Choose the weak wing
The general hides behind advisors and elephants — but they cannot hold both gates at once. Attack the side the defence has abandoned (弱侧/将门): the file where no advisor waits. A chariot landing there checks, and the king must run. Here Black's only advisor guards one wing — and your horse on g7 quietly covers the landing square on the other. Find the gate that swings open, and deliver the check.
Solve the challenge to finish this lesson.