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BeginnerExercise142

 

Beginner Exercise 142 Attempts
  Difficulty: Beginner   Keywords: Problem

[Diagram]
White to play.

Zephi: This one seems a bit complicated, but I can see at least two possibilities. Focusing on only the two marked stones, white needs B to keep them from escaping, but can't play there without being immediately captured, so I think white would have to first set up a ko at point A. After this, I think that B and C are miai for capturing, though white would need some good ko threats to make B work. Here's how I think both cases would look:


[Diagram]
Black blocks the ko

Black looks pretty dead if he just connects to avoid the ko.


[Diagram]
Black allows the ko

In this case, black takes first in the ko, so white needs to have some really good ko threats to make this work.


[Diagram]
White plays b first.

Again, Black takes first, and white needs a very good ko threat. (W3 seems like it would only cause black to fill in the ko in which case, playing at c is no longer an option for white.)

Well, if this isn't the solution, I hope it's at least on the right track.



This is a copy of the living page "Beginner Exercise 142 Attempts" at Sensei's Library.
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