Chess puzzle (Checkmate)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Old_Variation
Moves: 1. d4 d5 2. c4 dxc4 3. e3 Qd5 4. Nc3 Qg5 5. e4 Qg6 6. Nf3 Bg4 7. Be2 Bxf3 8.
Bxf3 Nc6 9. Bf4 O-O-O 10. Qa4 Rxd4 11. Be3 e5 12. Bxd4 Nxd4 *
Position (FEN): 2k2bnr/ppp2ppp/6q1/4p3/Q1pnP3/2N2B2/PP3PPP/R3K2R w KQ - 0 13
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 949
Best move: Qe8#