◇ Just read — no move neededHow the fortress holds
Cannon plus two advisors holds against a chariot (炮双士例和单车) — the exact mirror of the horse ending, and the reason is the cannon's screen. The cannon never fights: it lives on the advisor-corner file, in front of or behind the king, and while it stays on its file an advisor always stands at its back. The rhythm to remember: when the chariot threatens the king, move the cannon; when it turns on the cannon, move the king — 禁将动炮，禁炮动将. The chariot wins only a defence that moves the wrong piece.