RE: computer-go: Perl Module for next move.

["Fant, Chris" <chris.fant@xxxxxxxxxx>]

No single unowned region is larger that two spaces, therefore X is allowed
to pass.  The rule has not been violated.


-----Original Message-----
From: Daniel Bump [mailto:bump@xxxxxxxxxxxxxxxxx]
Sent: Friday, June 08, 2001 2:31 PM
To: computer-go@xxxxxxxxxxxxxxxxx
Subject: Re: computer-go: Perl Module for next move.



Allan Crossman wrote:

> >Probably best to scrap the automatic-loss rule and turn in into a
> >pass-not-allowed rule.
> >
> >Pass not allowed when:
> >   Any region owned by you is bigger than 1 space
> >   Any unowned region is bigger than 2 spaces
> 
> Hmm, aren't there curious seki positions where there's more than a 2 space
> area but playing in it would be suicidal? I'm sure I've seen one...

Consider the following position:

.OOOOOOO..
.OXXXXXOO.
.OX.OOXXO.
.OX.OO.XO.
.OXXXXXXO.
.OOOOOOOO.

This is a seki, and O can safely fill one mutual point. But
if X fills any of the these 3 mutual points then O can kill.

If X has sente, he cannot safely comply with this `rule.'

Daniel Bump