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Referenced by
BasicLiveShapes
TwoEyes
WikimastereditOfN...

 

smallest group with two eyes
Path: LifeAndDeath   · Prev: KillingShapes   · Next: BasicLivingEyeShapes
    Keywords: Life & Death

1. In the corner

In the corner, 6 stones are the minimum to completely shape up a group with two eyes.

First shape

[Diagram]
Diag.: Small life in the corner



Second shape

[Diagram]
Diag.: Small life in the corner

a and b are miai and make for the sixth stone.

Third shape

[Diagram]
Diag.: Small life in the corner

Here's another invincible pair.



Fourth shape

[Diagram]
Diag.: Small life in the corner

Here's another invincible pair.



2. On the side

On the side, the smallest groups with two eyes require 8 stones.

First shape

[Diagram]
Diag.: The smallest unit along a side



Second shape

[Diagram]
Diag.: Another live group of 8 along the side


3. In the center

In the center, 10 stones are required to make the smallest group with two eyes.

[Diagram]
Diag.: Small unit in the center

Of the two circled stones, one can be replaced by the circled point. Likewise, one of the two squared stones can be replaced by a stone at a.



[Diagram]
Diag.: Smaller unit in the center

Isn't this 8 stone shape alive ?

a and b, c and d are miai

Jasonred : Well, yeah, but it's not actually TWO EYES ... YET!!! This page has examples where you can ignore the group til doomsday and they're unkillable, cause they already have two eyes unconditionally alive etc etc.

On making ALIVE groups, I heard that you only need like 2 stones in the corner or something... I dunno about that one!



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Path: LifeAndDeath   · Prev: KillingShapes   · Next: BasicLivingEyeShapes
This is a copy of the living page "smallest group with two eyes" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.