Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Exchange_Variation
Moves: 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. Bd3 Nc6 6. c3 Nge7 7. O-O Bg4 8.
Nbd2 Qd7 9. Re1 O-O-O 10. b4 Rde8 11. Qa4 Kb8 12. b5 Nd8 13. Nb3 *
Position (FEN): 1k1nr2r/pppqnppp/3b4/1P1p4/Q2P2b1/1NPB1N2/P4PPP/R1B1R1K1 b - - 2 13
Black to move.
Themes:  Opening  
Puzzle rating: 1344
Best move: Bxf3