A Long Island man claims he was kicked off Chess.com and slapped with a scarlet “C” — for chess cheat.

“I was put on a cheater list,” chess teacher Henry Despres claims in a lawsuit. “Everyone on the site could see this. I, of course, never cheated.”

Despres is claiming in a Brooklyn federal court suit that he is owed an apology, along with $200,000 damages because of defamation, libel and the loss of chess lessons and book sales.

Chess.com did not return a message seeking comment.