Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 c6 3. Nf3 e6 4. Nc3 dxc4 5. Bg5 f6 6. Bh4 b5 7. a4 Bb4 8. e3 Bb7
9. axb5 cxb5 10. Be2 a6 11. O-O Ne7 12. Qd2 Nd5 13. Qc2 Nxc3 14. bxc3 Bd6 15.
e4 O-O 16. e5 fxe5 17. Bxd8 Rxd8 18. Nxe5 Bd5 19. f4 Nd7 20. Bf3 Nf6 21. Bxd5
exd5 22. g3 Ne4 23. Rfe1 Nf6 24. Ra2 a5 25. Rea1 a4 26. Qf5 Re8 27. Rb1 Ne4 28.
Qf7+ Kh8 29. Rxb5 Nxc3 30. Rbb2 Nxa2 31. Rxa2 a3 32. Qb7 Rab8 33. Qxd5 Rb1+ 34.
Kg2 Rb2+ 35. Rxb2 axb2 36. Nf7+ Kg8 37. Nxd6+ Kh8 38. Nf7+ Kg8 39. Nh6+ Kh8 40.
Qg8+ Rxg8 *
Position (FEN): 6rk/6pp/7N/8/2pP1P2/6P1/1p4KP/8 w - - 0 41
White to move.
Themes:  Endgame Mate in 1, Smothered Mate 
Puzzle rating: 1097
Best move: Nf7#