Beginner Exercise 190 / Solution

Sub-page of BeginnerExercise190
[Diagram]

White kills marked black stones

The BC stones are not invincible because of the WS white stone.

After W5, black can't the marked stones from being retaken at W1.

If B1, then a play at the circled point catches a connect-and-die.

unkx80: Good!


[Diagram]

How to answer B2?

unkx80: To make the discussion more complete, consider how to answer B2?

[Diagram]

smaller capture

W3 at B4 would save the WC stones in the original problem by capturing the BC stornes and sacrificing WS.

However, the shown variation could work (?) if there's no ladder-breaker waiting in that direction.



Niklaus: There is no need to worry about ladder breakers:

[Diagram]

Shorter ladder

[Diagram]

Not a ladder

unkx80: Niklaus is right. Further, the sequence shown is not a ladder at all. This can be seen after B8, which captures the W1 stone and makes an atari on the W5 stone.



This is a copy of the living page "Beginner Exercise 190 / Solution" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
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