Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Other_variations
Moves: 1. d4 d5 2. c4 e6 3. a3 Nc6 4. Nc3 Nxd4 5. Qxd4 b6 6. cxd5 Bc5 7. Qd1 Bb7 8.
dxe6 Bxf2+ 9. Kxf2 Qh4+ 10. Ke3 Rd8 11. exf7+ Ke7 12. Qb3 *
Position (FEN): 3r2nr/pbp1kPpp/1p6/8/7q/PQN1K3/1P2P1PP/R1B2BNR b - - 2 12
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1157
Best move: Qd4#