Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2
Nc6 9. O-O-O d5 10. Kb1 e5 11. Nxc6 bxc6 12. exd5 cxd5 13. Nxd5 Nxd5 14. Qxd5
Qc7 15. Qc5 Qb7 16. Qd5 Qc7 17. Qxa8 Bf5 18. Qxf8+ Bxf8 19. Bd3 Be6 20. Rhe1
Qa5 21. b3 Bb4 22. Re2 Bc3 23. Bc1 Qc5 24. Bb2 a5 25. a4 Bxb2 26. Kxb2 Kg7 27.
Be4 f5 28. Bd3 Kf6 29. Rde1 Qd4+ 30. Ka3 Qc5+ 31. Kb2 Qd4+ 32. Ka3 Qc5+ 33. Kb2
Qd4+ 34. Ka3 Qc3 35. Rxe5 Bxb3 36. cxb3 Qxd3 37. f4 Qd4 38. Re6+ Kg7 39. h4
Qxf4 40. h5 Kh6 41. hxg6 hxg6 42. R1e3 Qb4+ 43. Kb2 Qd2+ 44. Ka3 Qb4+ 45. Kb2
Qg4 46. g3 Kg5 47. R6e5 Qd4+ 48. Ka3 *
Position (FEN): 8/8/6p1/p3Rpk1/P2q4/KP2R1P1/8/8 b - - 4 48
Black to move.
Themes:  Endgame, Queen and Rook Endgame Mate in 1 
Puzzle rating: 1478
Best move: Qa1#