[Computer-go] Orego 7.08 released

[David Fotland]

Many Faces does something similar, but I also include all the responses to
bad moves, so when the opponent makes a bad move the program knows how to
punish it.  I include all moves from every joseki book published in English
through about 2003.  I added a few joseki from a 5 volume Japanese joseki
dictionary too.

I also found that it makes no real difference to strength against computers,
but helps a little against people, and makes the games much more peasant to
watch.

Part of my goal is to make a program that people can learn from, so this is
another reason for it to know and play joseki.

David


> -----Original Message-----
> From: computer-go-bounces at dvandva.org [mailto:computer-go-
> bounces at dvandva.org] On Behalf Of Petr Baudis
> Sent: Tuesday, January 11, 2011 9:23 AM
> To: computer-go at dvandva.org
> Subject: Re: [Computer-go] Orego 7.08 released
> 
> On Tue, Jan 11, 2011 at 08:45:31AM -0800, terry mcintyre wrote:
> > Drake, has your research proved the proverb "Learn Joseki, Lose Three
> Ranks"?
> >
> > I have a theory, based on my own experience with joseki. Knowing the
> right move
> > is not enough; one must know what to do with the wrong moves also.
> Joseki often
> > skate at the edge between "good for black" and "good for white", and
> they also
> > tend to be strongly influenced by conditions such as ladders.
> 
> In Pachi, I'm using joseki sequences that were automatically extracted
> from Kogo branches marked as "GOOD VARIATION". The overall efect against
> other programs has been mostly neutral, possibly a decrease by very few
> elo points.  However, my subjective impression has been that the program
> has more success against humans with joseki enabled, and doubtlessly its
> play is much more pleasant to watch and play against, so I think it is
> worth the tradeoff.
> 
> Note that I am not using joseki unconditionally, just as another
> heuristic among all the others. So if Pachi does not like the joseki,
> it is free to play elsewhere. Sometimes yes, it gets into a sequence that
> it ultimately misplays, but it seems not to be the majority of cases.
> 
> So, probably a very boring "neutral" rating at least from me. :-)
> 
> --
> 				Petr "Pasky" Baudis
> Computer science education cannot make an expert programmer any more
> than studying brushes and pigment can make an expert painter. --esr
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