Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Bf4 a6 6. e3 Nc6 7. Bd3 e6 8. Rc1
Bd6 9. Bxd6 Qxd6 10. f4 Bd7 11. Nf3 Nb4 12. Bb1 Bb5 13. a3 Nc6 14. Nxb5 axb5
15. O-O O-O 16. Ne5 b4 17. a4 Na5 18. f5 Rac8 19. Rxc8 Rxc8 20. fxe6 fxe6 21.
Qf3 Nc4 22. Rc1 Rc7 23. Nxc4 Rxc4 24. Rxc4 dxc4 25. Qxb7 Nd5 26. Qc8+ Kf7 27.
Qxc4 Nxe3 28. Qd3 Nf5 29. a5 Qxd4+ 30. Qxd4 Nxd4 31. a6 Nb5 32. Bd3 Na7 33. Kf2
h6 34. Ke3 e5 35. Ke4 Ke6 36. Bc4+ Kd6 37. Kf5 Kc5 38. b3 Kd4 39. Ke6 e4 40.
Kd7 e3 41. Kc7 Kc5 42. Kb7 Nc6 43. a7 Na5+ 44. Kc7 Nxc4 45. bxc4 e2 46. a8=Q
e1=Q *
Position (FEN): Q7/2K3p1/7p/2k5/1pP5/8/6PP/4q3 w - - 0 47
White to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1938
Best move: Qd5#