2021 Rating and rank adjustments

[shinuito]

First I appreciate the effort to try and summarize the ideas nicely

@n0w3l

Now, since there are different board sizes and time settings, each player actually have 9 OGS numbers instead of just one (a number per each board size and time setting) so when you win/lose a 9x9 blitz game only one of the numbers goes up/down. When you win/lose a 19x19 correspondence game another number goes up/down and so on.

One can make an overall number by taking the average of these 9 numbers (maybe weighted by the number of games in each type?)

From what I’ve read and understand, there’s no reason to expect the overall to be the average (in any sense) of the other ratings. They’re all separately calculated.

Also there’s more than just one number changing each game. If you play a blitz 9x9 game, your overall, blitz, 9x9, 9x9 blitz should all change with that game (if I understand correctly).

I tried to come with an analogy with a much simpler rating system than ELO or Glicko but still trying to capture some of the points you highlighted

@n0w3l

Reasonably:
If you win against a stronger player, your number goes up
If you win against a weaker player, your number goes up but not so much
If you lose against a weaker player, your number goes down
If you lose against a stronger player, your number goes down but not so much

the analogy being here for example Overall rank calculation - #10 by shinuito

Again feel free to pick apart that analogy. I don’t expect it to be perfect, I just wanted to imagine a system whereby your ranks vary and the overall isn’t necessarily an average of the others. Also that one could have your overall rank higher than any of the others (as can happen both in that example and on OGS with glicko - what kind of average does that!)