Liz Garbus’ fascinating documentary charts the turbulent life – from a childhood of isolation and neglect to young chess prodigy, world champion and subsequent madness and disgrace – of one of chess’s undisputed masters. The World Championship of 1972, Fischer vs Spassky, took on literally Cold War significance as a nation pinned its hopes on Fischer as the man to end Soviet dominance. Garbus has mined, to brilliant effect, the wealth of astounding archive footage from this the Golden Age of the game.