Trained in her early years by her sister Susan, who ultimately became Women's World Champion, Judit Polgár was a chess prodigy from an early age. At age 5, she defeated a family friend without looking at the board. After the game, the friend joked: "You are good at chess, but I'm a good cook." Judit replied: "Do you cook without looking at the stove?" However, according to Susan, Judit was not the sister with the most talent, explaining: "Judit was a slow starter, but very hard-working." Polgár described herself at that age as "obsessive" about chess. She first defeated an International Master, Dolfi Drimer, at age 10 and a grandmaster, Lev Gutman, at age 11.