Chess puzzle (Checkmate)
Moves: 1. e4 d5 2. e5 d4 3. Nf3 Nc6 4. c3 d3 5. Qa4 Qd5 6. c4 Qe4+ 7. Kd1 Bg4 8. Rg1
O-O-O 9. Nc3 Qg6 10. Rh1 Qh5 11. Ke1 Bxf3 12. gxf3 Nd4 13. Bg2 Nc2+ 14. Kd1
Nxa1 15. Qxa7 Qxe5 16. Qa8+ Kd7 17. Qxb7 Nf6 18. Re1 Qxh2 19. f4 Rc8 20. Nb5
Nc2 21. Na7 Rb8 22. Bc6+ Kd6 23. c5+ Kxc5 24. Re5+ Kd4 25. Nb5+ Kc4 26. b3+ Kb4
27. Nxc7+ Rxb7 *
Position (FEN): 5b1r/1rN1pppp/2B2n2/4R3/1k3P2/1P1p4/P1nP1P1q/2BK4 w - - 0 28
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1811
Best move: Na6#