[Welcome to Sensei's Library!]

StartingPoints
ReferenceSection
About


Referenced by
NonLocality

 

Non-locality solution
    Keywords: EndGame, Problem

All right, I'll make an attempt.

[Diagram]
Jigo

The simple answer produces jigo, which isn't good enough.


[Diagram]
4 fills ko

White loses, obviously.


[Diagram]
still doesn't work.

Now if White wins the ko, Black takes W1 and we get the same jigo result as before. If White connects, Black takes the ko and White is without a sufficient ko threat.



Deebster: If White connects the ko, then Black at a, White block at b, and Black filling at W1, doesn't that leave the score at White +1 (with one prisoner each)?

Evand: No, the score is jigo -- Black has two prisoners, one from the ko and one from capturing W1; White has one prisoner from the ko.

[Diagram]
W7 at B2

This looks like the winning move. Black is without a ko threat, and so White wins by 1 point. Cute problem.



-- Evand



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