Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nf6 5. Nc3 Bg4 6. Be2 Bxe2 7. Ngxe2 e6 8.
a3 Be7 9. O-O O-O 10. Kh1 Nbd7 11. f4 Nb6 12. Ng3 h6 13. f5 exf5 14. Nxf5 Nh7
15. Qg4 Bg5 16. h4 Bxc1 *
Position (FEN): r2q1rk1/ppp2ppn/1n5p/5N2/3PP1QP/P1N5/1P4P1/R1b2R1K w - - 0 17
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 850
Best move: Qxg7#