Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Lowenthal_Variation
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qe7 8.
Qxe7+ Ngxe7 9. Bd3 d5 10. exd5 Nxd5 11. O-O O-O 12. f4 exf4 13. Bxf4 Ncb4 14.
Bc4 *
Position (FEN): r1b2rk1/1p3ppp/p7/3n4/1nB2B2/8/PPP3PP/RN3RK1 b - - 2 14
Black to move.
Themes:  Middlegame  
Puzzle rating: 1750
Best move: Nxf4