He played a 3 move repetition in your game, and the game doesn't look like engine use.
Taking almost exactly 4 second on lots of moves is weird, and a lot of moves in the top 3 engine choice, but still doesn't seem so obvious to me... maybe I'm too trusting in this instance.
Player with nick [no public accusation, please - MOD] from canada hacker guys!!! He using illegal programs for win! Be careful and admins do something pls..........
[See https://support.chess.com/customer/en/portal/articles/1444879-fair-play-on-chess-com-what-you-need-to-know 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 Cheating Forum group. However, accusations are still not allowed there.
- MOD]