Chess puzzle (Checkmate)
Opening: Ruy_Lopez, Ruy_Lopez_Berlin_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 d5 6. Nxe5 Qf6 7. Nxc6 bxc6
8. Ba4 Qxf2+ 9. Kh1 Bd6 10. Bxc6+ Kf8 11. d3 Bh3 12. Rg1 Qf4 13. Bxf4 *
Position (FEN): r4k1r/p1p2ppp/2Bb4/3p4/4nB2/3P3b/PPP3PP/RN1Q2RK b - - 0 13
Black to move.
Themes:  Middlegame Mate in 1, Smothered Mate 
Puzzle rating: 840
Best move: Nf2#