Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Nyezhmetdinov-Rossolimo_Attack
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bb5 Nd4 4. O-O *
Position (FEN): r1bqkbnr/pp1ppppp/8/1Bp5/3nP3/5N2/PPPP1PPP/RNBQ1RK1 b kq - 5 4
Black to move.
Themes: Hanging Piece Opening  
Puzzle rating: 1557
Best move: Nxb5