The highest I have ever seen is 3008.
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I had 2700 myself. I saw GM Mica around 3200.
The highest rating I have ever seen is 5000
@lefonghua and he is trying to reach 4000
search on twitch
20,000 USD donation if I reach 4000 in tactics
I saw a 3000(?) On superblitz once. They played over 25 games, 2ith some quite high players. I think you can find the highest right now in the rankings which isn't prov. I think Nykerstein is Carlsen. He fluctuates high at the top of the chess "gene" pool.
