I would not trust Kasparov's opinions:
CW: Misogyny
Well, in the past, I have said that there is real chess and women’s chess. Some people don’t like to hear this, but chess does not fit women properly. It’s a fight, you know? A big fight. It’s not for women. Sorry. She’s helpless if she has men’s opposition. I think this is very simple logic. It’s the logic of a fighter, a professional fighter. Women are weaker fighters.
There is also the aspect of creativity in chess. You have to create new ideas. That’s quite difficult, too. Chess is the combination of sport, art and science. In all these fields, you can see men’s superiority. Just compare the sexes in literature, in music or in art. The result is, you know, obvious. Probably the answer is in the genes.