Chess puzzle (Checkmate)
Moves: 1. Nf3 d6 2. g3 Nf6 3. Bg2 g6 4. O-O Bg7 5. d3 O-O 6. c4 e5 7. Nc3 Re8 8. Bg5
h6 9. Bxf6 Bxf6 10. Nd2 Bg7 11. Rb1 a5 12. Qc2 Nc6 13. e3 Be6 14. a3 Qd7 15.
Rfe1 Bh3 16. Bh1 f5 17. Nd5 g5 18. b4 axb4 19. axb4 f4 20. b5 fxe3 21. fxe3 Nd8
22. b6 c6 23. Nc7 Ne6 24. Nxa8 Rxa8 25. Ne4 Rf8 26. Bg2 Bxg2 27. Qxg2 d5 28.
cxd5 cxd5 29. Nc3 e4 30. d4 g4 31. Ne2 Ng5 32. Nf4 Nf3+ 33. Kh1 Nxe1 34. Rxe1
Qb5 35. Qe2 Qxb6 36. Qxg4 Qa5 37. Re2 Rf7 38. Kg2 Qa1 39. Qe6 b5 40. Nxd5 *
Position (FEN): 6k1/5rb1/4Q2p/1p1N4/3Pp3/4P1P1/4R1KP/q7 b - - 0 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 859
Best move: Qf1#