Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Smith-Morra_Gambit
Moves: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 Bb4 6. Qd4 Bxc3+ 7. Qxc3 Nf6
8. Bg5 O-O 9. e5 h6 10. Bh4 g5 *
Position (FEN): rnbq1rk1/pp1p1p2/4pn1p/4P1p1/7B/2Q2N2/PP3PPP/R3KB1R w KQ - 0 11
White to move.
Themes:  Opening  
Puzzle rating: 1238
Best move: exf6