Judit Polgar

Hungarian chess grandmaster — the strongest female chess player in history — who defeated 11 world champions including Kasparov, Karpov, and Anand — and whose father László Polgár's educational experiment (intensive early chess training of all three daughters) became famous as evidence for deliberate practice theory.

Proves that deliberate early specialization can produce chess ability approaching the absolute world elite regardless of gender — Judit's defeat of reigning world champions is the primary empirical evidence against the argument that women are cognitively limited in chess.