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ELO Rating System for TWD

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  • ELO Rating System for TWD

    Originally posted by Overstrand
    I worked on this for a bit with Myth and this is what we have:

    This is mainly Myth's work (obviously) Thanks Myth

    Squads start off with 1000 rating points.
    When a TWD game has been played, the new rating of the squad will be determined by the following formula:

    New Rating = Old Rating + K(W-P)

    P = Probablitity of winning
    K = Maximum rating change
    W = 1 if the squad has won, W = 0 if the squad has lost

    P = 1 / (1 + 10^(-difference_in_ratings / 400))
    K = 50

    wolvencreed (rating 1000) vs Pallies (rating 1400)

    first we'll calculate the probability of winning of wolvencreed over Pallies:
    difference_in_ratings = 1000-1400 = -400

    P = 1 / (1+10^(-(-400) / 400))
    P = 1 / (1+10^1)
    P = 1 / 11
    P = 0.09 = 9% chance of wolvencreed winning over Pallies.
    then ofcourse, the chance of Pallies winning over wolvencreed is 1-0.09 = 0.91 = 91%

    - Scenario: wolvencreed wins!
    so, for wolvencreed: W = 1
    new rating = old rating + K * (W-P)
    new rating = 1000 + 50 * (1-0.09)
    new rating = 1000 + 45.5 = 1046

    for Pallies: W = 0
    new rating = 1400 + 50 * (0-0.91) = 1400 + (-45.5) = 1354.5 = 1355


    K (maximum rating change) is set to 50 in this example. We're considering to lower K when a squad plays more games.
    This is info concerning calculating the rating points for TWD. The quote was taken from an ancient post by Overstrand, and Guano thought it would be a good idea to sticky this, because enough people question about it every so often. So instead of staffers giving you a half-assed answer about it all, you can check it out here, if you didn't already know how the rating system works.

    This is also a great way to maximize the points your squad can earn, whilst comparing the amount of points that can be lost to any given squad.
    Failure teaches success.

  • #2
    you used the word ass ! omg omg

    great idea btw, very nice !

    good work again
    1:Pred_FNM <ER>> guys, yellow + green is really shitty for forumcolours :p
    1:lnx> what's wrong with that combination
    1:lnx> I wear yellow-green clothes :(
    1:Pred_FNM <ER>> i dont mean in clothes, in forums..
    1:lnx> kk
    1:lnx> buy a black-white computer monitor if you don't like the colors foo


    • #3
      Tu me pisse * la raie!


      • #4
        Wax that post by Overstrand was made in 2002. The system has not changed since.
        Failure teaches success.


        • #5
          ...electric light orchestra?
          Originally posted by Ward
          OK.. ur retarded case closed


          • #6
            lol wax, way to go bro
            Originally posted by Kolar
            My reaction:

            ;1;Holy Shit
            ;1;Al Qaeda took care of method for us


            • #7
              cool system. Thanks for posting the 'source'.
              audit> and btw, im your fan!

              DeeZ NuTs> time to own
              DeeZ NuTs> got my fedex hat on
              Azreal> LOloL
              cook> ROFL

              R.I.P VENOM


              • #8
                Too difficult .. can't understand it
                If it's about food, pm me in the game.
                7:Barton> hi tats
                7:Barton> still no smod?
                7:Barton> :(
                7:Tatsumaru uk> heh no
                7:Barton> guess u need to do more ass kissing

                3:Harder> we could be like tom cruise in top gun with team speak
                3:Harder> "MAVRIC I GOTTA BIRD ON MY BACK!!"



                • #9
                  great dig, Kim!
                  S18 TWLB Champ
                  S19 TWLB Runner-Up
                  S20 TWLD/TWLJ/TWLB Champ
                  S21 TWLB Runner-Up
                  S8/S9/S10 TWDT-D/TWDT-J/TWDT-B Champ
                  S11 TWDT-B Runner-Up
                  S12 TWDT-B Champ
                  S13 TWDT-B Runner-Up
                  S14 TWDT-B Champ
                  S16 TWDT-B Runner-Up


                  • #10
                    Rigor> mastersword im thinking u, me and a bottle of crisco baby
                    Mastersword> ROFL
                    Mastersword> really?

                    (TWDBot)>Your squad rating has just changed from 813 to 813, after losing the Javelin match vs dicE. You are #34 in TWJD - For detailed info go to

                    #21 - Don't forget


                    • #11
                      TWD Calculator - Website

                      hey hey ....

                      Last season I wrote a php-script to calculate the matches
                      (for those who can't calculated that by hand :P or head )

                      With the start of the new TWD-WebSite and TWSD I fixed some stuff
                      and added a SD-Calculator.

                      For now it's just a nice tool to play with for you,
                      but if ya battle for points close to the start of next TWL it might become useful ... :whistling:

                      here's the Link, notify me if it doesnt work ....TWD - Calculators

                      I fixed the missing Squads, if ya still find bugs mail me ....

                      Last edited by HildoZ; 07-13-2005, 03:01 PM.

                      1:Apocalypse WOW!> i don't know, the immaturity level in this game really grates on me
                      1:HildoZ> rephrase this easier plz ...
                      1:Apocalypse WOW!> the dumb little kids really annoy me


                      • #12
                        Greetings Hildoz

                        i cant find my squadron on the dd list

                        3 Value 1419

                        it would be nice if u fix that bug!

                        thank you.
                        SSCU Trench Wars Local BanG Operator
                        SSCU Trenchwars SModerator
                        Trench Wars Extreme League Head Operator
                        Trench Wars Divisions Operator

                        1:Rudy> We don't let Barton out much
                        1:Rudy> He has a habit of touching things he's not supposed to
                        1:Rudy> Like fire, and boobies


                        • #13
                          some squads are missing


                          • #14
                            that's a neat calculator. when i saw this thread in new posts i was going to ask if there was a calculator. gj!
                            thread killer
                            :oldsmile: :confused: :bigups: