Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Other_variations
Moves: 1. e4 e6 2. Bc4 c5 3. Nf3 Nc6 4. a3 Nf6 5. d3 d5 6. O-O *
Position (FEN): r1bqkb1r/pp3ppp/2n1pn2/2pp4/2B1P3/P2P1N2/1PP2PPP/RNBQ1RK1 b kq - 1 6
Black to move.
Themes:  Opening  
Puzzle rating: 1106
Best move: dxc4