Nimzo Indian Defense Kmoch Variation Discovered Check in Chess

In the Nimzo-Indian Defense Kmoch Variation, a “discovered check” happens when one piece moves away (often after a pawn or piece shift) to reveal a line to the enemy king, while the moving piece itself is not the direct checking piece. The defining feature is a tactical alignment on a diagonal or file created by the Kmoch setup, where a discovered attack on the king appears suddenly after a specific intermediate move.