Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Colle_System
Moves: 1. d4 d5 2. e3 Nf6 3. Nf3 Bg4 4. c4 e6 5. a3 c5 6. dxc5 Bxc5 7. b4 Bd6 8. c5
Be5 9. Ra2 Ne4 10. Bd2 Qf6 11. Be2 O-O 12. Nxe5 *
Position (FEN): rn3rk1/pp3ppp/4pq2/2PpN3/1P2n1b1/P3P3/R2BBPPP/1N1QK2R b K - 0 12
Black to move.
Themes: Attacking f2 or f7 Opening Mate in 1 
Puzzle rating: 1240
Best move: Qxf2#