Trapped pieces
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Direct answer
A trapped piece is one with no safe square to go to: you take it at your leisure, and it cannot be rescued. Trapping matters more in xiangqi than in western chess because so much of this board restricts movement — a horse can be blocked by a single piece on its leg, a cannon without a screen threatens nothing, and elephants, advisors and soldiers can never come back across the lines that limit them.
A note on the name
Unlike the fork (捉双) or the pin (牵制), this one has no standard Chinese pattern name that we can point to. The relevant word is 困 (kùn) — a piece is 困 when it has no viable move, or when every move loses it — but that describes a condition rather than a named tactic. We would rather say so than invent a term that no source uses.
The idea itself is entirely standard; it simply travels under the general heading of winning material.
Why xiangqi traps pieces so easily
Four features of the board do the work, and each one is a piece type that can be shut down:
- Horses are blocked by one piece. A horse steps through an orthogonal point, and anything standing there — including a piece of its own side — removes that move. A horse with several legs blocked has very few squares, and a horse deep in enemy territory often has none. How blocking works →
- Cannons need a screen. A cannon on an empty board captures nothing. As pieces come off, cannons quietly lose their power, and a cannon can be neutralised without being attacked at all.
- Elephants and advisors can never leave. Advisors are confined to the palace and elephants to seven fixed points on their own side. Neither can run, and neither can be defended from far away.
- Soldiers never retreat. A soldier that has crossed the river cannot come home. Push it onto a square the opponent controls and it is simply lost.
Using it, and avoiding it
The practical method is to count a piece’s squares before you attack it, not after. Attacking a piece that has four safe squares is a waste of a move; attacking one that has none wins it. Against a horse, the cheapest reduction is usually not a threat at all but a piece placed on its leg.
In your own position the warning sign is a piece whose square count is falling. A horse that has gone from eight moves to two is a horse to rescue now, while it still has somewhere to go. Common mistakes →
Related questions
What does it mean for a piece to be trapped in xiangqi?
It has no square it can move to without being captured, so it is effectively already lost. The opponent can take it whenever convenient.
Is there a Chinese term for trapping a piece?
Not as a named tactic. 困 describes the condition — a piece with no viable move — but unlike 捉双 for the fork, there is no standard pattern name, and we would rather say that than coin one.
Which xiangqi piece is easiest to trap?
The horse, because a single piece on the point it steps through removes a move, and a horse can be reduced to no squares at all without ever being attacked directly.
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