Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Accelerated_London_System
Moves: 1. d4 d5 2. Bf4 Nc6 3. Nc3 Bf5 4. Nb5 e5 5. dxe5 a6 6. Nc3 Bb4 7. Qd2 *
Position (FEN): r2qk1nr/1pp2ppp/p1n5/3pPb2/1b3B2/2N5/PPPQPPPP/R3KBNR b KQkq - 3 7
Black to move.
Themes:  Opening  
Puzzle rating: 1489
Best move: d4