Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. Be2 Qb6 7. Qb3 Nh6 8. Bxh6
gxh6 9. Nbd2 Rg8 10. O-O c4 11. Qc2 Rh8 12. a4 a6 13. h3 O-O-O 14. b4 cxb3 15.
Nxb3 Kb8 16. Nc5 Bxc5 17. Rab1 Qa5 18. dxc5 Ka7 19. Rb3 Rb8 20. Rfb1 Qc7 21.
Nd4 Nxe5 22. c6 Nxc6 23. Nxc6+ Bxc6 24. Qd3 Qa5 25. Qd4+ Ka8 26. Rxb7 Bxb7 27.
Rxb7 Kxb7 28. c4 Qb6 29. c5 Qc6 30. Qg7 Qd7 31. Qc3 Qxa4 32. c6+ Qxc6 33. Qb2+
Ka7 34. Qd4+ Qb6 35. Qg7 Qc7 36. Qd4+ Ka8 37. Bxa6 Rb1+ 38. Bf1 Rhb8 39. Qa4+
Kb7 *
Position (FEN): 1r6/1kq2p1p/4p2p/3p4/Q7/7P/5PP1/1r3BK1 w - - 5 40
White to move.
Themes:  Endgame Dovetail Mate, Mate in 1 
Puzzle rating: 894
Best move: Qa6#