Chess puzzle (Checkmate)
Opening: Alekhine_Defense, Alekhine_Defense_Other_variations
Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 e6 4. c4 Ne7 5. Nc3 d6 6. Nf3 dxe5 7. Nxe5 Nbc6 8.
Bf4 Qxd4 9. Qxd4 Nxd4 10. O-O-O Ndc6 11. Nb5 Nb4 *
Position (FEN): r1b1kb1r/ppp1nppp/4p3/1N2N3/1nP2B2/8/PP3PPP/2KR1B1R w kq - 4 12
White to move.
Themes:  Opening Mate in 1 
Puzzle rating: 969
Best move: Nxc7#