Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 h5 2. e4 h4 3. Bc4 c6 4. Nc3 e6 5. d5 exd5 6. exd5 cxd5 7. Qxd5 Qf6 8.
Bg5 Qe6+ 9. Nge2 Qxd5 10. Nxd5 Na6 11. Bxa6 bxa6 *
Position (FEN): r1b1kbnr/p2p1pp1/p7/3N2B1/7p/8/PPP1NPPP/R3K2R w KQkq - 0 12
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 837
Best move: Nc7#