> Forest of True Sight > Questions & Answers Reload this Page About ELO rating
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Old Jul 03, 2006, 05:38 PM // 17:38   #1
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Default About ELO rating

Guild Wars uses the ELO rating. Fine.


According this article http://gw.gamewikis.org/wiki/Rating , the correct formula to calculate the probability of winning is this one (using brackets ): p = 1/(1+(10((x-y)/400) where X is the enemy, and Y is your rating.

When I use this formula, to calculate the probability to win of a guild of my alliance ( 1111 rating ) and our guild ( 1125 rating ), I get a probability of 1.5384 . As far as I know, probabilities should be between 0 and 1 right? Any numbercruncher wanting to help here?

I'm creating some quick program to calculate our odds in a guild battle, how many points we win/lose etc. But it seems this formula is flawed, or I did something wrong.


EDIT stupid me...the exact formula : p = 1/(1+(10^((x-y)/400)

The probability now is 0.52, wich is normal.

Last edited by Yanman.be; Jul 03, 2006 at 05:52 PM // 17:52..
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Old Jul 03, 2006, 06:44 PM // 18:44   #2
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Rather rely on your skills imo. :P
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Old Jul 03, 2006, 06:59 PM // 18:59   #3
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Quote:
Originally Posted by Barbie
Math is hard.
Quoted for Truth.
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Old Jul 03, 2006, 06:59 PM // 18:59   #4
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Gives us a morale boost

EDIT what do you mean with that VGJustice?

Last edited by Yanman.be; Jul 03, 2006 at 07:04 PM // 19:04..
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