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PR and ELO on Grid Gammon

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08-21-2015 , 10:29 AM

Fllecha

journeyman

Join Date: Mar 2010 Posts: 321

I was wondering what correlation exist between average (and weighted) performance rating and elo rating on GridGammon.

I think about this extimation: (In every range the higher PR is for the one who has less elo obv)

< 1500 PR >15

1500-1600 PR 11-15

1600-1700 PR 9-11

1700-1800 PR 6-9

1800-1900 PR 3-6

1900-2000 PR <2

Do you basically agree?

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08-21-2015 , 12:56 PM

Robertie

old hand

Join Date: May 2004 Posts: 1,954

A solution to this was posted on BGOnline recently. I can't vouch for the accuracy, but the result seems reasonable:

GGR = 2065 - 40*PR

(I rounded the numbers off a bit to make the formula easier to remember, and because three decimal places of accuracy aren't really possible in a formula like this.)

So a player with a PR of 3 would be expected to achieve a GridGammon rating of about 1945.

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08-21-2015 , 01:10 PM

_Z_

adept

Join Date: Jul 2004 Posts: 720

I'm consistently above 1900 and I can say with certainty my error rate is >3. I would have thought a 3.0 error rate would be somewhat higher than 1945, but it does seems in the ballpark.

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08-21-2015 , 01:20 PM

Fllecha

journeyman

Join Date: Mar 2010 Posts: 321

Thank you Bill!

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08-22-2015 , 06:34 PM

networth

veteran

Join Date: Dec 2002 Posts: 2,208

Quote:

Originally Posted by _Z_

I can say with certainty my error rate is >3.

Slouch

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08-22-2015 , 07:44 PM

_Z_

adept

Join Date: Jul 2004 Posts: 720

How much higher than 3 I am is a closely guarded secret.

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