Beginner Exercise 107 / Solution

Sub-page of BeginnerExercise107

Solution

[Diagram]

Ko

After W1, B2 can make ko. W3 threatens a snapback as in the previous Exercise. Usually this is the best way for White.

[Diagram]

Alternative ko

W3 here is usually inferior because it adds a point of territory to Black if he wins the ko. On the other hand, the move has the advantage of not reducing liberties of the eyeless White wall.

[Diagram]

White resolves the ko

In this case, White resolves the ko in an unusual way with W7. Now if Black takes the ko, White captures the black+circle stones. It would be a mistake for White to fill the ko, because that just leads to another ko.


Failure

[Diagram]

Black lives

If W1 here, then B2 lives as per rectangular six. Now a and b are miai for life.



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