Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Open
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d6 5. Nc3 a6 6. Qf3 *
Position (FEN): r1bqkbnr/1p2pppp/p1np4/8/3NP3/2N2Q2/PPP2PPP/R1B1KB1R b KQkq - 1 6
Black to move.
Themes: Hanging Piece Opening  
Puzzle rating: 728
Best move: Nxd4