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Graded Go Problems vol 4, problem 243
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Author:  lorill [ Tue Aug 09, 2011 12:33 am ]
Post subject:  Graded Go Problems vol 4, problem 243
Click Here To Show Diagram Code
[go]$$c Black to get a ko
$$ . . . . . . . . . |
$$ . . . . . . X X . |
$$ . . . . . . X O . |
$$ . . . . . . X O . |
$$ . . . . X X O . O |
$$ . . . . X O O . . |
$$ . . . . . X . . . |
$$ ----------------[/go]


Here's the proposed solution :
Click Here To Show Diagram Code
[go]$$c Proposed solution
$$ . . . . . . . . . |
$$ . . . . . . X X . |
$$ . . . . . . X O 4 |
$$ . . . . . . X O . |
$$ . . . . X X O . O |
$$ . . . . X O O 2 5 |
$$ . . . . . X 3 1 6 |
$$ ----------------[/go]

White takes the ko first


Here is my attempt :
Click Here To Show Diagram Code
[go]$$c My attempt
$$ . . . . . . . . . |
$$ . . . . . . X X . |
$$ . . . . . . X O 1 |
$$ . . . . . . X O . |
$$ . . . . X X O . O |
$$ . . . . X O O 2 5 |
$$ . . . . . X . 3 4 |
$$ ----------------[/go]

This also looks like a direct ko (black R1 kills), but black takes first and the situation looks better if he lose the ko.


What am I missing ?
Author:  Sverre [ Tue Aug 09, 2011 1:34 am ]
Post subject:  Re: Graded Go Problems vol 4, problem 243
lorill wrote:
Here is my attempt :
Click Here To Show Diagram Code
[go]$$c My attempt
$$ . . . . . . . . . |
$$ . . . . . . X X . |
$$ . . . . . . X O 1 |
$$ . . . . . . X O . |
$$ . . . . X X O . O |
$$ . . . . X O O 2 5 |
$$ . . . . . X . 3 4 |
$$ ----------------[/go]

This also looks like a direct ko (black R1 kills), but black takes first and the situation looks better if he lose the ko.


What am I missing ?


Click Here To Show Diagram Code
[go]$$c
$$ . . . . . . . . . |
$$ . . . . . . X X 5 |
$$ . . . . . . X O 1 |
$$ . . . . . . X O . |
$$ . . . . X X O . O |
$$ . . . . X O O 2 . |
$$ . . . . . X 4 3 6 |
$$ ----------------[/go]
Author:  lorill [ Tue Aug 09, 2011 1:46 am ]
Post subject:  Re: Graded Go Problems vol 4, problem 243
Sverre wrote:
Click Here To Show Diagram Code
[go]$$c
$$ . . . . . . . . . |
$$ . . . . . . X X 5 |
$$ . . . . . . X O 1 |
$$ . . . . . . X O . |
$$ . . . . X X O . O |
$$ . . . . X O O 2 . |
$$ . . . . . X 4 3 6 |
$$ ----------------[/go]


Oops. Thanks, :w4: didn't occur to me.
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