Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. Bg5 Nbd7 4. Bxf6 Nxf6 5. cxd5 Nxd5 6. e4 Nb6 7. Nf3 Bg4
8. Qb3 Bxf3 9. gxf3 Qxd4 10. Nc3 O-O-O 11. Qxf7 *
Position (FEN): 2kr1b1r/ppp1pQpp/1n6/8/3qP3/2N2P2/PP3P1P/R3KB1R b KQ - 0 11
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 965
Best move: Qd2#