Caro Kann Defense Karpov Variation Discovered Attack in Chess

In the Caro-Kann Defense, Karpov Variation, a discovered attack happens when one piece moves out of the way to reveal an attack from a rook, bishop, or queen behind it. The defining feature is often a pinned or aligned piece on the c-file, d-file, or long diagonal, where a single tempo can open a direct threat on the king or a loose piece.