World No. 1 Magnus Carlsen quit the World Rapid Chess Championship on Friday after he refused to change out of the jeans he was wearing, according to the International Chess Federation (FIDE).

Carlsen, who has won five world rapid and seven world blitz titles in the last 10 years, also withdrew from the World Blitz Championship which follows the tournament.

FIDE said in a statement that Carlsen breached the tournament’s dress code by wearing jeans, then declined to change his clothes after the Chief Arbiter requested him to and issued a fine of $200.

As a result, Carlsen would not have been paired for round nine, though he could have returned for the rest of the tournament had he not decided to walk away, per Chess.com.

Since he had performed poorly in the earlier rounds, there was little chance that Carlsen could have defended his title regardless.