Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 h6 6. h3 d6 7. Nc3 O-O 8. Bd2
Nd4 9. Nxd4 Bxd4 10. Nd5 Nxd5 11. Bxd5 c6 12. Bb3 Be6 13. Bxe6 fxe6 14. Rb1 Qh4
15. Qe2 Rf6 16. c3 Bb6 17. d4 exd4 18. c4 Raf8 19. Be1 d3 20. Qd2 Bd4 21. Qxd3
Be5 22. f4 Qh5 23. Bc3 Rxf4 24. Bxe5 Rxf1+ 25. Rxf1 Rxf1+ 26. Kxf1 Qxe5 27. a4
Qxb2 28. Qxd6 Qb1+ 29. Kf2 Qxe4 30. Qb8+ Kh7 31. Qxb7 Qxc4 32. Qxa7 e5 33. a5
Qb5 34. a6 c5 35. Qb7 Qa5 36. a7 c4 37. a8=Q Qd2+ 38. Kg1 Qc1+ 39. Kf2 Qf4+ 40.
Qf3 Qd2+ 41. Qe2 Qf4+ 42. Qaf3 Qh4+ 43. Ke3 *
Position (FEN): 8/6pk/7p/4p3/2p4q/4KQ1P/4Q1P1/8 b - - 12 43
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 866
Best move: Qd4#