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  1. 21 Dec '04 23:29
    I am 1586 and I am about to beat a 1820 opponent (OK, sorry about that 😀) How do I calculate my rating change?
  2. Standard member Ragnorak
    For RHP addons...
    21 Dec '04 23:38
    Originally posted by Alopinto
    I am 1586 and I am about to beat a 1820 opponent (OK, sorry about that 😀) How do I calculate my rating change?
    You apply the values to this formula...

    New Rating = Old Rating + K * (Score - Win Expectancy)

    K is a constant (32 for 0-2099, 24 for 2100-2399, 16 for 2400 and above)

    Score is 1 for a win, 0.5 for a draw and 0 for a loss.

    The Win Expectancy is calculated using the following formula :

    Win Expectancy = 1 / (10^((OpponentRating-YourRating)/400)+1)

    Or you just read the next line...

    1611. I have an excel spreadsheet to do it, but I know somebody wrote an online tool to work it out.

    D
  3. Standard member Saint Nick
    Pimp of the elves
    22 Dec '04 00:17
    There are quite a few free rating calculators available on the web. You can google "chess rating calculator" and pull on up.
  4. Standard member thire
    Xebite
    22 Dec '04 07:33
    Originally posted by Phlabibit
    Gregoftheweb made this nifty rating calculator:

    http://www7.brinkster.com/obyrne/rhp_rc.htm

    It will even tell you your percentage chance to win a game, based on ratings.

    Add to favorites!

    P-
    yep! do that! 🙂
    th
  5. Standard member Saint Nick
    Pimp of the elves
    22 Dec '04 15:47
    Did Plab get modded here???

    Don't think I've seen that before...🙄
  6. Standard member thire
    Xebite
    22 Dec '04 22:15
    Originally posted by Saint Nick
    Did Plab get modded here???

    Don't think I've seen that before...🙄
    No, I copied it from another thread! 🙂
    Well spotted! 😀
    th