About ELO rating

Yanman.be

Yanman.be

Banned

Join Date: Dec 2005

Belgium

[ROSE]

A/

03 Jul 2006 at 17:38 - 1
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.

cR4zY-n^

Frost Gate Guardian

Join Date: Jul 2005

Zadar - Croatia

We Work As A [Team]

Mo/E

03 Jul 2006 at 18:44 - 2
Rather rely on your skills imo. :P

VGJustice

VGJustice

Desert Nomad

Join Date: Jul 2005

Tyria, cappin' ur bosses

Boston Guild [BG]

R/W

03 Jul 2006 at 18:59 - 3
Quote:
Originally Posted by Barbie
Math is hard.
Quoted for Truth.

Yanman.be

Yanman.be

Banned

Join Date: Dec 2005

Belgium

[ROSE]

A/

03 Jul 2006 at 18:59 - 4
Gives us a morale boost

EDIT what do you mean with that VGJustice?