Pickens writes: "Hou Yifan, a 16-year-old chess player from China, became the youngest world chess champion on Friday, in the final of the Women’s World Chess Championship held in Antakya, Turkey, toppling a record held since 1978. Currently, the top-ranked woman is Judit Polgar of Hungary, who is thought to be the best female player in history but Polgar, once ranked No. 8 in the world among all players, men and women combined, does not compete in women’s tournaments and did not play. No one really knows why the best female players are typically not as good at chess as the best men. One theory, common among some top male players, is that men are usually more aggressive by nature than women, and are therefore better suited to a game that simulates warfare. Another, cited in at least one university study, is that the talent pool among women has not been big enough to produce many great players. Ms. Hou said she had no idea why the gender disparity exists in chess, but whatever the reason, she says she finds men more difficult to play against."