Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Nc3 e6 3. Bf4 c6 4. e3 Nd7 5. a3 Ngf6 6. b4 b6 7. Nf3 a5 8. Na2
axb4 9. Nxb4 Rxa3 10. Nd3 Ra2 11. Qb1 Rxa1 12. Qxa1 Ne4 13. Nfe5 Nxe5 14. Nxe5
Bb4+ 15. Ke2 O-O 16. Nxc6 Qd7 17. Nxb4 Qb5+ 18. Nd3 Qc4 19. Qb2 Ba6 20. Kf3 g5
21. Bg3 f5 22. c3 h5 23. Ne5 Qxf1 24. Rxf1 Bxf1 25. Nd7 Ra8 26. Be5 Kf7 27.
Nxb6 Rb8 28. Bxb8 Kg6 29. Nd7 h4 30. Nf8+ Kh5 31. g4+ *
Position (FEN): 1B3N2/8/4p3/3p1ppk/3Pn1Pp/2P1PK2/1Q3P1P/5b2 b - g3 0 31
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 999
Best move: fxg4#