◇ Just read — no move neededHow the fortress holds
Cannon plus two advisors holds against a chariot (炮双士例和单车). The cannon sits on the advisor-corner file, in front of or behind the king, keeping the whole file shielded. The rhythm to remember: when the chariot ties down the king, move the cannon; when it ties down the cannon, move the king — 禁将动炮，禁炮动将.