Chess puzzle (Checkmate)
Opening: Kings_Pawn_Game, Kings_Pawn_Game_Busch-Gass_Gambit
Moves: 1. e4 e5 2. Nf3 Bc5 3. Nxe5 Nc6 4. Nxc6 dxc6 5. Nc3 Nf6 6. h3 O-O 7. Bc4 Re8 8.
d3 b5 9. Bb3 b4 10. Na4 Nxe4 11. dxe4 Rxe4+ 12. Kf1 *
Position (FEN): r1bq2k1/p1p2ppp/2p5/2b5/Np2r3/1B5P/PPP2PP1/R1BQ1K1R b - - 1 12
Black to move.
Themes: Hanging Piece Opening Mate in 1 
Puzzle rating: 685
Best move: Qxd1#