Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_French_Variation
Moves: 1. e4 c5 2. Nf3 e6 3. Bc4 a6 4. O-O h6 5. c3 Nc6 6. d4 cxd4 7. cxd4 Qc7 8. d5
Ne5 9. Nxe5 Qxe5 10. dxe6 dxe6 11. Nc3 b5 12. f4 *
Position (FEN): r1b1kbnr/5pp1/p3p2p/1p2q3/2B1PP2/2N5/PP4PP/R1BQ1RK1 b kq - 0 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1637
Best move: Qc5+