Upgrade to Chess.com Premium!

Logic Behind Glicko Rating System ...


  • 3 years ago · Quote · #1

    Kikyo_Sushi

    Can Some One Plz explain why there is/need to be such a Vast Difference in our Initial  Increament/Decreament in Rating Points ( after our Initial 1200 Rating ) as compared with the later ones after we hv played a certain number of games ?

    ( hundreds of points ,initially compared with 1-30 or so points ,later )

    I hv read abt the Rating Deviation Factor( RD ),etc ( Glicko Rating System Article ) but I don't quite get the Co-relation between them.

    I've seen some people Win juz a few games consecutively,after their initial 1200 Score ,then their Rating will shoot up to maybe 2000 or so and those that keep loosing will end up with maybe < 1000  ..

    and then their Rating will stay around there if they don't play a lot of games after that or if they only play with Opponents of almost similiar Ratings .

    Will there be any lasting effect on his Rating if the Player is actually a  Not So Good Player but he happened to play  against a few High Rated Players who weren't playing well at that time n' he Won or Vice Versa ?

    Juz Wondering ,

    Tnx.

  • 3 years ago · Quote · #2

    ironic_begar

    When you first start playing the rating system has no information on how good you are (reflected by a high RD). It adjusts you rating by large ammounts to account for that lack of knowledge. If you're a master, it wants to get your rating up to where it should be quickly. Once it gets enough information about how good you are (reflected by a lower RD), it slows down how fast your rating is changing, so it remains reasonably stable.

    Now, if you get a high rating, and don't play a lot of games after that, your RD will go back up. Then when you start playing again, it will change rapidly again.

    The rating doesn't really have a good "memory." If you get lucky against a few high rated players, eventually the effect of that will go away.

  • 3 years ago · Quote · #3

    Kikyo_Sushi

    So the Aim of the Initial large Rating Adjustment is to get a Good or Master Player's Rating up as fast as possible n' similarly,a Poor Player's  or Beginner's Rating down asap too .

    Yeah,if a Player gets lucky or unlucky against a few High or Low Rated Players,s/he will hv to play lots more games to annul the effect.

    Will there be any long -term effect if s/he limits her/his Opponent's to within a Certain Rating Category ? .. I guess not,coz they wld all hv their own RD's too.

    Tnx ironic_begar !

  • 2 years ago · Quote · #4

    silverhawkz

    It is the rule to follow!

  • 2 years ago · Quote · #5

    Daws74

    @Shadowknight: That scenario shouldn't happen with the Glicko system.  The RD should go up if a player is inactive and then the rating adjustment will be more rapid.

  • 8 months ago · Quote · #6

    Sred

    UrzaPW wrote:
    Daws74 wrote:

    @Shadowknight: That scenario shouldn't happen with the Glicko system.  The RD should go up if a player is inactive and then the rating adjustment will be more rapid.

    Inactive....what does exactly inactive means?

    Imagine I am not playing any online game and my glicko is 30. In a month, without playing at all, I take a look and it is 60 (those are not correct values, maybe in a month it increases more or less, don't know)

    Now, imagine I am not playing any online game and my glicko is 30, but I do start an online game. We play slowly, and within a month, we haven't finished it yet. Is it my glicko 60 even though I have been playing for a month (but since we haven't finished yet and hence the glicko goes up), or in that time the ongoing game made glicko stop?

    The more general question would be:

    Does the glicko rating change while you have online ongoing games if it takes long to finish them (and act as inactivity)??

    99% sure that concerning Glicko RD changes it doesn't matter if you play online games without finishing them or if you don't play at all.

  • 8 months ago · Quote · #7

    Daws74

    Further reading for those that want to understand the details:

    http://www.chess.com/article/view/chess-ratings---how-they-work

    There are even more detailed links in that article.


Back to Top

Post your reply: