Chess puzzle (Checkmate)
Moves: 1. d4 e6 2. c4 d5 3. g3 Nf6 4. Bg2 Be7 5. Nf3 O-O 6. O-O dxc4 7. Qc2 a6 8. a4
Nc6 9. Qxc4 Qd5 10. Qd3 Rd8 11. Nc3 Qa5 12. Bd2 Nb4 13. Qb1 c5 14. dxc5 Bxc5
15. Bg5 Be7 16. Rd1 Bd7 17. Bxf6 Bxf6 18. Ne4 Bc6 19. Nxf6+ gxf6 20. Qc1 Rxd1+
21. Qxd1 Rd8 22. Qc1 Qf5 23. Qc4 Qe4 24. Qc3 Nd5 25. Qd2 Rd7 26. Nd4 Qe5 27.
Nxc6 bxc6 28. Rc1 Rb7 29. Bxd5 cxd5 30. b4 Rb8 31. Rb1 Qe4 32. Rb2 a5 33. bxa5
Rxb2 34. Qxb2 Qxa4 35. Qb6 Qd1+ 36. Kg2 Qxe2 37. h4 f5 38. a6 f4 39. a7 f3+ 40.
Kh3 Qf1+ 41. Kg4 Qc4+ 42. Kg5 Qc1+ 43. Kg4 Qc4+ 44. Kxf3 *
Position (FEN): 6k1/P4p1p/1Q2p3/3p4/2q4P/5KP1/5P2/8 b - - 0 44
Black to move.
Themes:  Endgame, Queen Endgame Dovetail Mate, Mate in 1 
Puzzle rating: 1007
Best move: Qe4#