Nimzowitsch Defense El Columpio Defense Discovered Check in Chess

The Nimzowitsch Defense El Columpio Defense Discovered Check is a tactical motif where a piece move (often by the defender) opens a line so that a check is delivered “from behind.” In Nimzowitsch Defense structures, the defining feature is that a seemingly quiet move to reposition a piece creates a discovered attack on the enemy king while keeping the opponent’s pieces pinned or awkward.