Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Closed
Moves: 1. e4 c5 2. Nc3 Nc6 3. Bb5 a6 4. Bxc6 bxc6 5. f4 e6 6. Nf3 Nf6 7. d3 Be7 8. O-O
O-O 9. Qe1 d5 10. Qg3 Bb7 11. f5 Bd6 *
Position (FEN): r2q1rk1/1b3ppp/p1pbpn2/2pp1P2/4P3/2NP1NQ1/PPP3PP/R1B2RK1 w - - 1 12
White to move.
Themes:  Opening  
Puzzle rating: 1239
Best move: e5