Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 Nbd7 8. Nge2
a5 9. a4 Nc5 10. Ng3 Ne8 11. Be2 f5 12. exf5 Bxf5 13. Nxf5 Rxf5 14. g4 Rf8 15.
O-O Qe7 16. Qd2 e4 17. fxe4 Nxe4 18. Rxf8+ Kxf8 19. Nxe4 Qxe4 20. Rf1+ Kg8 21.
Rf4 Qb1+ 22. Qc1 Qxb2 23. Qxb2 Bxb2 24. h4 Be5 25. Rf1 Ng7 26. c5 Re8 27. Bb5
Bh2+ 28. Kf2 Rf8+ 29. Kg2 Rxf1 30. Kxf1 Bg3 31. cxd6 cxd6 32. Bf2 Bxf2 33. Kxf2
h5 34. Kf3 hxg4+ 35. Kxg4 Kf7 36. Bd3 Kf6 37. Kf4 Nf5 38. Bxf5 gxf5 39. h5 b6
40. h6 Kg6 41. h7 Kxh7 42. Kxf5 b5 43. axb5 a4 44. b6 a3 45. b7 a2 46. b8=Q
a1=Q 47. Qc7+ Kg8 48. Qd8+ Kf7 49. Qd7+ Kf8 50. Qxd6+ Ke8 51. Qc6+ Kd8 52. Ke6
Qe1+ 53. Kd6 *
Position (FEN): 3k4/8/2QK4/3P4/8/8/8/4q3 b - - 6 53
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 981
Best move: Qe7#