kxd5 40.
Kxg5 Kd4 41. Kf5 Kc3 42. g5 Kb2 43. g6 Kxa2 44. g7 Kxb3 45. g8=Q+ Ka3 46. Ke4
a4 47. Kd3 b3 48. Qg1 Ka2 49. Kc3 a3 50. Qd1 b2 51. Kc2 b1=Q+ *
Position (FEN): 8/8/8/8/8/p7/k1K4P/1q1Q4 w - - 0 52
White to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 406
Best move: Qxb1#