Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 a6 3. g3 b6 4. Bg2 Bb7 5. Nc3 g6 6. O-O Bg7 7. Re1 e5 8. a3 Ne7
9. b4 O-O 10. bxc5 bxc5 11. d3 d6 12. a4 Nbc6 13. Rb1 Rb8 14. Bg5 h6 15. Be3
Nd4 16. Nd2 Qc7 17. Nc4 f5 18. Qd2 g5 19. Rb6 f4 20. Bxd4 exd4 21. Nd5 Bxd5 22.
Rxb8 Qxb8 23. exd5 Ng6 24. Re6 Ne5 25. Nxe5 Qb1+ 26. Bf1 Bxe5 27. Rxh6 Kg7 28.
Re6 Rf6 29. Qe2 f3 30. Qe4 Qd1 31. Re7+ Rf7 32. Re6 Rf6 33. Re7+ Rf7 34. Rxf7+
Kxf7 35. Qf5+ Bf6 36. Qe6+ Kg7 37. Qxd6 Qxc2 38. Qd7+ Kg6 39. d6 c4 40. Qe8+
Kg7 41. dxc4 d3 42. d7 d2 43. d8=Q Bxd8 44. Qxd8 d1=Q 45. Qxg5+ Qg6 46. Qe7+
Qf7 47. Qe5+ Qf6 48. Qc7+ Kg6 49. Qc5 Qxf1+ 50. Kxf1 *
Position (FEN): 8/8/p4qk1/2Q5/P1P5/5pP1/5P1P/5K2 b - - 0 50
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 593
Best move: Qa1#