Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_McDonnell_Attack
Moves: 1. e4 c5 2. f4 d6 3. Nf3 Nf6 4. Nc3 Bg4 5. g3 Nc6 6. Bg2 Nd4 7. O-O g6 8. d3
Bg7 9. h3 Nxf3+ 10. Bxf3 Bxh3 11. Rf2 O-O 12. Rh2 Bg4 *
Position (FEN): r2q1rk1/pp2ppbp/3p1np1/2p5/4PPb1/2NP1BP1/PPP4R/R1BQ2K1 w - - 4 13
White to move.
Themes:  Middlegame  
Puzzle rating: 765
Best move: Bxg4