Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Nc3 d5 3. Bf4 a6 4. e3 e6 5. Nf3 c5 6. dxc5 Bxc5 7. Bd3 Nc6 8. O-O
Qe7 9. e4 d4 10. Ne2 e5 11. Bg5 h6 12. Bh4 g5 13. Bg3 Bg4 14. Nd2 h5 15. f3 h4
16. Bf2 Be6 17. Bc4 O-O-O 18. Nc1 g4 19. Nd3 g3 20. hxg3 hxg3 21. Bxg3 Rdg8 22.
Kf2 Rxg3 23. Kxg3 Nxe4+ 24. fxe4 Qh4+ 25. Kf3 *
Position (FEN): 2k4r/1p3p2/p1n1b3/2b1p3/2BpP2q/3N1K2/PPPN2P1/R2Q1R2 b - - 2 25
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1400
Best move: Bg4#