By Madison Williams The 19-year-old grandmaster is suing Chess.com, rival Magnus Carlsen and others. Chess grandmaster Hans Niemann, who is at the center of a cheating scandal, has now filed a $100 million lawsuit against world champion Magnus Carlsen and others for defamation. One of the defendants is Chess.com, which is the outlet that brought allegations of Niemann’s cheating history to light in October. The overview of Niemann’s playing history was reviewed by The Wall Street Journal. Niemann tweeted a link to his lawsuit Thursday, writing, “My lawsuit speaks for itself.” His lawsuit claim…