Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. Bc4 Nf6 4. d3 h6 5. O-O Nc6 6. Nc3 Bg4 7. h3 h5 *
Position (FEN): r2qkb1r/ppp2pp1/2np1n2/4p2p/2B1P1b1/2NP1N1P/PPP2PP1/R1BQ1RK1 w kq - 0 8
White to move.
Themes:  Opening  
Puzzle rating: 1539
Best move: hxg4