Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O
O-O 9. Qe2 Bg6 10. Ne5 Nbd7 11. Nxg6 hxg6 12. Rd1 Qa5 13. Bd2 Rfd8 14. Nb1 Bxd2
15. Nxd2 Qb4 16. Qd3 c5 17. Qb3 Qxb3 18. Nxb3 cxd4 19. Nxd4 Ne5 20. Be2 a6 21.
Rac1 Rac8 22. f3 Nd5 23. Kf2 Nb4 24. Kf1 Kf8 25. f4 Nec6 26. Nxc6 Nxc6 27. Bf3
Ke7 28. Ke2 Rxd1 29. Rxd1 Rc7 30. Rc1 Nd4+ 31. Kd1 Rxc1+ 32. Kxc1 Nxf3 33. gxf3
Kf6 34. h4 e5 35. fxe5+ Kxe5 36. Kd2 Kf5 37. Kd3 g5 38. hxg5 Kxg5 39. Ke4 Kf6
40. Kd5 g5 41. Kd6 Kf5 42. Kc7 b5 43. a5 Ke5 44. Kb6 f5 45. Kxa6 g4 46. f4+ Kd6
47. Kb7 g3 48. a6 g2 49. a7 g1=Q 50. a8=Q Qg7+ 51. Kb8 *
Position (FEN): QK6/6q1/3k4/1p3p2/5P2/4P3/1P6/8 b - - 2 51
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1193
Best move: Qc7#