Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Smith-Morra_Gambit
Moves: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 h6 6. Bc4 b6 7. O-O g5 8. e5
g4 9. Nd4 Bb7 10. Qxg4 Ne7 11. Rd1 Rg8 12. Ncb5 Rxg4 *
Position (FEN): rn1qkb2/pb1pnp2/1p2p2p/1N2P3/2BN2r1/8/PP3PPP/R1BR2K1 w q - 0 13
White to move.
Themes:  Middlegame Mate in 1, Smothered Mate 
Puzzle rating: 1014
Best move: Nd6#