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Why do average player ratings spike every 100 points?

Eg for blitz ratings this week there are 10850 with 1875, 11963 with 1900, 10150 with 1925. Normally I would expect the value for 1900 to be somewhere between between the value for 1875 and 1925. Could it result from people playing to targets? Eg "I'm not logging off until my rating hits 1900 points". But we're looking at a difference of around 10%. That seems unlikely to explain it.

lichess.org/stat/rating/distribution/blitz
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@IenpwIII said in #1:
> Eg for blitz ratings this week there are 10850 with 1875, 11963 with 1900, 10150 with 1925. Normally I would expect the value for 1900 to be somewhere between between the value for 1875 and 1925. Could it result from people playing to targets? Eg "I'm not logging off until my rating hits 1900 points". But we're looking at a difference of around 10%. That seems unlikely to explain it.
>
> lichess.org/stat/rating/distribution/blitz
Yeah I say Im pretty bad...
It comes down with barriers of knowledge. Say for instance you knew nothing about skewers. But then you mastered the ability to set it up and exploit it, therefore, helping you win.

Each topic you master, or at least using it properly, its worth about 100 points. So if you get to a rating ceiling of say 1700, but you learned something new and get better, in a couple of days, that knowledge reflects into points. so 1800~ will be your new ceiling. Rinse and repeat.

Of course, you could have gotten to your ceiling at 1670 or 1850, but each barrier you pass is around that amount of points.
I'm sorry but that doesn't make any sense. If it were just a few, it could, but there's no reason why barriers of knowledge would be distributed at *every single* 100 points mark.
OP, are you by any chance a visitor of the Chess subreddit? That exact same observation was also on today's frontpage. :) Most likely it's because many folks aspire to have nice, even numbers as their ratings and stop playing once they've crossed a certain threshold.
@ASmallObstacle said in #8:
> OP, are you by any chance a visitor of the Chess subreddit? That exact same observation was also on today's frontpage. :) Most likely it's because many folks aspire to have nice, even numbers as their ratings and stop playing once they've crossed a certain threshold.

I am not... my post is older though :p looks like I've been plagiarised

In any event this is definitely the most plausible explanation to me but it's kind of unsatisfying!
It's a psychological thing. People push for the next 100 and when they cross it, they sit on it for a while. Either they don't play or they play on the other site.

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