RE: computer-go: unmake move?

["Mark Boon" <tesuji@xxxxxxxxx>]

Cleaning up old mail as well :-)

It's probably a matter of terminology, but in the case described it seemed a
rather essential point. A loose ladder or a geta plays at a point that
doesn't fill a liberty, so it's equivalent to having an extra liberty.
Therefore those cases should be considered to be a 3 liberty search.

    Mark

> -----Original Message-----
> From: owner-computer-go@xxxxxxxxxxxxxxxxx
> [mailto:owner-computer-go@xxxxxxxxxxxxxxxxx]On Behalf Of David Fotland
> Sent: Monday, February 26, 2001 1:52 AM
> To: Mark Boon; computer-go@xxxxxxxxxxxxxxxxx
> Subject: Re: computer-go: unmake move?
>
>
>
> Just cleaning up some very old e-mail :)
>
> The attacker can also make a geta or loose ladder. Sometimes the
> ladder depends on a ko, and my main move generator understands ko.
>
>
> At 08:51 AM 6/17/2000 +0000, Mark Boon wrote:
>
>
> > > But I removed the 2 liberty attack generator a few years ago, since
> > > it wasn't finding some of the moves that the general generator could
> > > find.
> >
> >I don't understand this. How can it not find some moves? All the attacker
> >can do is fill one of the liberties and all that the escaper can do is
> >either play at the remaining liberty or capture an adjacent
> chain. Any other
> >move cannot be for 2 liberty search and should be 3 or more
> liberty search.
> >
> >
> >
> >     Mark
>
> David Fotland
>
>