Chess puzzle (Checkmate)
Moves: 1. d4 c6 2. c4 d5 3. cxd5 cxd5 4. Nc3 Nc6 5. Nf3 Nf6 6. Bf4 Bf5 7. e3 e6 8. Bd3
Bd6 9. Bxd6 Bxd3 10. Qxd3 Qxd6 11. O-O O-O 12. Rac1 a6 13. Rfd1 b5 14. e4 dxe4
15. Nxe4 Nxe4 16. Qxe4 Rac8 17. d5 exd5 18. Rxd5 Qb4 19. Qb1 Ne7 20. Rxc8 Nxd5
21. Rxf8+ Qxf8 22. Qe4 Qd8 23. h3 h6 24. Qf5 a5 25. Ne5 Nf6 26. Nc6 Qd1+ 27.
Kh2 Qd6+ 28. Ne5 b4 29. f4 g6 30. Qc8+ Kg7 31. Qb7 Qd5 32. Qxd5 Nxd5 33. g3 a4
34. Nc6 Kf6 35. Kg2 Kf5 36. Kf3 f6 *
Position (FEN): 8/8/2N2ppp/3n1k2/pp3P2/5KPP/PP6/8 w - - 0 37
White to move.
Themes:  Endgame, Knight Endgame Mate in 1 
Puzzle rating: 1685
Best move: Nd4#