Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. Bc4 g6 4. b4 Bg7 5. a4 Nf6 6. Ba3 O-O 7. d3 Bg4 8. h3
Bxf3 9. Qxf3 Nc6 10. c3 Ne7 11. b5 d5 12. exd5 Re8 13. g4 g5 14. O-O Nexd5 15.
h4 h6 16. hxg5 hxg5 17. Kg2 Qd7 18. Nd2 Qxg4+ *
Position (FEN): r3r1k1/ppp2pb1/5n2/1P1np1p1/P1B3q1/B1PP1Q2/3N1PK1/R4R2 w - - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 668
Best move: Qxg4