Chess puzzle (Checkmate)
Moves: 1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. g3 dxc4 5. Qa4+ Nc6 6. Bg2 Bd7 7. Qxc4 a6 8. a4
Nb4 9. Ne4 b5 10. axb5 Bxb5 11. Nxf6+ Qxf6 12. Qxc7 Rd8 13. Nf3 Bd6 14. Qc3 h6
15. O-O Bxe2 16. Re1 Bxf3 17. Bxf3 O-O 18. Bb7 Rb8 19. Bxa6 Ra8 20. Bf4 Nd5 21.
Be5 Qf5 22. Qc6 Bxe5 23. Rxe5 Qg4 24. Qc4 Rfc8 25. Bxc8 Rxa1+ 26. Kg2 *
Position (FEN): 2B3k1/5pp1/4p2p/3nR3/2QP2q1/6P1/1P3PKP/r7 b - - 1 26
Black to move.
Themes: Pin Endgame Mate in 1 
Puzzle rating: 1317
Best move: Nf4#