In the 1984 World Chess Championship, 1980 World Junior Champion and international grandmaster Gary Kasparov faced reigning world champion Anatoly Karpov. The longest title match in chess history, it was aborted after 5 months of play and 48 games, after chess officials concluded that it was taking too great a psychological and physical toll on Karpov, who was leading but appeared likely to lose. Kasparov won a rematch 6 months later, becoming the youngest world champion ever. How old was he? Discuss