Chess puzzle (Checkmate)
Moves: 1. Nf3 g6 2. h4 Bg7 3. h5 d5 4. d4 Nc6 5. c3 Bg4 6. h6 Bf6 7. Qb3 Rb8 8. Bf4
Bxf3 9. gxf3 e6 10. e4 Be7 11. Bb5 Nf6 12. Nd2 O-O 13. O-O-O Na5 14. Qc2 a6 15.
Bd3 b5 16. e5 Nd7 17. Rdg1 Kh8 18. Bxg6 fxg6 19. Rxg6 Rxf4 20. Rg7 Rf5 21. Rh5
Qf8 22. Nf1 b4 23. Ng3 bxc3 24. Nxf5 cxb2+ 25. Kb1 Nc4 26. Rxh7+ Kxh7 27. Nxe7+
Qf5 28. Nxf5 *
Position (FEN): 1r6/2pn3k/p3p2P/3pPN1R/2nP4/5P2/PpQ2P2/1K6 b - - 0 28
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1427
Best move: Na3#