Chess puzzle (Checkmate)
Moves: 1. b3 c5 2. Bb2 Nc6 3. e3 d5 4. f4 a6 5. Nf3 Nf6 6. g3 Bg4 7. h3 Bxf3 8. Qxf3
Qc7 9. g4 e5 10. g5 Nd7 11. Qxd5 exf4 12. Qe4+ Be7 13. Nc3 O-O-O 14. Nd5 Qd6
15. Nxe7+ Qxe7 16. Qxe7 Nxe7 17. exf4 Nf5 18. Bd3 Rhe8+ 19. Kf2 g6 20. Bxf5
gxf5 21. Rhe1 Nf8 22. Rxe8 Rxe8 23. Re1 Rxe1 24. Kxe1 Ng6 25. Be5 Nxe5 26. fxe5
Kd7 27. Ke2 Ke6 28. Kf3 Kxe5 29. c3 b5 30. d3 b4 31. cxb4 cxb4 32. h4 a5 33. h5
f4 34. d4+ Kxd4 35. Kxf4 Kc3 36. Kf5 Kb2 37. Kf6 Kxa2 38. Kxf7 a4 39. g6 hxg6
40. hxg6 axb3 41. g7 b2 42. g8=Q b1=Q 43. Ke7+ Qb3 44. Qg2+ Qb2 45. Qd5+ Ka3
46. Kd6 b3 *
Position (FEN): 8/8/3K4/3Q4/8/kp6/1q6/8 w - - 0 47
White to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 920
Best move: Qa5#