when you suspect cheating or find confirmation (by the opponent), merely capture a screenshot of his admission, save it along with the url in notepad or word, then click Help & Support at the bottom of the page, then click on "Contact Support" and tell them what you found. mention you will send a screenshot in the message.
when you get the automated response with a ticket number, merely click reply - leave the subject line alone - and paste the screenshot into the email response.
Staff will examine things and validate your claim.
regards,
moderator
I have found a cheater. His nickname is [EDITED BY A MODERATOR: site policy prohibits naming someone until it is proven by management. they will test his moves and confirm or refute your allegation.]. He lost a piece in the opening in a game we played, but then used his engine to try to recover. Now the game seems equalized, but I confirmed only now with my own engine and he got all the moves. He even confirmed that used an engine. Please help to ban him.