[Computer-go] September KGS bot tournament: 19x19, slow

David Fotland fotland at smart-games.com
Mon Sep 2 12:15:59 PDT 2013

It's not easy to code an engine that scales well to a cluster.  In 2008 I
ahd access to 1024 cores, but the cluster code I wrote at the time only
scaled to 32 cores (4 machines, 8 cores each).  That code no longer exists,
and I have access to a single 16-core machine, so I can't currently run on
clusters.  With limited development time, I'd rather work on making the core
algorithm stronger, than writing cluster code. 

I think it would interesting to have a slow tournament with a fixed maximum
number of cores (4 or 8, since they are readily available).


> -----Original Message-----
> From: computer-go-bounces at dvandva.org [mailto:computer-go-
> bounces at dvandva.org] On Behalf Of Detlef Schmicker
> Sent: Sunday, September 01, 2013 1:44 PM
> To: nick at maproom.co.uk; computer-go at dvandva.org
> Subject: Re: [Computer-go] September KGS bot tournament: 19x19, slow
> Thanks Nick,
> I love the slow bot tournaments.
> Two reasons:
> 1) For me computer go is a hobby and to hire 6 cluster instances on EC2
> is about 150$ for a tournament. 3 tournaments one i7-4770k:)
> 2) Not all programs can handle clusters. It is an additional problem for
> authors, which are trying to get into this business. And I can tell you,
> it is difficult enough to get into it:)
> If you look at the last slow bot tournaments only few programs (gomorra,
> orego and zen) used clusters, maybe partly because of this reasons.
> Detlef
> Am Sonntag, den 01.09.2013, 20:00 +0100 schrieb Nick Wedd:
> > The September KGS bot tournament will start at 22:00 UTC on Sunday
> > September 8th, and end by 22:00 UTC on Tuesday August 10th.
> >
> > It will have 6 rounds, Swiss, with 19x19 boards.  The time limits will
> > be three hours each, sudden death. The komi will be 7.5. There are
> > details at http://www.gokgs.com/tournInfo.jsp?id=835 .
> >
> > Please register by emailing me, with the words "KGS Tournament
> > Registration" in the email title, at maproom at gmail.com .
> >
> > This may be the last "slow" tournament, with time limits of over an
> > hour each, that I run. Now that cloud computing is easily available, I
> > believe that there is little purpose in setting such slow time limits.
> > If you want to see how a bot does given a lot of thinking time, it
> > makes more sense to hire multiple processors than to let it run for a
> > long time. (If you think I am wrong, you can probably convince me of
> > it.)
> >
> > Nick
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