Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Schlechter_Variation
Moves: 1. e4 e6 2. d4 d5 3. Bd3 Nf6 4. Nd2 Bb4 5. c3 Ba5 6. Ngf3 c5 7. dxc5 Nc6 8. O-O
O-O 9. Nb3 *
Position (FEN): r1bq1rk1/pp3ppp/2n1pn2/b1Pp4/4P3/1NPB1N2/PP3PPP/R1BQ1RK1 b - - 4 9
Black to move.
Themes:  Opening  
Puzzle rating: 1212
Best move: dxe4