World champion Magnus Carlsen says he will soon have more to say on the cheating claims scandal that has rocked the sport of chess.

The month-long saga has cast a shadow over the game since Carlsen first alluded to possible cheating by young rival Hans Niemann.

Niemann, 19, defeated Carlsen in the Sinquefield Cup earlier this month, in what was the biggest win of the teenager's career.

Carlsen then withdrew from the tournament, issuing a cryptic tweet which was taken as an indication he believed his less experienced opponent had cheated during the game.

The Norwegian added fuel to the fire when he then resigned after one move against Niemann in their next meeting, an online match during the Generations Cup.

Since then Carlsen has remained mostly tight-lipped, but did break his silence last week to say he believed it was "fairly easy to cheat" in chess.

Speaking on Sunday after winning the Generations Cup final against Indian Arjun Erigaisi, Carlsen said he would soon have more to say.

"I generally want … cheating in chess to be dealt with seriously," he said.

Niemann, an American grandmaster, has categorically denied he cheated against Carlsen in the Sinquefield Cup.

In an interview during the tournament following Carlsen's withdrawal, Niemann admitted to cheating twice online when he was 12 and 16, and said he had since been focused on repairing his reputation and becoming one of the best players in the world.

"This is the single biggest mistake of my life and I am completely ashamed, and I'm telling the world because I don't want misrepresentations and I don't want rumours," the American said.

"I have never cheated in an over-the-board game."

Niemann offered to play naked to prove he was not cheating.

There has been no evidence to suggest Niemann cheated during the Sinquefield Cup.