Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Nyezhmetdinov-Rossolimo_Attack
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bb5 Nd4 4. b3 *
Position (FEN): r1bqkbnr/pp1ppppp/8/1Bp5/3nP3/1P3N2/P1PP1PPP/RNBQK2R b KQkq - 0 4
Black to move.
Themes: Hanging Piece Opening  
Puzzle rating: 1281
Best move: Nxb5