Out of curiosity, how did you get male fragility from that?

Reading through it there were several effects mentioned.

• Testosterone makes men more likely to push to the highest level.

• Women are discouraged from playing chess, and so less are set on a course to be amongst the best.

• Women perform worse when they know they are competing against a man (thought to be a self fulfilling prophecy from stereotypes). Men don’t seem affected by this.

None of those seem to be male fragility.