
Chess grandmaster Hans Niemann alleges in a federal lawsuit that chess world champion Magnus Carlsen and others destroyed his career by falsely accusing him of cheating.
Niemann is seeking $100 million in damages in the lawsuit filed Thursday in U.S. District Court in St. Louis, elevating a controversy that has roiled the chess world since September, when Carlsen suggested Niemann cheated during his upset win over Carlsen at the Sinquefield Cup tournament in St. Louis.