Beginner Exercise 135 / Solution

Sub-page of BeginnerExercise135

Failure

[Diagram]

Failure.

The descent at B1 fails, because after W2, if black tries to atari at a, white b will capture all the black stones.



Opportunity

[Diagram]

Opportunity.

Recognizing that the way to deal with this situation is to create a ko.

Note that W2 cannot avoid the ko by playing at W3. However, white takes the ko first at a.



Solution

[Diagram]

Solution.

At the same time, playing that ko differently can make it more or less advantageous for the player.

The solution is to throw-in at B1 first, followed by B3.

[Diagram]

Solution.

This time round, B5 takes the ko first.



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