Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Nd4 5. Ba4 Bc5 6. d3 O-O 7. Bg5 h6 8. Bh4
d6 9. h3 c6 10. Qd2 Nxf3+ 11. gxf3 Nxe4 12. Nxe4 Qxh4 13. Nxc5 dxc5 14. Bb3 a5
15. a4 Qb4 16. O-O-O Qxd2+ 17. Kxd2 Re8 18. h4 Be6 19. Bxe6 Rxe6 20. Rhg1 Rd8
21. Rg4 Rd4 22. c3 Rxg4 23. fxg4 Rf6 24. Ke3 Rf4 25. d4 cxd4+ 26. cxd4 Rxg4 27.
dxe5 Rxa4 28. Rd8+ Kh7 29. Rd7 Kg6 30. Rxb7 Rb4 31. Rxb4 axb4 32. Kd4 Kf5 33.
Kc5 g5 34. h5 Kxe5 35. Kxc6 Kd4 36. Kb5 f5 37. Kxb4 g4 38. Ka5 f4 39. b4 g3 40.
fxg3 fxg3 41. b5 g2 42. b6 g1=Q 43. b7 Qg5+ 44. Ka6 Qf6+ 45. Ka7 Qe7 46. Ka8
Qa3+ 47. Kb8 Kc5 48. Kc7 Qa7 49. Kc8 Kc6 50. b8=Q *
Position (FEN): 1QK5/q7/2k4p/7P/8/8/8/8 b - - 0 50
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1570
Best move: Qd7#