Chess puzzle (Advantage)
Opening: Benoni_Defense, Benoni_Defense_Old_Benoni
Moves: 1. d4 c5 2. d5 g6 3. Nc3 Bg7 4. Bf4 Qb6 5. e4 *
Position (FEN): rnb1k1nr/pp1pppbp/1q4p1/2pP4/4PB2/2N5/PPP2PPP/R2QKBNR b KQkq - 0 5
Black to move.
Themes:  Opening  
Puzzle rating: 1441
Best move: Qxb2