Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. d4 d5 3. c4 dxe4 4. Nc3 Nf6 5. Bg5 Nbd7 6. Nxe4 Be7 7. Nxf6+ Bxf6
8. Bxf6 Nxf6 9. Nf3 b6 10. g3 Bb7 11. Bg2 Rb8 12. O-O O-O 13. a4 c5 14. dxc5
Qxd1 15. Rfxd1 bxc5 16. a5 Rfd8 17. Ne5 Bxg2 18. Kxg2 Rd4 19. Rdb1 Ne4 20. Nc6
Rbd8 21. Nxd8 Rxd8 22. Rd1 Rd4 23. Rxd4 cxd4 24. Rd1 e5 25. f4 f6 26. fxe5 fxe5
27. Kf3 Nc5 28. b4 Na6 29. Rb1 Kf7 30. Ke4 Ke6 31. g4 g5 32. c5 h6 33. h3 Nc7
34. b5 Nd5 35. b6 axb6 36. Rxb6+ Nxb6 37. cxb6 Kd6 38. Kd3 Kc6 39. Kc4 Kb7 40.
Kb5 d3 41. a6+ Ka8 42. Kc6 d2 43. b7+ Kb8 44. Kb6 d1=Q *
Position (FEN): 1k6/1P6/PK5p/4p1p1/6P1/7P/8/3q4 w - - 0 45
White to move.
Themes: Advanced Pawn Endgame, Queen Endgame Mate in 1 
Puzzle rating: 646
Best move: a7#