Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Accelerated_London_System
Moves: 1. d4 d5 2. Bf4 Nf6 3. Be3 Nc6 4. c4 e6 5. c5 b6 6. cxb6 axb6 7. Nf3 Bb4+ 8.
Nc3 Ne4 9. Bd2 Nxd2 10. Qxd2 Na5 11. e3 *
Position (FEN): r1bqk2r/2p2ppp/1p2p3/n2p4/1b1P4/2N1PN2/PP1Q1PPP/R3KB1R b KQkq - 0 11
Black to move.
Themes:  Opening  
Puzzle rating: 1645
Best move: Nb3