Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Traditional_Variation
Moves: 1. d4 Nf6 2. c4 e6 3. Bg5 d5 4. Nf3 c5 5. e3 cxd4 6. exd4 Bb4+ 7. Nc3 O-O 8.
cxd5 exd5 9. Qb3 Re8+ 10. Be2 Bxc3+ 11. bxc3 Qe7 12. Bxf6 *
Position (FEN): rnb1r1k1/pp2qppp/5B2/3p4/3P4/1QP2N2/P3BPPP/R3K2R b KQ - 0 12
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 626
Best move: Qxe2#