cheating.
https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com
If you ever suspect a player, report it.
https://support.chess.com/article/209-how-do-i-report-someone
https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com
If you ever suspect a player, report it.
https://support.chess.com/article/209-how-do-i-report-someone