“I know that my actions have upset many in the chess community.

I am disappointed.

I want to play chess.

I want to continue playing chess at the highest level in the best tournaments.

I think cheating in chess is a big problem and a threat to the game,” Carlsen tweeted.

According to him, he does not want to play against people who have repeatedly cheated in the past, because he does not know what they are capable of in the future.

“I believe that Niemann cheated more than he publicly admitted.

His progression was unusual, during our play at the Sinquefield Cup I got the impression that he was not tense or even fully concentrated on playing in critical positions, beating me with black in a way that I think only a handful of players can do.

This game helped change my point of view,” added Carlsen.

Carlsen did not finish the Grand Chess Tour online tournament in St. Louis (USA) after losing to Niemann in the third round.

The Norwegian hinted at the foul play of an American who used computer prompts as a child.

The 19-year-old American broke the world champion's 53-game unbeaten streak.

Earlier, the President of the International Chess Federation (FIDE), Arkady Dvorkovich, spoke about the incident involving Carlsen and Niemann.