Ever wondered what’s the highest rating there could possibly be? How far you need to go to get to the top? OGS doesn’t have rating-based leaderboards (right? I’m not missing any obvious feature like an idiot?), maybe to discourage cheating, after all go is all about bettering yourself. However! Since I crawled basically all OGS players, now we can have the answer. Of course, ratings constantly change, but top three accounts are quite different from all others 
Here’s our list:
#521277 with rating of 3166 (~12d)
#448183 with rating of 3303 (~13d)
#496624 with rating of 3586 (~15d)
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Ive always been wondering. Thank you for this 
EDIT: All of these profiles do indeed look rather goofy…
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Amazing how few games they all have!
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I participate in a couple title tournaments, and the highest ranked player I’ve seen is peecatchoo (9d+).
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#2 and #3 were banned for cheating, while #1 looks like a bug. I wonder what the legit 1-2-3 would be. Would probably include vlin and peecatchoo.
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Sadaharu would be up there time to time especially crazy with the amount of games he plays constantly on various boards.
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1577 rating points for just one game, won against weaker opponent! 
Oh dear! I must take back all I was saying about glicko-2 reliability! 
Myea, last time I checked it was 408 concurrent matches. Even if we assume that only 50% of all games require him to play a move on any given day and that only 20% of those games require any serious consideration (his winrate is about 80%), that’s still more than 40 games. If serious consideration comes down to 2 minutes and non-serious consideration works out to 10 seconds, that’s still 2 hours a day spent on 200 different games.