Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 d6 3. d4 Bg4 4. Be2 Bxf3 5. Bxf3 Be7 6. d5 Nf6 7. c4 c6 8. Nc3
Qa5 9. Bd2 Qb6 10. Rb1 c5 11. Na4 Qa6 12. b4 b6 13. bxc5 bxc5 14. Qb3 O-O 15.
O-O h6 16. Be2 Qc8 17. f4 exf4 18. Bxf4 Nxe4 19. Qd3 f5 20. Nc3 Nxc3 21. Qxc3
Bf6 22. Qg3 g5 23. Bxd6 Bd4+ 24. Kh1 Re8 25. Bh5 Re3 26. Rf3 Rxf3 27. Qxf3 f4
28. Qe4 Nd7 29. Qg6+ Kh8 30. Qxh6+ Kg8 31. Qxg5+ Bg7 32. Re1 Nf6 33. Re7 Nxh5
34. Qxh5 Qf8 35. Qg5 Re8 36. Rxe8 Qxe8 37. Bxf4 *
Position (FEN): 4q1k1/p5b1/8/2pP2Q1/2P2B2/8/P5PP/7K b - - 0 37
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 641
Best move: Qe1#