Should I trade cannons in the opening?
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
Only if you have a specific reason to. A cannon needs other pieces on the board to act as screens, so it is at its most dangerous early, while the board is full. Trading it off in the opening releases tension and generally suits whichever player wanted the calmer position, which is not always you.
What you give up
An early cannon trade removes one of the two pieces most opening plans are built around. If your plan depended on a central cannon's pressure, trading it for the opponent's is agreeing to abandon that plan in exchange for theirs.
When it is right
If the trade wins a tempo, damages the opponent's structure, or you are already comfortable and would rather simplify, it can be a good decision. The test is the same as any trade: name what you are getting for it, beyond "it felt natural".
Related questions
Does trading cannons favour the defender?
Generally, since it removes an attacking piece from a sharp position before the attack has developed.
Is keeping both cannons always better?
Not always, but it is the default. Deviate for a reason, not out of habit.
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