Chess puzzle (Checkmate)
Opening: Kings_Pawn_Game, Kings_Pawn_Game_Beyer_Gambit
Moves: 1. e4 e5 2. d4 d5 3. dxe5 Nc6 4. exd5 Nxe5 5. Nc3 Bb4 6. Qd4 Bxc3+ 7. Qxc3 f6
8. f4 Qxd5 9. fxe5 fxe5 10. Bd2 Be6 11. O-O-O O-O-O 12. Bg5 *
Position (FEN): 2kr2nr/ppp3pp/4b3/3qp1B1/8/2Q5/PPP3PP/2KR1BNR b - - 5 12
Black to move.
Themes: Queenside Attack Opening Mate in 1 
Puzzle rating: 1107
Best move: Qxd1#