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EightOnTheSecondLine

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Referenced by
KnowYourLines
KanazawaSolution32
KanazawaSolution42
BeginnerExercise1...
KanazawaSolution36
BeginnerSQuestion...
115WNNotcher
BeginnerExercise6...
BQM56
116NWNotcher
116WWNotcher
116NNNotcher
Aug18Failure
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RTGProblem3Solution

 

Six Die But Eight Live
Path: GoProverbs   · Prev: ThereIsDeathInTheHane   · Next: FourDieButSixLive
Path: LifeAndDeath   · Prev: JosekiRelatedLifeAndDeath   · Next: FourDieButSixLive

  Difficulty: Beginner   Keywords: Life & Death, Proverb

Six stones in a row on the second row die, but eight stones on a row live. Seven stones in a row depends on sente.

This applies to the life of a group which has no eyes and which has a solid row of connected stones on the second line. As long as the group is enclosed, the number of external liberties are irrelevant.

[Diagram]
Eight stones live

Even if Black has sente, White will end up with a straight-four eyespace, which is alive. The two x points are miai.


[Diagram]
Seven stones live with sente

With seven stones and sente, White also ends up with a straight-four eye space, which is alive. The two x points are miai.


[Diagram]
Seven stones die with gote

With seven stones and gote, White ends up with a straight-three big eye. After 5 White is dead.


[Diagram]
Six stones die

With six stones, even with sente, White ends up with a straight-three eye space. After 4 White is dead.

--MortenPahle



But there is a condition for White to live.

[Diagram]
Six stones: the condition

Under the condition that White has stones at a and b, if White plays first, White can live. If Black plays first, White will have a ko to live.


[Diagram]
Black first; White lives with ko

by ChihChan



Path: GoProverbs   · Prev: ThereIsDeathInTheHane   · Next: FourDieButSixLive
Path: LifeAndDeath   · Prev: JosekiRelatedLifeAndDeath   · Next: FourDieButSixLive

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