Kyu Exercise 13 / Solution

Sub-page of KyuExercise13

Prelude

[Diagram]

Order matters.

The order of the throw-ins W1 and W3 is very important. If Black captures with B4, White descends with W5.

[Diagram]

Connect-and-die.

Black has three points to connect: B6, a, b. But the black+circle chain has only two liberties.

[Diagram]

Snapback.

If B2 connects, W3 captures the chain in a snapback.

But this is not yet the solution.



Solution

[Diagram]

Solution.

Now, presenting the actual solution.

[Diagram]

Strongest resistance.

The strongest resistance by Black is B4, and is the only way to salvage the situation. This is the solution, which is a direct ko. If Black wins this ko, he simply captures at a, and the white chain on the left is captured cleanly.

[Diagram]

Local ko threat

There is a local ko threat at W1.



Failure

[Diagram]

Failure.

The hane at W1 is a failure. As W5 is a necessary approach move, Black connects at B6 just in time, so there is no connect-and-die.

[Diagram]

Failure.

If W1 in the solution diagram makes a throw-in on the left side first, then B2 can connect. The result is the same as the previous failure diagram.



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(OC) 2014 the Authors, published under the OpenContent License V1.0.
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