Josh Waitzkin
Josh Waitzkin is a chess master and martial artist used in this wiki as an example of cross-domain skill transfer. In the-power-of-belief-mindset-and-success, Eduardo Briceno presents him as someone who did not just master one field, but learned how to improve in a way that could be reapplied elsewhere.
What matters here is not his biography in full. It is the role he plays in the argument for growth mindset: the idea that ability is not merely discovered but built, and that the methods of growth can travel across domains.