cheating

Engine use is not allowed in any rated games on chess.com and only in unrated games if both players are aware of what is going on.
Discussions of cheating, potential cheating or cheat detection are not allowed on the general forums. If you would like to have that discussion, join the following group.
https://www.chess.com/club/cheating-forum
Chess.com takes cheating very seriously:
https://www.chess.com/article/view/chess-com-fair-play-and-cheat-detection
https://support.chess.com/customer/en/portal/articles/1444879-fair-play-on-chess-com-what-you-need-to-know