Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bd3 O-O 6. Nge2 e5 7. d5 Nfd7 8. O-O
Nc5 9. Bc2 f5 10. exf5 Bxf5 11. Bxf5 Rxf5 12. Ng3 Rf8 13. Be3 Nbd7 14. Qd2 Nb6
15. b3 Nbd7 16. f4 exf4 17. Bxf4 Nf6 18. Bh6 Ng4 19. Rxf8+ Bxf8 20. Bxf8 Qxf8
21. Rf1 Qe7 22. Qd4 Nxh2 23. Kxh2 Rf8 24. Rxf8+ Qxf8 25. Kg1 Qh6 26. Nce2 b6
27. Nf4 Qg5 28. Nf1 h5 29. Ne6 Qe7 30. Qe3 a6 31. b4 Nb7 32. Nd2 Nd8 33. Nb3
Nxe6 34. Qxe6+ Qxe6 35. dxe6 Kf8 36. c5 Ke7 37. cxb6 cxb6 38. Nd4 g5 39. Kf2
Kf6 40. Kf3 b5 41. Ke4 h4 42. Kd5 Ke7 43. Nc6+ Ke8 44. e7 g4 45. Ke6 h3 46.
gxh3 gxh3 47. Nd4 h2 48. Nf5 h1=Q *
Position (FEN): 4k3/4P3/p2pK3/1p3N2/1P6/8/P7/7q w - - 0 49
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 833
Best move: Nxd6#