# GokyoShumyoSection3Problem40/Attempts

Black to make ko

LukeNine45: Perhaps this?

xela: No, at 'a' and there is no ko. Unfortunately though I don't know what the correct answer is! I want to play at , but I can't see a followup that works.

LukeNine45: Duh. Good point. I wanted to start that way too, but also didn't see a continuation! hmmm, how about this:

at

xela: I don't think this works either: at ?

LukeNine45: You mean this? Still ko, no?

ko?

xela: Yes, ko.

This way of avoiding it doesn't work.
white is trapped

xela: white can try to break out this way, but I don't think it works.

continuation
Another idea

xela: I think this does the job, but there are quite a few variations...

variation 1: ko

Maybe is wrong: can white live if is at 'a'?

variation 2: another ko

This way is not so good for white, as black gets to take the ko first.

variation 3: white dies

If at , the result is similar to variation 4 below.

variation 4: complicated!

This is the part that I (xela) find difficult. can't escape, but white has a dead shape. (If at 'a' instead, then at .) I'm sure there are a few more variations, so I may have made a mistake.

LukeNine45: at b? hmmm, no then at ...

Variation 5

LukeNine45: I think white lives this way?

xela: If black plays at 'a', then the eye at 'b' can be squeezed shut, same as in variation 4 above?

Variation 5.1
Variation 5.2
Variation 5.3

LukeNine45: hmmm this looks both bad and unavoidable...

xela: ... so now we seem to have two solutions!

modified; 10 at 4, advantage white!

This seems to be forced all the way

GokyoShumyoSection3Problem40/Attempts last edited by 194.120.84.9 on January 11, 2013 - 18:40
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