Chess puzzle (Checkmate)
Moves: 1. d4 c5 2. Bf4 g6 3. Be5 f6 4. Bf4 cxd4 5. Qxd4 Qa5+ 6. Qc3 Qf5 7. Qxc8+ Kf7
8. e3 e5 9. Bc4+ Kg7 10. Bh6+ Nxh6 11. Qxb7 Qxc2 12. Nc3 Ng4 13. Nh3 Bc5 14.
O-O Bxe3 15. fxe3 Nxe3 16. Qxa8 Nxc4 17. Rac1 Qxb2 18. Ne4 Ne3 19. Nxf6 Nc6 20.
Qxh8+ Kxh8 21. Nf2 Nxf1 22. Rxf1 Nd4 23. Nxd7 Ne2+ 24. Kh1 Qb5 25. Rd1 Nf4 26.
Nf6 Qb6 27. N2e4 Qb2 28. Rd8+ Kg7 29. Rd7+ Kf8 30. Nxh7+ Ke8 *
Position (FEN): 4k3/p2R3N/6p1/4p3/4Nn2/8/Pq4PP/7K w - - 1 31
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1423
Best move: Nef6#