[computer-go] CGOS down

2007-11-08 Thread Jason House
CGOS is currently down.
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Re: [computer-go] [OT] All-integer scalable distribution algorithm.

2007-11-08 Thread steve uurtamo
while neither a normal distribution nor integer
based, the following is relatively fast and may
be useful for you (you might need to slide things
around so that you get the maximum value
where you want it and ignore the rest)

check out the poisson distribution:

http://en.wikipedia.org/wiki/Poisson_distribution

there is helpfully an algorithm from knuth
around the middle of the article that is quick.

i take it that you want to go from a uniform
distribution to something weighted more on one
side than the other, for a finite number of
possible values?  if there's no strong reason
that you want it to be half-normal, then there
are a ton of distributions that can serve that
need and might be easier to deal with in code.

i suggested the poisson because it's something
like the binomial, which itself is quite a bit
like the normal, only very heavily based in
a finite number of trials.  (i'd prefer the
binomial, but that might mean precomputing a lot
of little tables ahead of time).

s.

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Re: [computer-go] use for Monte Carlo on 19X19?

2007-11-08 Thread Gunnar Farnebäck

Stefan Mertin wrote:

on 07.11.2007 07:35 Gunnar Farnebäck wrote:

Stefan Mertin wrote:

I am using GnuGo scoring in my tournaments.
But GnuGo 3.7.10 mostly doesn´t score seki correctly,
has this been revised for v3.7.11 ...?!

What scoring mode are you using?

/Gunnar


SORRY - I was completely wrong here,
I just realize that I was still using GnuGo 3.6
for scoring instead of 3.7.10!

(for chinese :
--score estimate --chinese-rules 
for japanese:

--score estimate)

In my actual computer Go tournament 
I just set up SmartGo2.7 to play GoIntellect10,

and from 150 9x9games there are 7 with a seki in the final position.

5 of these were scored wrongly because I mistakingly had
scored with GnuGo3.6 - I now have changed it to 3.7.11 and
everything seams to be perfect! 


With GNU Go 3.6 you can try --score aftermath instead. It plays out 
the game until all stones except ones in seki are unconditionally 
settled, which usually gives a reliable seki detection. Also with 
current development versions --score aftermath is expected to be the 
most reliable scoring option, but the difference is much smaller nowadays.


/Gunnar
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