What is the technique for chariot versus cannon in a simplified endgame?
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 chariot against a bare cannon is generally winning for the chariot, but the technique requires respecting the cannon's ability to check from a distance: avoid placing your own general or key pieces on a line where the cannon already has a screen in place, since that turns a losing piece into a genuinely annoying one.
Why the cannon is not harmless even though it is losing
A cannon with a ready screen can check from far away, and repeated checks can disrupt the winning side's coordination if the general wanders onto an exposed line carelessly. The danger is inconvenience and lost tempo, not a realistic path to a draw, provided the stronger side stays alert.
The winning approach
Use the chariot to restrict the cannon's mobility and remove its available screens, rather than trying to attack the cannon directly, which it can often evade along open lines. Once the cannon is boxed into a passive role with no useful screen available, bring your general forward safely and finish with standard mating technique.
Related questions
Is this matchup harder to convert than chariot versus horse?
Broadly similar in difficulty, though the specific danger differs: a horse threatens forks, a cannon threatens checks from range.
What if the cannon has a soldier to use as a screen?
That makes the position more resilient for the defender and requires extra care, though the chariot side should still be winning with accurate play.
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