Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Cambridge_Springs_Defense
Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Bd3 dxc4 8.
Bxc4 Ne4 9. Qa4 *
Position (FEN): r1b1kb1r/pp1n1ppp/2p1p3/q5B1/Q1BPn3/2N1PN2/PP3PPP/R3K2R b KQkq - 2 9
Black to move.
Themes:  Middlegame  
Puzzle rating: 1717
Best move: Qxa4