At this point, I think the only way to end this nonsense is for the girls to refuse to play against boys pretending to be girls because they aren't good enough to compete against the boys.

It is particularly bad in the physical sports like boxing, but as shown in this article, it is a problem in all sports.  There is a reason girls and boys have separate sports.  If it makes people feel better, call them XX and XY sports and avoid the hurt feelings, but that is the only consideration that should be allowed. 

 This is what happens when your IQ is too low and your EQ is too high 

 Physical sports might be the dividing line. I saw this picture of a woman in a shooting event next to this other guy Dikeç who is going viral for being so casual, like he's a hitman, and I don't have a problem with that.

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 The competition from the picture is mixed doubles, they are competing for the same side, even in shooting they have M and W categories for single competitors  

 The only sport i remember from top of my head that you can compete M and W in a fair competitive level are Darts, there's no advantage by sex, the only real disparity is the numbers of male competitors, but last year there had a women that reached semi finals in the world championship, only by her merits  

 IIRC women are supposed to have an advantage in endurance swimming due to higher body fat