Kyu Exercise 7 / Solution

Sub-page of KyuExercise7
[Diagram]

Time is of the essence

The marked black stones have only two turns of aji left in them - the first move is nearly certain to be ate.


[Diagram]

Solution

Now Black better has enough ko threats, or White will finish off on a - this is a two stage ko. b is a ko threat, but obviously smaller than the ko (deiri counting). If Black uses b, White may choose to let Black escape his group, roughly half of the total value.


[Diagram]

White fails

White answers wrong after B1. Now B3 catches the white group in a snapback.


Failing attempts by Black:

[Diagram]

Variation A fails

White can also answer B3 with W4 at a.


[Diagram]

Variation B fails


[Diagram]

Variation C fails

Same result as variation A.



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