Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Delayed_Alapin
Moves: 1. e4 c5 2. Nf3 d6 3. c3 e5 4. h3 Nf6 5. d3 Nc6 6. Be2 h6 7. O-O Nh7 8. Be3 g5
9. Nh2 f5 10. exf5 Bxf5 11. Bg4 Ne7 12. Bh5+ Ng6 *
Position (FEN): r2qkb1r/pp5n/3p2np/2p1pbpB/8/2PPB2P/PP3PPN/RN1Q1RK1 w kq - 4 13
White to move.
Themes:  Middlegame  
Puzzle rating: 1719
Best move: g4