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Jfc001

 

Solution To Jfc 001
    Keywords: Ko

[Diagram]
Diag.: Black dies

Unfortunately it looks like that, without reinforcement, White can get Black's eye down to the bulky five shape. So Black is dead if White goes first.



[Diagram]
Diag.: Black gets a ko.

Black has four internal ko threats (a, b, c and d) here, while White has none at the moment. So she will not try to kill by this method immediately, if this is the only way. White will play very insolently in other parts of the board, accumulate some ko-threats, and then will return here.

 -- HolIgor

[Diagram]
Diag.: More ko threats?

I think Black has even more internal ko threats (starting at a) by playing the ko immediately as in this diagram. On the other hand, playing the sagari immediately will avoid giving White two moves somewhere, so Black might want to play defensively immediately after all. -- Andre Engels



Also note that if White had connected below 5 with 7, she would have allowed Black to live by playing 7.

[Diagram]
Diag.: Black dies

[Diagram]
Diag.: Black dies

With White 8 at 4, Black is gone.


[Diagram]
Diag.: Black lives

Here, Black definitely lives. --FCS Black 3 is not needed? Too small?



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