Magnus Carlsen, a five-time world champion and reigning World Rapid and Blitz champion, faced disqualification from the 2024 tournament due to a dress code violation. FIDE, the global chess governing body, enforced the penalty after Carlsen wore jeans.
This was a breach of the competition's formal attire requirements. Carlsen was initially fined $200 and instructed to change into formal attire by Chief Arbiter Alex Holowczak. Carlsen was aware of the rule that jeans were explicitly prohibited.

It was prohibited under long-standing rules and Carlsen refused to comply. Instead, he requested to adhere to the dress code from the next day, a proposal FIDE rejected. Consequently, he was not paired for Round 9, and his disqualification followed.
FIDE, in a statement, reiterated the importance of professionalism and fairness:
"The dress code regulations are designed to ensure professionalism and fairness for all participants. Mr. Magnus Carlsen breached the dress code by wearing jeans. He was fined and given a chance to change his attire but declined. This decision applies equally to all players."
The organization also highlighted a similar case involving Ian Nepomniachtchi, who complied with the rules after being fined for wearing sports shoes.
Carlsen expressed frustration, labeling the dress code "stupid" and criticizing FIDE's handling of the situation. Speaking to NRK, a Norwegian broadcaster, he said: "I am pretty tired of FIDE, so I want no more of this. I don't want anything to do with them. Maybe it's a stupid principle, but I don't think it's any fun."
In a YouTube interview, Carlsen elaborated on the circumstances, admitting he overlooked the jeans issue but refused to back down on principle: "I barely had time to change. I put on a shirt, a jacket, even changed my shoes, but I didn't think about the jeans. When told to change immediately, I declined. It became a matter of principle."
Viswanathan Anand Says
FIDE Deputy President and former world champion Viswanathan Anand defended the decision. Speaking to ChessBase India, he stated: "It wasn't personal but procedural. We offered options, but Magnus refused. The rules are clear, and his disqualification followed protocol."