Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Old_Sicilian
Moves: 1. e4 c5 2. Nf3 Nc6 3. Nc3 d6 4. d4 e6 5. dxc5 d5 6. e5 Bxc5 7. Bd3 Qb6 8. O-O
Nge7 9. Na4 Qa5 10. Nxc5 Qxc5 11. b3 Ng6 12. Bf4 *
Position (FEN): r1b1k2r/pp3ppp/2n1p1n1/2qpP3/5B2/1P1B1N2/P1P2PPP/R2Q1RK1 b kq - 2 12
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 899
Best move: Nxf4