Chess puzzle (Crushing)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Stonewall_Attack
Moves: 1. d4 d5 2. e3 Nf6 3. Bd3 Bg4 4. Nd2 *
Position (FEN): rn1qkb1r/ppp1pppp/5n2/3p4/3P2b1/3BP3/PPPN1PPP/R1BQK1NR b KQkq - 4 4
Black to move.
Themes:  Opening  
Puzzle rating: 908
Best move: Bxd1