Chess puzzle (Checkmate)
Moves: 1. Nf3 d5 2. g3 Bf5 3. Bg2 e6 4. O-O h6 5. d4 Bd6 6. c4 Nf6 7. Nc3 c6 8. c5 Bc7
9. b4 Nbd7 10. a4 O-O 11. Bb2 Ne4 12. Nxe4 Bxe4 13. b5 Rb8 14. Nd2 Bxg2 15.
Kxg2 Nf6 16. f3 Qd7 17. bxc6 bxc6 18. Bc3 Qd8 19. Qc2 Ba5 20. Rfb1 Bxc3 21.
Qxc3 Qc7 22. Ra3 Rxb1 23. Nxb1 Rb8 24. Rb3 Nd7 25. Qb2 Rxb3 26. Qxb3 Qb8 27.
Qxb8+ Nxb8 28. Nc3 Na6 29. e4 Nb4 30. exd5 exd5 31. f4 Nc2 32. Ne2 Ne3+ 33. Kf3
Nc4 34. h4 a5 35. f5 Nd2+ 36. Kf4 Nc4 37. g4 Kf8 38. g5 hxg5+ 39. hxg5 Ke7 40.
Nc3 Nb2 41. Ke5 *
Position (FEN): 8/4kpp1/2p5/p1PpKPP1/P2P4/2N5/1n6/8 b - - 4 41
Black to move.
Themes:  Endgame, Knight Endgame Mate in 1 
Puzzle rating: 1635
Best move: Nd3#