Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 Nf6 2. c4 d5 3. Nc3 Bf5 4. e3 e6 5. Nf3 Be7 6. cxd5 Nxd5 7. Bd2 Bg6 8.
Bc4 O-O 9. O-O c5 10. Qb3 Nb4 11. Ne5 *
Position (FEN): rn1q1rk1/pp2bppp/4p1b1/2p1N3/1nBP4/1QN1P3/PP1B1PPP/R4RK1 b - - 3 11
Black to move.
Themes:  Middlegame  
Puzzle rating: 1666
Best move: Bc2