Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nb6 5. Nf3 e6 6. Bd3 f6 7. O-O Bd6 8. e5
Be7 9. Qc2 Nd5 10. exf6 gxf6 11. Bxh7 f5 12. Bg6+ Kf8 13. Nc3 Nc6 14. Nxd5 Qxd5
15. Re1 Bf6 16. Be3 b6 17. Rad1 Bb7 18. Ne5 Nxe5 19. dxe5 *
Position (FEN): r4k1r/pbp5/1p2pbB1/3qPp2/8/4B3/PPQ2PPP/3RR1K1 b - - 0 19
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 1016
Best move: Qxg2#