This is a true and extraordinary feature film about how learning to play chess in the slums of Kampala (Uganda) transformed the lives of many children, but especially one girl who went on to become a world champion. It is filmed in Kampala and beautifully acted by local children with enormous natural talent. It is profoundly moving and one of the best films I have ever seen.

It is on BBC2 from 1.15-3.15 TODAY, Saturday 10th October.