Chess World Champion Magnus Carlsen has accused fellow Grandmaster Hans Niemann of cheating “more and more” than what he has already admitted, saying that he will not play against any rival indulging in such wrongdoing. Carlsen put out a statement late on Monday night, a week after he withdrew against the American after just one move at the Julius Baer Generation Cup. 

Earlier, the 31-year-old Norwegian had quit the Sinquefield Cup in Saint Louis following his surprise defeat against Niemann. “I believe that Niemann has cheated more and more recently- than he has publicly admitted,” Carlsen wrote.