Chess puzzle (Checkmate)
Opening: Scotch_Game, Scotch_Game_Modern_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nc3 Bb4 6. Nb5 Ba5 7. Bd3 a6 8.
Na3 b5 9. Bd2 b4 10. Nd5 Nf6 11. Nc4 Nxe4 12. Nxa5 *
Position (FEN): r1b1k2r/2pp1ppp/p1n5/N2N4/1p2n2q/3B4/PPPB1PPP/R2QK2R b KQkq - 0 12
Black to move.
Themes: Attacking f2 or f7 Opening Mate in 1 
Puzzle rating: 1240
Best move: Qxf2#