Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. f3 g6 3. e4 d6 4. Bc4 d5 5. Bd3 dxe4 6. Bxe4 Nxe4 7. fxe4 Bg7 8.
Nf3 Bg4 9. O-O O-O 10. Be3 Nc6 11. c3 b5 12. d5 Ne5 13. Na3 Nxf3+ 14. Rxf3 Bxf3
15. Qxf3 a6 16. Rd1 f5 17. Bd4 Bxd4+ 18. cxd4 fxe4 19. Qxe4 Qd6 20. Rf1 Rxf1+
21. Kxf1 Rf8+ 22. Ke2 Qf6 23. Kd3 Qf1+ 24. Kc3 Qc1+ 25. Kb3 Qd1+ 26. Kc3 Rf2
27. Qe6+ Kf8 28. Qc8+ Kf7 29. Qe6+ Kg7 30. Qxe7+ Rf7 31. Qe5+ Kh6 32. Qe3+ Kg7
33. Qe5+ Kf8 34. Qh8+ Ke7 35. Qe5+ Kf8 36. Qh8+ Ke7 37. Qe5+ Kd8 38. Qh8+ Kd7
39. Qe5 b4+ 40. Kxb4 Qd2+ 41. Kc5 Qxb2 42. Qe6+ Kd8 43. Qxf7 Qxa3+ 44. Kc4
Qxa2+ 45. Kc5 Qc2+ 46. Kb4 Qb2+ 47. Kc5 *
Position (FEN): 3k4/2p2Q1p/p5p1/2KP4/3P4/8/1q4PP/8 b - - 5 47
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1142
Best move: Qb5#