Moscow, in the autumn of 1984, was the setting for a clash between two of the all-time greats of chess: defending champion Anatoly Karpov, the most deadly tournament player in the history of the game, and Gary Kasparov, the 21 year old from Baku who would become the youngest ever World Champion were he to overthrow his rival. This gruelling test of contrasting character, style and sheer physical reserves roused a wave of media interest and thrust chess into the forefront of public attention.