If you feel like another member might be using disallowed resources you should report them and let staff decide.
https://support.chess.com/en/articles/8562517-how-do-i-report-someone
Public discussions of cheating, potential cheating, cheat detection is not allowed in the general forums.
[removed -- MS]
This might be legit my first time reporting anyone for cheating. Haven't reported him yet, but what do you guys think? Look, I didn't play good at all, but that's cause he was 700, and I was playing while talking with friends and not paying much attention. But lichess says this dude has 17 avg centipawn loss in an semi-open(?) position like that one. That's crazy. I was also expecting this dude to blunder since he's 700 but nope... He's also my friend irl, but dude has already been flexing this win like crazy. He's also admitted this is not his main, but he has cheated on one of his alts. Wondering what you guys think? Is this just me?