Janice Kims Life And Death Study

   

Part of: Kirk/WhatILearnedAtJaniceKimsWorkshop

Basic Position

[Diagram]

corner

This is a shape that comes up quite often in real games. Can black kill the white corner?

See J-group

[Diagram]

corner

It seems so. After B1, W2 is normal, but the placement at B3 creates the possibility of a snapback at B7. White is dead here.

[Diagram]

corner

If white pulls back, instead, he still cannot manage two eyes.


With the hane

[Diagram]

corner

What if white also has the marked stone? Now can black kill?

[Diagram]

corner

The tactic from before no longer work. Black can try to play the same move (to create the same dead shape), but white has a recourse with W2.

[Diagram]

corner

If black tries the placement directly, white also lives. It seems there is no way to kill the white group when it the hane is in place.


With a turn

[Diagram]

corner

How about when white has turned, but black has the hane?

[Diagram]

corner

It seems black can kill white in this situation. If white jumps back instead and plays at B3, black simply pushes at W2.


With a turn, but a solid connection on top

[Diagram]

corner

Notice that in this position, with the solid connection instead of the marked point, white can live.

[Diagram]

corner

If black tries to reduce the space white can block. Black's cut doesn't work.

[Diagram]

corner

Neither does this placement.

[Diagram]

corner

Black has to throw in after white captures, so white has time to make the second eye.


The point of it all

[Diagram]

corner

Consider a joseki like this 3-3 invasion after a pincer on the keima approach move to the 4-4 point.

[Diagram]

corner

How do you choose between the squared points?

[Diagram]

corner

If white expects to move with W16 and W18, he better play W14 and not the marked point. White's corner is alive so he can continue on the outside.


This is a copy of the living page "Janice Kims Life And Death Study" at Sensei's Library.
(OC) 2016 the Authors, published under the OpenContent License V1.0.
[Welcome to Sensei's Library!]
StartingPoints
ReferenceSection
About