Chess puzzle (Checkmate)
Moves: 1. d4 e6 2. Bf4 Nc6 3. e3 g6 4. h3 a6 5. Nf3 Bg7 6. Bd3 Nf6 7. Nbd2 d6 8. e4 e5
9. Bg5 Nxd4 10. Bxf6 Bxf6 11. c3 Nxf3+ 12. Nxf3 Bg7 13. h4 O-O 14. h5 c6 15.
hxg6 fxg6 16. Nd2 Qf6 17. f3 Bg4 18. Qe2 Bh5 19. O-O-O b5 20. g4 Bxg4 21. fxg4
Qe6 22. Qh2 h6 23. g5 h5 24. Rdf1 Rxf1+ 25. Rxf1 Qxa2 26. Kc2 Rf8 27. Rxf8+
Bxf8 28. Qf2 c5 29. Qf6 Qa4+ 30. Kb1 Qd1+ 31. Ka2 Qxd2 32. Qxg6+ Bg7 33. Qe8+
Kh7 34. g6+ Kh6 35. Bb1 Qg5 36. Qc6 Qxg6 37. Qxa6 Qe8 38. Qxd6+ Kh7 39. Qxc5
Qa8+ 40. Kb3 *
Position (FEN): q7/6bk/8/1pQ1p2p/4P3/1KP5/1P6/1B6 b - - 2 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 873
Best move: Qa4#