This implies that the top UCT programs are still over 1000 ELO points from
the top human amateurs.
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Andy
Sent: Thursday, January 31, 2008 9:32 AM
To: computer-go
Subject: [computer-go] Go rating math information
There were some
How do you compute that? I think the ELO values given are the rating
differences that correspond to the particular upset (win) rate. They're not
absolute ELO values. A truly absolute value is also tough to define. CGOS
picked its value somewhat arbitrarily.
On Jan 31, 2008 12:54 PM, David
Don Dailey wrote:
I don't know how David figures 1000 ELO, but I would expect the
difference to be much larger than that for 19x19 go. I don't believe
they are yet very close to 1 Dan.
http://www.gokgs.com/graphPage.jsp?user=CrazyStone
You're right. They're closer to 2 Dan.
:)
--
ELO ratings don't have to be absolute, just self consistent. So if you
beat someone 7.2% of the time, that means you are about 440 ELO
stronger than him.
However, I don't understand what the K-factor has to do with anything.
scaling it up or down doesn't change anything. It's common
Sorry, the KGS formula uses a constant k which is different from the
K-factor in Elo.
P(A wins) = 1 / ( 1 + exp(k*(RankB-RankA)) )
This would be equivalent to changing the constant 400 in:
P(A wins) = 1 / ( 1 + 10^((Ra-Rb)/400)) )
EGF has a similar scheme except of course they use different
Andy wrote:
CrazyStone hasn't played since the initial spike to 1k in December. The
movement of the chart afterwards is rating drift.
Ok. For me this is actually GOOD news :)
--
GCP
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CrazyStone hasn't played since the initial spike to 1k in December. The
movement of the chart afterwards is rating drift.
On Jan 31, 2008 12:49 PM, Gian-Carlo Pascutto [EMAIL PROTECTED] wrote:
Don Dailey wrote:
I don't know how David figures 1000 ELO, but I would expect the
difference to
There seems to be a discrepancy: 11.5% between 2d and 5d in EGF rating system
versus 2.0% between 2d and 5d in KGS rating system.
I think this can be explained by hidden biases in the EGF statistics:
1: To be a 5d in real tournaments in Europe does not mean your rating is
between 2450 and 2550
From: Andy [EMAIL PROTECTED]
Sorry, the KGS formula uses a constant k which is different from the K-factor
in Elo.
P(A wins) = 1 / ( 1 + exp(k*(RankB-RankA)) )
This would be equivalent to changing the constant 400 in:
P(A wins) = 1 / ( 1 + 10^((Ra-Rb)/400)) )
EGF has a similar scheme except
I was shocked for a second, until I check Crazy Stone's playing record. Its
rating shot up after it stopped playing! It hasn't played a single rated
game on KGS since Dec 2, 2007.
On Jan 31, 2008 1:49 PM, Gian-Carlo Pascutto [EMAIL PROTECTED] wrote:
Don Dailey wrote:
I don't know how David
So if I get rated on KGS all I have to do is stop playing and my rank
will shoot up a few ranks?
- Don
Jason House wrote:
I was shocked for a second, until I check Crazy Stone's playing
record. Its rating shot up after it stopped playing! It hasn't
played a single rated game on KGS since
That's a crazy looking graph!It looks like CrazyStone was close to
1d last spring, then a version change (perhaps) dropped it back to 2k.
Then suddenly in Dec (a new version?) it jumped suddenly to 1d then
gradually increased to 1.5d
- Don
Gian-Carlo Pascutto wrote:
Don Dailey
A little more information on what CrazyStone's real performance on KGS has
been like during the time the graph depicts:
http://www.gokgs.com/gameArchives.jsp?user=crazystoneyear=2007month=3
http://www.gokgs.com/gameArchives.jsp?user=crazystoneyear=2007month=4
Yes, the math is attempting to model reality. :)
That's why I also included the EGF data which is based on observed
statistical upset rate. Of course those ratings are calculated using a
formula which pre-supposes an upset rate. Round and round. :)
On Jan 31, 2008 1:26 PM, terry
On Jan 31, 2008 2:20 PM, Don Dailey [EMAIL PROTECTED] wrote:
So if I get rated on KGS all I have to do is stop playing and my rank
will shoot up a few ranks?
It's a pretty common phenomenon on KGS... I've seen it happen many times
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computer-go
The other way around happens too: in 2006 I had a 4 month pause on KGS and my
rank dropped from 4d to 4k.
Van: [EMAIL PROTECTED] namens Jason House
Verzonden: do 31-1-2008 20:33
Aan: computer-go
Onderwerp: Re: [computer-go] Go rating math information
On Jan
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