I report like 80% who beat me as cheaters literally.
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When you analysis your game, if they made every single move perfect ... they are cheating
Nov 12, 2019
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#3
Chess.com moderator @CrystalMoon posted the following in a similar forum that has since been locked:
"Please do not discuss cheating in the forums.
Instead join the Cheating Forum Club: https://www.chess.com/club/cheating-forum
If you feel someone is cheating, report him: https://support.chess.com/customer/portal/emails/new
All allegations will be investigated,"
Generally speaking though, it takes a trained eye (almost always a strong chess player too) to spot potential cheaters. Certain moves just look "computer-ish" while other good moves follow a logic that looks more human. If your rating is 1200-ish, then I highly doubt that 80% of your opponents are cheating. Just play your best and if chess.com catches any real cheating cases, then you will be refunded the rating points. Probably 1% of your opponents is a more realistic cheating percentage: no where near 80% 
Knowledgequest120 wrote:
how would i know if someone cheated me?
80% only, Meh!
Why not 100%?
You have unlimited report tickets!!
how would i know if someone cheated me?