Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Open
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 a6 5. b3 Nf6 6. Bd3 *
Position (FEN): r1bqkb1r/1p1ppppp/p1n2n2/8/3NP3/1P1B4/P1P2PPP/RNBQK2R b KQkq - 2 6
Black to move.
Themes: Hanging Piece Opening  
Puzzle rating: 1161
Best move: Nxd4