No. People are allowed to use databases in daily. Games in databases often go out that far.
You can't make cheating accusations in the forum.
Use the report button if you want want your opponent checked out.
Does 99.5% accuracy by opponent mean they used engine?
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I got handled, meaning that they did pretty much everything perfectly. I confirmed that after I resigned on roughly move 25, and probably should have on move 20, as the game analysis showed their accuracy at 99.5% - wow.
So, is it likely that they used an engine given that almost perfect play?