Chess puzzle (Checkmate)
Opening: Trompowsky_Attack, Trompowsky_Attack_Other_variations
Moves: 1. d4 Nf6 2. Bg5 h6 3. Bxf6 exf6 4. e4 d5 5. c4 dxe4 6. Nc3 Bb4 7. Qa4+ Nc6 8.
d5 Bxc3+ 9. bxc3 O-O 10. dxc6 Re8 11. Ne2 e3 12. f3 *
Position (FEN): r1bqr1k1/ppp2pp1/2P2p1p/8/Q1P5/2P1pP2/P3N1PP/R3KB1R b KQ - 0 12
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 811
Best move: Qd2#