After the jeans controversy is resolved, Carlsen will return to the chess championship

Carlsen, a five-time chess champion, was fined $200 (£159) last week for breaching the tournament’s dress code.

He said he wore jeans to a dinner date and “didn’t even think” to change them on the way to the tournament.

He had already played several rounds in a t-shirt, blazer and jeans before he was flagged for breaking the dress code.

The Grandmaster said that he offered to change his pants the next day, but he told him that it was urgent and he refused.

Later, Carlsen withdrew from the competition and said he would leave the city.

“Nobody wants to go back… I’ll probably go somewhere where the weather is a little nicer than here,” he said.

Announcing the changes to the dress code on Sunday, Fide president Arkady Dvorkovich said: “The principle is simple: it is still required to follow the official dress code, but with subtle little deviations (in particular, jeans that match the style of clothing may include a jacket) allowed.”

He said tournament officials would be required to judge whether clothing conforms to relaxed codes, adding that he hoped players would not “abuse this extra flexibility” to “spoil the festive spirit” at the New Year’s Eve tournament.

In a social media post on Sunday, Carlsen said: “Oh, I’m definitely going to play in jeans tomorrow.”

Fide has previously said its dress code rules are designed to “ensure fairness and professionalism for all participants”.