The horse fork
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Direct answer
A horse fork attacks two enemy pieces at once, so one of them must fall. It is the most common winning tactic in xiangqi because the horse's L-shaped move naturally hits two points no single piece can defend together. The defence is usually to block the horse's leg rather than to move either piece.
The pattern
Red to play. There is one move that attacks both black chariots at once. Find it — a wrong move will be explained rather than rejected.
Red to play. Fork both chariots with the horse.
Xiangqi position. Red: horse d3, general e0. Black: general e9, chariot c6, chariot g6. Red to move.
Recognising it in a real game
Two habits find nearly every horse fork there is:
- Look at your opponent's undefended pieces in pairs. If any two of them sit an L-and-a-bit apart, there may be a point that hits both. This is worth doing every move — it takes seconds.
- Count from the target backwards. Rather than looking at where your horse can go, look at where a horse would have to stand to hit both pieces, then ask whether you can get there.
Forks involving the general are the strongest of all, because the check must be answered — which means the second piece is simply lost.
Defending against one
Three defences, roughly in order of preference:
- Block the horse's leg. Uniquely xiangqi: put a piece on the point the horse steps through and the fork disappears without moving either target. How blocking works →
- Defend one and move the other, if the horse can then be met with an equal trade.
- Counter-attack. A check or a threat of your own can be faster than the fork.
Related questions
What is a fork in xiangqi?
A single move that attacks two or more enemy pieces at once, so that at least one of them cannot be saved. Horses fork most often, but chariots, cannons and even soldiers can do it.
How do you stop a horse fork?
The xiangqi-specific answer is to block the horse's leg — put a piece on the orthogonal point it steps through, and the move becomes illegal. Otherwise defend one piece and move the other, or counter-attack.
Why are horse forks so common in xiangqi?
The board is large and open, generals are confined to the palace, and there is no piece that defends broadly the way a chess queen does. Loose pieces are therefore common, and loose pieces are what forks feed on.