When playing rated online correspondence chess, it's quite possible that the players' ratings change during the game. When the game is over, which rating will be used for rating adjustments? The ratings they had before the game began, or the rating at the end of the game?

  • 1
    Do you mean ICCF games?
    – JiK
    Sep 2, 2015 at 12:53
  • Not necessarily, I meant any kind of (online) correspondence chess.
    – lindelof
    Sep 2, 2015 at 13:24

2 Answers 2


Every site that I have seen uses the rating at the end of the game.

  • But GameKnot doesn't: it uses either the rating at start of the game or the rating at the end of the game, whichever is higher.
    – Stephen
    Sep 3, 2015 at 7:32

Online sites use the rating at the beginning of the game. You can tell that because that's the rating they display even if it's changed.

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