Chess puzzle (Checkmate)
Opening: Scotch_Game, Scotch_Game_Potter_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. Nc3 d6 7. f4 Nf6 8.
Bb5 a6 9. Bxc6+ bxc6 10. Qf3 Bg4 11. Qg3 Qe7 12. Nd2 O-O 13. h3 Bh5 14. b3 d5
15. e5 Nd7 16. Bb2 Bd4 17. Nf3 Be3 18. Ne2 Nc5 19. e6 Ne4 *
Position (FEN): r4rk1/2p1qppp/p1p1P3/3p3b/4nP2/1P2bNQP/PBP1N1P1/R3K2R w KQ - 1 20
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 1353
Best move: Qxg7#