Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 Nf6 2. c4 d5 3. Nc3 dxc4 4. e3 e6 5. Bxc4 b6 6. Nf3 Bb7 7. O-O Bb4 *
Position (FEN): rn1qk2r/pbp2ppp/1p2pn2/8/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w kq - 4 8
White to move.
Themes:  Opening  
Puzzle rating: 1074
Best move: Qa4+