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Chess rating system


  • 3 years ago · Quote · #1081

    Rafchess

    InnocentIts somr thing !! let me take little respite. then resume.

  • 3 years ago · Quote · #1082

    andreic

    To follow the basic idea of my system a positive score of 1.25 means the winner, takes 1.25 points per move on average from opponent.Remember that the mate 

    move "captures" all opponent pieces.

  • 3 years ago · Quote · #1083

    tubebender

    Don`t try to" reinvent the Wheel"; stay with either the Elo (for simplicity) or the Glickman modified Elo system used by the USCF.

  • 3 years ago · Quote · #1084

    Rafchess

    Innocenttubebender wrote:

    Don`t try to" reinvent the Wheel"; stay with either the Elo (for simplicity) or the Glickman modified Elo system used by the USCF.


     Innocent more bending will spoil the tube.so appriciate ur understanding!

  • 3 years ago · Quote · #1085

    cathen

    Merry Christmas everyone!

  • 3 years ago · Quote · #1086

    GPGP

    thanks, same to you and everyone

  • 3 years ago · Quote · #1087

    Rafchess

    Thnx ! same  to  everybody.Laughing

  • 3 years ago · Quote · #1088

    chestonblumentahl

    anyone else get a little turned on by the bishop?

  • 3 years ago · Quote · #1089

    Rafchess

    chestonblumentahl wrote:

    anyone else get a little turned on by the bishop?


     Frown...unpredictable !!

  • 3 years ago · Quote · #1090

    Rafchess

    andreic wrote:

    I have an idea about how to rate players during a RR tournament., and a general extension in mind.

    I believe a measure of the player strength relative to a certain game is given by the speed of the material gain. At the begining the material is even, and at the end  there are two posibilities:

    1. The game is a draw(any chess rule leading to a draw) .  

    No one loses both sides keeps its armies for a feature battle. In this case the game score is given by

    (material1 - material2)/(number_of_game_moves). One of the sides will have a positive score , while the other will have the same absolute score but with the sign changed.

    2. The game ends in mate. The side which loses the game is considered to lose all  the material in the end, as the soldiers cannot fight without their king.

    The score will be for the winner: 

    1.material_of_the_winner_at_last_move/number_of_game_moves

    And for the loser will be 

     (- material_of_the_winner_at_last_move)/number_of_game_moves.

    At a RR tournament is sufficient to add the score for every game for every player just like that.

    If a player competes in different tournaments we must take into account the adversary strength, and the player ranking  is computed different.

    The player strength is the average  of the cumulated game scores.

    Suppose the players strengths are s1 and s2,number of games played so far are n1 and n2, and player 1 has a positive game result: r( a draw does not need to be a zero result).

    Then compute

                        s1 =  (s1*n1+(s2/(s1+s2))*r)/(n1+1);

                        n1=n1+1;

                        s2=(s2*n2-(s2/(s1+s2))*r)/(n2+1);

                        n2=n2+1; 

    A simple numerical example s1=0.5 s2=0.26  n1=10 ; n2=25; r=1.25

     New stregths:

      s1= (0.5*10 + (0.26/0.76)*1.25)/11 = 0.49

      s2= (0.26*25 - (0.26/0.76)*1.25)/26 =0.23

    Also the probability the player 1 wins the player 2 is computed like (s1/s1+s2).

    Before the game p=65%; after the game p=68%.

    The interpretation of score 1.25:

    If the number of moves in current game was 30 , it means the winner had 30*1.25 in material at the last move.

    I will apreciate some feedback and how can we test this. 

     

    Andrei from Romania


     Laughing appriciate ur Romanian formulae!! Wish u good luck % Happy New Year!

  • 3 years ago · Quote · #1091

    andreic

    Thanks.  A good year for every one.

  • 3 years ago · Quote · #1092

    Rafchess

    andreic wrote:

    Thanks.  A good year for every one.


     Smilewish the same to u & all in Chess.com !!

  • 3 years ago · Quote · #1093

    icebergslimshadow

    [COMMENT DELETED]
  • 3 years ago · Quote · #1094

    beardogjones

    "points" is an artificial concept - why not just throw in the towel and

    have Houdini assign the ratings or play both sides for that matter?

  • 3 years ago · Quote · #1095

    Rafchess

    beardogjones wrote:

    "points" is an artificial concept - why not just throw in the towel and

    have Houdini assign the ratings or play both sides for that matter?


     Innocent that could be an wonderful innovation to ur artificial concept!! of points.happy new year beardogjones.

  • 3 years ago · Quote · #1096

    Burginflickle

    [COMMENT DELETED]
  • 3 years ago · Quote · #1097

    Rafchess

    Burginflickle wrote:
    [COMMENT DELETED]

     Innocent 0+0=0.

  • 3 years ago · Quote · #1098

    nitish63

    dare 2 challnge me!!!

  • 3 years ago · Quote · #1099

    Rafchess

    nitish63 wrote:

    dare 2 challnge me!!!


    hi nitish@63! U thrown ur gauntlet to everybody.Its heroic! appriciate!!!!!!

  • 3 years ago · Quote · #1100

    nameno1had

    My major issue with online ratings is there is no way to tell if the person who beat you used a chess engine. The minor ones are things like, why should a club player with an official rating from an offical sanctioning body of chess tournaments have to start at 1200 when he is a legit 1750? I am sure the argument will be that if he/she is truly that good, they will get there eventually. True, they will, but why take a student in 9th grade back in 4th? Just because 4th grade in the average grade of school students? That is plain ignorant. These few things really bother me. It makes it truly difficult to assess ones personal development. Chessmaster starts players at 1400. Maybe it is because of these complaints. I say start everyone high. If they aren't legit, they will fall fast.


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