Queens Pawn Game Colle System Discovered Attack Beginner Chess Puzzles

In the Queens Pawn Game Colle System, White usually builds with d4, Nf3, e3, Bd3, and c3, then aims for the e4 break. A discovered attack in this setup happens when one piece moves and opens a line for another piece, often the bishop on d3 or the queen on d1 to attack along the center or kingside.