[computer-go] contact moves

[Arend Bayer <arend.bayer@xxxxxx>]

On Mon, 6 Dec 2004, Stuart Yeates wrote:

> Ray Tayek wrote:
> > At 11:48 PM 12/5/04, you wrote:
> > 
> > > At 11:42 4-12-2004 -0800, Ray Tayek wrote:
> > surely the programs know about the symmetries of the square. playing in the
> > middle is perhaps what is confusing them. iirc, my teacher (mr. yang) has
> > observed that the programs do not do well if you make unusual attaching
> > (contact) moves.
> 
> It's much more likely that the cause of the effect is that playing a stange
> move in the opening greatly reduces opening book techniques.

I think it is a deeper problem. It is really hard to evaluate the
effects of e.g. a hane correctly. Or assume you have a board that is
empty apart from this position in the center:

..a...
..XO..
.X.XO.	O to move
..XO..
......

It is pretty hard to tell a program how urgent a move in this area
(taking the ko, or playing at a) is.

Arend





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