Queens Gambit Declined Orthodox Defense Discovered Check in Chess

In the Queens Gambit Declined Orthodox Defense, the “Discovered Check” motif happens when a move by one piece opens a line to the enemy king, revealing check from another piece. A defining feature is that White’s or Black’s piece move (often involving a pawn break or piece repositioning) uncovers an attack along a file, rank, or diagonal—typically targeting the king on the c8–d7–e8 area or the central dark/light squares. The check is “discovered” because the checking piece was blocked until the intervening piece moved.