Re: Advice on evaluation

[David Fotland <fotland@xxxxxxxxxxxxxxx>]

No, most group strength evaluations can't be decided by
reading.  Take a look at a typical early middle game position
from your own games.  There are lots of stable groups that
don't have two eyes yet.  But if the opponent is a little
thicker, then you want to add a stone.  Evaluating this
relative thickness is very difficult.

When there is a fight that can be decided by some tesuji, of 
course you can try to read the result.  But you want the
group strength evaluator to first tell you that here is
a fight.  You don't want to waste time reading when your
stones are already dead.

David

At 04:43 PM 5/17/99 +0200, Joan Pons Semelis wrote:
>I think the problem of group strength should revert to the
>same treatement as ladders: PN, at least a kind of fuzzy one.
>In the most simple way, with a2 liberties chain we check if
>it can get 3 or more if it's friendly move or atari ( or geta )
>if it's enemy; if it has only one (snap-back aside) we only
>check to gain liberties. 
>With group strength the evaluation to decide if it's instable
>it's more complicated than "1 or 2 liberties", the moves to
>try to find out the result more and more difficult to find
>(a tesuji library would help) but ought to be basically the
>same.
>
>Joan
>
>