On Fri, Oct 02, 2009 at 09:52:35PM -0600, Martin Mueller wrote:
> >Yes, Fuego uses just the 3x3 patterns; its strength is surprising. :-)
> >Someone conjenctured it is because of how well-tuned its constants
> >are.
> >I also think large part of it is that it seems to use perfect nakade
> >solver in playouts, so it should be very strong at playout tsumego; at
> >least in my experiments I'm finding that crucial to strength of my
> >bot...
>
> It is true that Fuego has no larger patterns. However, playouts also
> use a number of other rules, e.g. for low liberty and selfatari.
>
> Regarding parameter tuning, I am not so sure. This may have been
> true in the past. However, there have been many changes to Fuego in
> recent months, but the parameters have not been re-tuned, so there
> is probably room for improvement.
>
> Fuego is unfortunately also far from perfect in nakade playouts. It
> only implements a simple but effective rule of moving single stone
> selfataries to the adjacent point. This "solves" most stretched
> nakade shapes. However, "bulky" shapes are misplayed with high
> probability (and some with 100% probability...)
Interesting! I got confused by GoUctUtil::IsMutualAtari, but now I'm not
sure if it is even really used, nor exactly what is it supposed to
actually test in that condition. :-)
Then it turns out that I'm already implementing pretty much all the
tests in Pachi as Fuego is, just probably way too mistuned and buggy,
ah well... ;-) The strange thing is, I don't seem to be getting any
noticeable gain from 2-liberty tactics and checking the pattern at two
last moves instead of just the last one; did you get a big gain from
these?
--
Petr "Pasky" Baudis
A lot of people have my books on their bookshelves.
That's the problem, they need to read them. -- Don Knuth
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