Chess puzzle (Advantage)
Opening: Modern_Defense, Modern_Defense_Other_variations
Moves: 1. d4 g6 2. e3 Bg7 3. c4 Nf6 4. Nf3 d5 5. cxd5 Nxd5 6. Bc4 c6 7. b3 b5 8. a4 *
Position (FEN): rnbqk2r/p3ppbp/2p3p1/1p1n4/P1BP4/1P2PN2/5PPP/RNBQK2R b KQkq - 0 8
Black to move.
Themes:  Opening  
Puzzle rating: 1049
Best move: bxc4