Hier einige Feststellungen zum Elo-Rating:
Elo ratings are a comparative only, and are valid only within the rating pool in which they were calculated, rather than being an absolute measure of a player's strength.
Elo did not specify exactly how close two performances ought to be to result in a draw as opposed to a win or loss. Actually, there is a probability of a draw that is dependent on the performance differential, so this latter is more of a confidence interval than any deterministic frontier.
The Elo ratings of these various organizations are not always directly comparable, since Elo ratings measure the results within a closed pool of players rather than absolute skill.
Quelle:
https://en.wikipedia.org/wiki/Elo_rating_system?wprov=sfti1
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