Chess puzzle (Advantage)
Opening: Benoni_Defense, Benoni_Defense_Old_Benoni
Moves: 1. d4 c5 2. c3 cxd4 3. cxd4 d5 4. Bf4 g6 5. Nc3 Bg7 6. e4 dxe4 7. Nb5 Qa5+ *
Position (FEN): rnb1k1nr/pp2ppbp/6p1/qN6/3PpB2/8/PP3PPP/R2QKBNR w KQkq - 2 8
White to move.
Themes: Defensive Move Opening  
Puzzle rating: 2200
Best move: b4