Here's a thought-- as to why "prodigies" tend to be male... in all but a few areas:
Perhaps this is either a nurtured/innate difference in level of competitive/cooperative tendencies in the individual. Girls are frequently taught by well-meaning parents, extended family, and other caregivers from a rather young age that being "competitive" is not very feminine, at the very least. Those messages are pretty insidious and difficult to avoid. Girls learn quite young that being a cutthroat competitive personality is a route to social misery, at least within one's own gender. Some of that seems to be biologically driven.
There is no way to play chess "collaboratively" so that nobody loses. KWIM?
Males being more competitive is consistent with their being more focused or obsessive and more likely to convert innate ability into prodigy-level performance. As I know from experience, if winning at chess is very important to you, you are more likely to put in a lot of time studying and practicing.
