Hans Niemann is seeking $100 mln in damages from Magnus Carlsen and Chess.com|Stefan64|CC BY-SA 3.0

US chess grandmaster Hans Niemann, accused of cheating, sued Norwegian world champion Magnus Carlsen and Chess.com for defamation and is seeking $100 million in damages.

Niemann, in his lawsuit, claims Carlsen and Chess.com colluded to defame him, destroy his livelihood and bar him from the professional world of chess.