Indian Defense Anti Nimzo Indian Discovered Attack in Chess

In the Indian Defense Anti-Nimzo Indian, a “discovered attack” happens when one piece moves away (often after a pawn break or exchange) to reveal a line—typically a rook or bishop—onto a target. The defining feature is that the attacker’s line is blocked until a specific move creates the reveal, turning a quiet position into an immediate tactical threat. For intermediate players, it’s most common around central/queenside pieces where the Anti-Nimzo structure allows a sudden opening of a diagonal or file.