Kadas Opening Discovered Check in Chess

The Kadas Opening Discovered Check is a tactical motif where a piece move in the Kadas Opening opens a line for another piece to give check—often after a pawn or piece shift that “unblocks” the attacker. The defining feature is that the check is delivered by a line-piece (commonly a bishop or rook) that was previously blocked, while the move that creates the opening also improves the attacker’s tempo.