Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 Be7 7. Bd3 O-O 8. Qc2
g6 9. Nf3 Nbd7 10. O-O Re8 11. Rab1 a5 12. a3 Nh5 13. Bh6 Ng7 14. b4 axb4 15.
axb4 Nf6 16. b5 Nf5 17. Bf4 Nh5 18. Be5 f6 19. bxc6 bxc6 20. Nxd5 cxd5 21. Bc7
Qd7 22. Bb5 Qe6 23. Bxe8 Ba6 24. Bb5 Bxb5 25. Rxb5 Nxe3 26. fxe3 Qxe3+ 27. Kh1
Nf4 28. Re1 Qd3 29. Qxd3 Nxd3 30. Rxe7 Ra1+ 31. Ng1 *
Position (FEN): 6k1/2B1R2p/5pp1/1R1p4/3P4/3n4/6PP/r5NK b - - 2 31
Black to move.
Themes:  Endgame Mate in 1, Smothered Mate 
Puzzle rating: 723
Best move: Nf2#