Red exploits the vertical alignment of both Cannons, turning Black's defending Rook into an involuntary firing mount to launch a devastating discovered check.
This endgame showcases supreme cannon coordination, where Black's sole defender—the Rook—is ironically weaponized against its own King as a cannon screen. By moving the forward Cannon with a discovered check from the rear Cannon, Red unleashes an unstoppable multi-threat sequence that dismantles Black's palace. Black's critical vulnerability lies in the pinned Rook directly obstructing the King's escape file. The vital tactical lesson is the mastery of the discovered attack ('cannon battery' dynamic), proving that defensive pieces can be turned into fatal liabilities when caught in the opponent's crosshairs.