What is 臥槽馬, a classic named horse-mate pattern?
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
臥槽馬 is one of the traditional named mating patterns preserved in xiangqi's endgame literature, where a horse lands on a point beside the enemy palace and delivers a check the general has no square to escape from. A horse's check cannot be interposed along a line; it is blocked only by putting a piece on the horse's leg, and in this pattern no defender can reach that point.
Why it works mechanically
A horse's check cannot be blocked the way a chariot's or cannon's can, since there is no line between the horse and its target to interpose on. The only defences are capturing the horse, capturing or blocking its leg, or moving the general, and next to the palace corner the general is often already out of safe squares to move to.
Why it is still worth recognising by name
Seeing the pattern once makes it far easier to spot the same shape again later, which is the entire point of studying named patterns rather than only solving fresh puzzles. It also commonly appears as the finishing move of a longer combination rather than as a standalone tactic, so recognising it helps you calculate toward it as a target.
Related questions
Does the horse need support to deliver this mate?
Usually yes, since the general's escort pieces would otherwise simply capture the horse; a supporting piece or the mate's forcing nature has to remove that option first.
Is this pattern common in actual games?
The underlying idea, a horse delivering a check beside the palace that nothing can block, recurs often enough that it is one of the first named patterns most players learn.
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