Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_McDonnell_Attack
Moves: 1. e4 c5 2. f4 Nc6 3. Nf3 b6 4. Bc4 Bb7 5. O-O e6 6. d4 cxd4 7. Nxd4 *
Position (FEN): r2qkbnr/pb1p1ppp/1pn1p3/8/2BNPP2/8/PPP3PP/RNBQ1RK1 b kq - 0 7
Black to move.
Themes:  Opening  
Puzzle rating: 1799
Best move: Nxd4