Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Albin_Countergambit
Moves: 1. d4 d5 2. c4 e5 3. e3 c6 4. Nc3 exd4 5. exd4 Nf6 6. f4 Bd6 7. Nf3 O-O 8. Be2
Nh5 9. g3 Bh3 10. Kf2 Re8 11. cxd5 Nf6 12. dxc6 Ng4+ 13. Kg1 Nxc6 14. Ng5 Nxd4
15. Qxd4 Bc5 16. Qxc5 Rxe2 17. Nxe2 *
Position (FEN): r2q2k1/pp3ppp/8/2Q3N1/5Pn1/6Pb/PP2N2P/R1B3KR b - - 0 17
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 807
Best move: Qd1#