Chess puzzle (Advantage)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Other_variations
Moves: 1. d4 d5 2. c4 dxc4 3. Nc3 h6 4. e4 a6 5. Bxc4 Bd7 6. Qb3 e6 7. Qxb7 *
Position (FEN): rn1qkbnr/1Qpb1pp1/p3p2p/8/2BPP3/2N5/PP3PPP/R1B1K1NR b KQkq - 0 7
Black to move.
Themes:  Opening  
Puzzle rating: 2283
Best move: Nc6