Seki: Mutual Life
Seki is one of Go's most elegant situations: two enemy groups sit locked together, sharing liberties that neither player can fill without being captured first. The result is a standoff — both groups live on the board, even though neither has two eyes.
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How a seki forms
Seki usually appears in a cramped space where a Black group and a White group are wedged against each other with one or more shared empty points between them. If either player tries to fill a shared liberty to start capturing, they reduce their own group's liberties first and get captured instead.
So both sides simply stop. Neither can attack without losing, and both groups stay alive — a truce enforced by the rules rather than by two eyes.
Why neither side can move
The key is the shared liberties, called dame. Filling one is a move that helps your opponent capture you before you can capture them. Because the first player to break the standoff loses the race, the correct play for both sides is to leave it alone.
How seki is scored
In a seki, the shared empty points usually belong to no one — they count as neutral, not as territory for either player. The stones themselves are alive and are not removed at the end. This is why recognizing seki matters: miscounting a standoff as dead or as territory can swing the whole game.
Frequently asked questions
- Do groups in seki need two eyes?
- No — that is what makes seki special. Both groups live without two eyes because neither player can fill the shared liberties without being captured first. The standoff itself keeps them alive.
- Who gets the points in a seki?
- Usually nobody. The shared empty points between the groups count as neutral rather than as territory for either side, and the living stones stay on the board when the game is scored.
- How do I avoid accidentally breaking a seki?
- Don't fill the shared liberties between the two groups. In a seki, playing into the shared space almost always puts your own group into atari first, handing your opponent the capture.
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