Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Smith-Morra_Gambit
Moves: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 d6 5. Bc4 Nf6 6. h3 Nc6 7. Nf3 h6 8. O-O
a6 9. a4 e6 10. Re1 Be7 11. e5 d5 *
Position (FEN): r1bqk2r/1p2bpp1/p1n1pn1p/3pP3/P1B5/2N2N1P/1P3PP1/R1BQR1K1 w kq - 0 12
White to move.
Themes:  Opening  
Puzzle rating: 1312
Best move: exf6