This girls team was winning because the boys haven’t gone through puberty yet. Not saying it was ok to ban them, but it’s false to claim that differences in bone mass and muscle density are imaginary. It just doesn’t happen until after puberty.

And chess isn’t exactly segregated by gender. The women’s league exists to make women in chess more visible, to make it easier to pursue sponsorships, and to encourage more women to join the game. But women are free to compete in the “men’s” category (which is actually called the “open” category), and often do. The reasons women haven’t gotten to the top of it yet are cultural; women are discouraged from starting to play the game at a young age as all the top players do, and so far fewer women attempt the climb in the first place. But it will happen eventually.

Now if you want to talk about how transphobic FIDE is, there’s some real merit in those accusations. Their rules around people who are transitioning are nonsensical, punishing people for absolutely no reason. But the women’s league itself exists for good reasons.