Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. Nf3 Bg4 4. h3 Bxf3 5. exf3 c6 6. Be2 h6 7. Nc3 Nbd7 8.
Qa4 e5 9. O-O exd4 10. Nd1 Bd6 11. cxd5 Nxd5 12. Bc4 O-O 13. Bxd5 cxd5 14. Qxd4
Qc7 15. b3 Nf6 16. Bb2 Rfe8 17. Nc3 a6 18. Nxd5 Nxd5 *
Position (FEN): r3r1k1/1pq2pp1/p2b3p/3n4/3Q4/1P3P1P/PB3PP1/R4RK1 w - - 0 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 595
Best move: Qxg7#