Life and Death in Go
Almost every Go game is decided by life and death: whether a group of stones can make two eyes and live, or gets sealed in and captured. Reading these situations out — move by move, in your head — is the single most valuable skill a Go player can build.
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Two eyes mean life
A group is alive when it surrounds two separate empty points, called eyes. To capture it, your opponent would have to fill both eyes at once — but filling the last liberty of either eye is self-capture and illegal. So a group with two real eyes can never be taken off the board.
A group with one eye, or with a single larger space the opponent can reduce to one eye, is dead: it will eventually run out of liberties.
The vital point
Many groups have a single key point that decides everything. If you play there first, the surrounded group is split into two eyes and lives; if your opponent plays there first, the same space becomes one big false eye and dies. Finding that vital point is the heart of most life-and-death problems.
Tsumego: life-and-death problems
Tsumego are set positions where you must find the move that kills a group or the move that saves it. Solving them daily is how nearly every strong player trained their reading. Even a few minutes a day builds the habit of counting liberties and seeing eye shapes before you commit a stone.
Frequently asked questions
- Why do you need two eyes to live in Go?
- With two separate eyes, your opponent can never fill the last liberty of your group — doing so would require an illegal self-capturing move. One eye is not enough, because that single space can eventually be filled.
- What is a false eye?
- A false eye looks like an eye but its diagonal points are controlled by the opponent, so the surrounding stones can be captured and the eye collapses. Only real eyes, safely connected, keep a group alive.
- What are tsumego?
- Tsumego are life-and-death puzzles: a fixed position where you find the single move that kills or saves a group. They are the classic way Go players train reading, and our daily puzzle is a gentle place to start.
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