Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Ragozin_Defense
Moves: 1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. Nf3 Bb4 5. Qc2 b6 6. e3 Bb7 7. Be2 O-O 8. a3
Bd6 9. cxd5 Nxd5 10. O-O c5 11. Rd1 Nd7 12. Nb5 Be7 13. Bc4 Rc8 14. Nc3 cxd4
15. Nxd5 Bxd5 16. b3 dxe3 17. fxe3 b5 18. Bb2 bxc4 19. Qc3 cxb3 *
Position (FEN): 2rq1rk1/p2nbppp/4p3/3b4/8/PpQ1PN2/1B4PP/R2R2K1 w - - 0 20
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 468
Best move: Qxg7#