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Aliases (info)
Eyes

Paths
LifeAndDeath
EyesCollection
BigQuestionMark
Shape

Referenced by
Miai
TwoEyes
EyeShape
Extension
FalseEye
Nakade
ThrowIn
TheSecondBookOfGo
ShutIn
AtariGoAsATeachin...
DiagonalPlayRefer...
StupidMoves
BigEyesCanBeSmall...
EyePotential
GroupTax
StraightFour
BeginnerExercise5...
QARTS
ApproachingALifeA...
CompromisedDiagonal

 

Eye
Path: EyesCollection   · Prev:   · Next: TwoEyes
  Difficulty: Beginner   Keywords: Life & Death, Go term

Eyes are a central concept in Go, since two eyes guarantee the life of a group and one eye can mean a great advantage in a capturing race.

In general, what Go players call an eye is an empty space surrounded by stones of one colour, the simplest forms of which are the single point eyes.

[Diagram]
Single point eyes

Here are single point eyes in the centre (unmarked), at the side (marked BC) and in the corner (marked BS).

However, larger surrounded spaces can also be called eyes. For these we refer to eyespace, eyes collection and life and death.

For a more thorough explanation of single point eyes, we refer to recognizing an eye. Also, beware of a false eye that may look like an eye.


There is much discussion on the definition of what is an eye and what is not. The discussions of technical algorithmic definitions is meant mainly for mathematicians and computer programmers, for whom absolute precision is needed.



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This is a copy of the living page "Eye" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.