There have been tensions between the FIDE organization and top players like Carlsen since the latter have been promoting an alternative chess organization around Freestyle chess (aka Chesss960), which has slightly different rules.
I.e. this is less about "dress code enforcement" and it is more about "Carlsen is fed up with the FIDE organization in general".
He wasn't trying to protest the dress code or make a scene, it wasn't on his mind at all. He had been out for an appearance with a sponsor during a break, then came back to the venue for the next round, and didn't notice that he was wearing jeans and it didn't cross his mind that that would be a violation.
Then he was told to change, and there wasn't enough time for him to go do that before the upcoming round. He thought he was told he could do it either after that round or for the next day, but then was told he would be excluded from that round, and at that point he said f--- it and withdrew entirely.
The controversy was about exactly how the penalty is imposed. The rule is a fine for the first violation and disqualification for multiple. It wasn't clear if his appearance for the day would count as one violation (so he could just incur the fine and wear correct clothing tomorrow), or if each round would be a separate violation. It also wasn't clear if he could play while in violation or would be excluded from each round until he changed. Precedent from other events wasn't clear for either of these.
The headline of "disqualified" is wrong and did not happen - he chose to withdraw.
I'm not saying I agree with the rule or the specific way it was applied... But Magnus definitely knows the rules.
Edit: for people downvoting... Can you please explain how the world's best chess player of all times wouldn't be familiar with FIDE rules? How is that even plausible? All of the players who compete at these events know the rules.
Magnus pants were fine. He is absolutely correct that they were singling him out and you can look back to many recent tournaments to see the clear double standard.
4.10.1. The dress code is strictly observed for the
tournament and all the official events and press
conferences.
4.10.1.1. Dress code for men.
Shoes: Oxfords, loafers, leather shoes or boots, classic
suite shoes.
Dark-coloured pants: black, navy, grey, beige, brown, in
any case unicoloured. No bright colours.
Long-sleeved light-coloured (white, light blue, beige,
brown, etc.), blue or black shirt, in any case
unicoloured. No bright colours.
Dark-coloured jacket, waistcoat or cardigan with
buttons: black, navy, grey, beige, brown, in any case
unicoloured. No bright colours.
Jacket, waistcoat or cardigan may be taken off during
play.
Tie is not mandatory.
[...]
4.10.1.3. No players with t-shirts, jeans, shorts,
sneakers, baseball caps or inappropriate dress are allowed
in the playing area. Any requests to wear national or
traditional dress shall be approved by FIDE Supervisor.
[...]
4.10.9. If a player fails to fulfil his/her duties listed
in Articles 4.10.1, 4.10.4 – 4.10.8, he/she can be
penalised by FIDE Council as follows: 5% of his/her prize
money shall be forfeited to the Organiser and a further 5%
to FIDE for each breach. In cases of serious misconduct,
the player may be disqualified from the event.
Reference: https://www.fide.com/docs/regulations/wrbc_regulations_2024_...Refusing to match him with a competitor because of this, effectively preventing him to compete, was disproportionate regardless.
Edit: I see you added a section that specifically disallows jeans after I posted my comment. We could have saved some time.
4.10.1.3. No players with t-shirts, jeans, shorts,
sneakers, baseball caps or inappropriate dress are allowed
in the playing area. Any requests to wear national or
traditional dress shall be approved by FIDE Supervisor.
Reference: https://www.fide.com/docs/regulations/wrbc_regulations_2024_...It's entirely possible to read 4.10.1.1, conclude that blue jeans are fine, and then skim over 4.10.1.3.
However the Carlsens read it, after reading it, years will have passed. Carlsen didn't dress like he did after a studious read of the rules. He just put on some nice clothes that were no different from what he usually wears at tournaments.
Except he forgot a belt. A proper organiser would have offered to lend him one.
This is some combination of
- "I'm above the law"
- teenage rebellion
- protest against the system