László Polgár (born 11 May 1946 in Gyöngyös), is a Hungarianchess teacher and father of the famous "Polgár sisters": Zsuzsa, Zsófia, and Judit. He authored well-known chess books such as Chess: 5334 Problems, Combinations, and Games and Reform Chess, a survey of chess variants.
László is an expert on chess theory and owns over 10,000 chess books. He is interested in the proper method of rearing children, believing that "geniuses are made, not born". Before he had any children, he wrote a book entitled Bring Up Genius!, and sought a wife to help him carry out his experiment. He found one in Klara, a schoolteacher, who lived in a Hungarian-speaking enclave in Ukraine. He married her in the USSR and brought her to Hungary. He home-schooled their three daughters, primarily in chess, and all three went on to become strong players. An early result was Susan's winning the Budapest Chess Championship for girls under 11 at the age of four. Also his daughter, Judit, could defeat him at chess when she was just five. He is an intense admirer of L.L. Zamenhof, the creator of the Esperanto language. Polgár's second language is Esperanto.