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korean academy volume 3, #231

Posted: Tue Nov 05, 2013 2:10 am
by nickxyzt
In the following position, I couldn't find a way for Black to live. Please advice.
Click Here To Show Diagram Code
[go]$$c Black to live.
$$ ---------------------------------------
$$ | . O . . . . . . . . . . . . . . . . . |
$$ | O X O . . . . . . . . . . . . . . . . |
$$ | . X O . O . . . . . . . . . . . . . . |
$$ | . . X O . . . . . , . . . . . , . . . |
$$ | . . X O . . . . . . . . . . . . . . . |
$$ | X . X O . . . . . . . . . . . . . . . |
$$ | . X O O . . . . . . . . . . . . . . . |
$$ | . O . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]
One possible sequence is:
Click Here To Show Diagram Code
[go]$$c Black to live.
$$ ---------------------------------------
$$ | 7 O . . . . . . . . . . . . . . . . . |
$$ | O X O . . . . . . . . . . . . . . . . |
$$ | 4 X O . O . . . . . . . . . . . . . . |
$$ | 2 3 X O . . . . . , . . . . . , . . . |
$$ | 5 1 X O . . . . . . . . . . . . . . . |
$$ | X . X O . . . . . . . . . . . . . . . |
$$ | 8 X O O . . . . . . . . . . . . . . . |
$$ | 6 O . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]
Still, Black dies... What am I missing here?

Re: korean academy volume 3, #231

Posted: Tue Nov 05, 2013 9:23 am
by Shaddy
I think the problem is wrong, but you can get ko with 5 at 6.

Re: korean academy volume 3, #231

Posted: Tue Nov 05, 2013 9:43 am
by leichtloeslich
Shaddy wrote:you can get ko with 5 at 6.
4 at 6 is a clean kill.

Re: korean academy volume 3, #231

Posted: Tue Nov 05, 2013 9:57 am
by Shaddy
3 at 6, then

Re: korean academy volume 3, #231

Posted: Tue Nov 05, 2013 10:59 am
by Bill Spight
My guess is that something like this was the intended problem. :)
Click Here To Show Diagram Code
[go]$$c Black to live.
$$ ---------------------------------------
$$ | . O . . . . . . . . . . . . . . . . . |
$$ | O X O . . . . . . . . . . . . . . . . |
$$ | . X O . O . . . . . . . . . . . . . . |
$$ | . . X O . . . . . , . . . . . , . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | X . X O . . . . . . . . . . . . . . . |
$$ | . X O O . . . . . . . . . . . . . . . |
$$ | . O . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]