Chess puzzle (Checkmate)
Moves: 1. d4 g6 2. e4 Bg7 3. c3 d6 4. Bd3 Nf6 5. Ne2 O-O 6. Ng3 Nbd7 7. O-O c5 8. h3
b6 9. Qe2 e5 10. d5 a6 11. a4 Rb8 12. Na3 h6 13. Bxa6 Ne8 14. Bxc8 Qxc8 15. Nb5
f5 16. f3 Kh7 17. Nh1 Bf6 18. Be3 Bh4 19. Bf2 Bxf2+ 20. Nxf2 f4 21. Rfc1 h5 22.
b4 g5 23. a5 Rg8 24. Na7 Qb7 25. Nc6 Ra8 26. axb6 Rxa1 27. Rxa1 cxb4 28. cxb4
Qxb6 29. Ra6 Qe3 30. Qxe3 fxe3 31. Nd3 g4 32. hxg4 hxg4 33. Kf1 gxf3 34. gxf3
Nef6 35. Ke2 Rg2+ 36. Kxe3 Kh6 37. b5 Nh5 38. Ncb4 Ng3 39. Nc1 Nc5 40. Nbd3 *
Position (FEN): 8/8/R2p3k/1PnPp3/4P3/3NKPn1/6r1/2N5 b - - 6 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1828
Best move: Nf1#