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Fujitsu8Game9

 

Fujitsu 8 Game 9 Solution
    Keywords: EndGame, Problem

After White fills the dame (marked):

[Diagram]
Reinforcement is needed

Black has to play at 1 to prevent seki. Black can only avoid seki by ignoring a ko threat, which costs too much to be acceptable.


[Diagram]
If Black does not reinforce

Black can't afford to play the ko at a, and has to settle for a seki at b.



This is a copy of the living page "Fujitsu 8 Game 9 Solution" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.