Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Other_variations
Moves: 1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Nf3 a6 6. e3 O-O 7. Bd3 dxc4 8. Bxc4
b5 9. Bd3 Nc6 10. O-O Bb7 11. Re1 Nb4 12. Bb1 h6 13. Bf4 c5 14. a3 cxd4 15.
Nxd4 Nbd5 16. Be5 Nxc3 17. bxc3 Qd5 18. Bg3 *
Position (FEN): r4rk1/1b2bpp1/p3pn1p/1p1q4/3N4/P1P1P1B1/5PPP/RB1QR1K1 b - - 2 18
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 520
Best move: Qxg2#