Expensive gambit: U.S. chess master Hans Moke Niemann sues world champ over cheating charges

U.S. chess grandmaster Hans Moke Niemann, the target of cheating allegations at the highest level of the game, has made a counter-move against his accusers, filing a $100 million-plus lawsuit accusing world champion Magnus Carlsen of Norway, top U.S. grandmaster Hikaru Nakamura and one of the biggest online chess-playing services of “colluding to blacklist” him from competing.