Chess puzzle (Advantage)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Kennedy_Variation
Moves: 1. e4 e5 2. d4 d6 3. dxe5 Nc6 4. exd6 Bxd6 5. Nf3 Qe7 6. Nc3 Be6 7. Bd3 O-O-O
8. O-O Bg4 9. Qe2 Ne5 10. Nd5 Qd7 11. Qe3 *
Position (FEN): 2kr2nr/pppq1ppp/3b4/3Nn3/4P1b1/3BQN2/PPP2PPP/R1B2RK1 b - - 13 11
Black to move.
Themes:  Opening  
Puzzle rating: 2112
Best move: Bxf3