Why doesn't xiangqi notation use coordinates like chess?
These answers restate the rules implemented by our open-source engine, which follows the WXF laws for movement, checkmate and both repetition rulings: a side that forces a repetition by perpetual check or perpetual chase loses rather than drawing. The chase half has not been validated against the official casebook. Where an answer refers to a specific position, that position lives on the linked reference page, where the build verifies it before publishing.
Direct answer
Because the traditional system is descriptive rather than coordinate-based — it says what the piece does, not which point it lands on in absolute terms. Coordinate schemes for xiangqi do exist and are used internally by software, but the notation people read and write describes the move from the mover's perspective.
The advantage of describing
It matches how a player thinks and speaks. "Cannon to the middle" is a plan; "cannon to e3" is a coordinate. Descriptive notation also survives the board being rotated, which matters when two players sit on opposite sides and each reads from their own right.
The disadvantage
The same physical file has two numbers, and a move means different things depending on who played it. Chess abandoned descriptive notation for exactly this reason. Xiangqi kept it, so a reader has to track whose move it is — which is why Red and Black conventionally use different numerals.
Related questions
Do engines use coordinates?
Internally yes, usually a simple 9×10 index or a UCI-style coordinate string. The display layer converts.
Is descriptive notation harder to learn?
Slightly, because of the two-perspective file numbering. Everything else is simpler than algebraic.
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