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Is this move legal?
Posted: Tue May 28, 2013 11:15 am
by Xaos
$$B Corner
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$$ | T X X . . . . . .
$$ | X O . . . . . . .
$$ | O . . . . . . . .
$$ | . . . , . . . . .
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$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B Corner
$$ ------------------
$$ | T X X . . . . . .
$$ | X O . . . . . . .
$$ | O . . . . . . . .
$$ | . . . , . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
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$$ | . . . . . . . . .[/go]
Can white place on the triangle and capture one black stone even though the other two blacks have liberties? I assume it can because the capture leaves a liberty for the white stone making the capture. Ko prevents black from capturing right away, and white can then fill it.
Re: Is this move legal?
Posted: Tue May 28, 2013 11:19 am
by Unusedname
Xaos wrote:Can white place on the triangle and capture one black stone even though the other two blacks have liberties? I assume it can because the capture leaves a liberty for the white stone making the capture. Ko prevents black from capturing right away, and white can then fill it.
You are correct in your reasoning.
Yes white may place on the triangle and capture one black stone.
And yes the Ko prevents black from capturing right away.
Re: Is this move legal?
Posted: Tue May 28, 2013 5:15 pm
by TheBigH
The only circumstance under which white could not capture the black stone is if...
$$B ...the black stone
has just captured a white one
in the corner...
$$ ------------------
$$ | T X X . . . . . .
$$ | 1 O . . . . . . .
$$ | O . . . . . . . .
$$ | . . . , . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
- Click Here To Show Diagram Code
[go]$$B ...the black stone has just captured a white one in the corner...
$$ ------------------
$$ | T X X . . . . . .
$$ | 1 O . . . . . . .
$$ | O . . . . . . . .
$$ | . . . , . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .
$$ | . . . . . . . . .[/go]
...in which case White can't immediately recapture because of ko.