The long-standing feud between Hans Niemann and Magnus Carlsen escalated once again, as the American Grandmaster launched a personal attack on the Norwegian chess icon via social media.

Freestyle Chess Grand Slam tour boss Jan Henric Buettner and all-time great Magnus Carlsen have called on International Chess Federation (FIDE) president Arkady Dvorkovich to resign after talks over an agreement about the new series fell through.

Magnus Carlsen, a 34-year-old Norwegian, is among the greatest chess players of all time.

“The organizers of the “Freestyle Chess Tour” fully deleted from its Regulations the reference to the “World Championship” title. Following this change in the regulations, players wishing to participate in the 2025 “Freestyle Chess Tour” are no longer required to sign the waiver note,” said the updated FIDE statement.

World No.1 Magnus Carlsen has accused FIDE of coercion and broken promises after its dispute with Freestyle Chess escalated. The feud centers on FIDE's opposition to Freestyle's use of the "World Championship" title.

Disagreement over right to regulate any 'World Championship' and waiver for players to appear in unsanctioned league

Further talks with Fide futile, says Freestyle Chess promoter Jan Buettner; Fide says Freestyle Chess refused to acknowledge its status as sole regulator of the World Championships

Five-time World Chess champion, Magnus Carlsen has won the first-ever Freestyle Friday tournament on Chess.com. The Norwegian grandmaster was challenged by some of the best players in the world including his long-time rival Hans Niemann, world number two Hikaru Nakamura, and Ian Nepomniachtchi.

Arkady Dvorkovich is under fire after talks over an agreement about the new series fell through. Read more at straitstimes.com.

Fide has been unequivocal about not wanting to part with its sole authority over the ‘World Championship’ title