How old was Judit Polgar when she learned to play chess? I found a few publicly accessible biographies of Judit Polgar, including details of her early life. According to the biography on Judit’s website, she was 9 when she first won an international chess tournament. According to this SuccessStory article, she began participating in tournaments at the age of 6. According to this article from “All That’s Interesting”, she was able to beat her father by the age of 5.
But how old was she when she learned how to play?
In her TED talk Giving checkmate is always fun, Judit Polgar says (t=0:59):

My mother taught me the first moves when I was about five years old...