Chess puzzle (Advantage)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Central_Variation
Moves: 1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. e5 Nd5 5. Bxc4 Bf5 6. a3 e6 7. Nc3 a6 8. Nf3
Be7 9. Qb3 Nxc3 10. bxc3 b5 11. Bxb5+ *
Position (FEN): rn1qk2r/2p1bppp/p3p3/1B2Pb2/3P4/PQP2N2/5PPP/R1B1K2R b KQkq - 0 11
Black to move.
Themes:  Middlegame  
Puzzle rating: 1663
Best move: axb5