What material is not enough to win in xiangqi?
These answers restate the rules implemented by our open-source engine, which follows the WXF laws and is regression-tested against the official 110-diagram repetition casebook. Where an answer refers to a specific position, that position lives on the linked reference page, where the build verifies it against the engine before publishing.
Direct answer
A lone horse cannot force mate, and neither can a lone cannon — the cannon case being unique to this game, because a cannon needs a screen and a bare general in an empty palace gives it none. A single chariot does force mate, and so do horse-and-cannon, two horses, and either minor piece with a soldier.
What wins against a bare general
- Chariot — forced mate.
- Horse and cannon — wins.
- Two horses — wins.
- Horse and soldier, cannon and soldier — win.
- Cannon and advisor — wins; the advisor is the screen.
- Lone horse, lone cannon — cannot force mate.
The trap this sets
Trading down into cannon-versus-bare-general throws away a win. Before simplifying, check what you will be left with — a cannon without a screen of its own is not winning material, however comfortable the position looks.
Against a defence with advisors and elephants intact the requirements go up considerably: a lone chariot against a full defence is a standard draw.
Related questions
Why can a lone cannon not mate?
It cannot even give check to a general in an empty palace, because there is nothing to jump over.
Does a chariot beat two advisors and two elephants?
Normally no — that is a standard draw. Remove one advisor and it usually wins.
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