Chess puzzle (Advantage)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Old_Variation
Moves: 1. d4 d5 2. c4 dxc4 3. e3 b5 4. a4 Ba6 5. axb5 Bxb5 6. Na3 c6 7. Qf3 e6 *
Position (FEN): rn1qkbnr/p4ppp/2p1p3/1b6/2pP4/N3PQ2/1P3PPP/R1B1KBNR w KQkq - 0 8
White to move.
Themes:  Middlegame  
Puzzle rating: 1254
Best move: Nxb5