Niemann "had cheated more than he admitted," according to Carlsen

Niemann claims to be "clean" now after cheating as a youngster

After upsetting the chess community by abandoning a game after only one move one week earlier

Hans Niemann, 19, was accused of lying by Magnus Carlsen, the current world champion

Elite chess has been rocked this month by bombshells

Grandmaster of chess Andrew Tang gave Carlsen credit for bringing up “an problem

Carlsen, a long-time world chess champion, support up his claim against Niemann

He claimed "unusual" advances in Niemann's global ranking

On September 4, both players underwent a security check before their live game

In the last three weeks Carlsen has been accused of not being transparent enough