Bishops Opening Philidor Counterattack Discovered Attack in Chess

In the bishops opening Philidor counterattack, Black often challenges the center with ...c5 and develops pieces to pressure White’s dark squares. A “discovered attack” happens when a move (commonly a pawn break or piece shift) opens a line so one bishop/rook suddenly attacks a more valuable target behind it. In this motif, the defining feature is the line-opening move that reveals an attack on a piece or king while the attacker was previously blocked.