According to the blurb:
The emergence of the Polgar sisters in the 1970s and 80s rocked the chess world. In a heavily male dominated game, the three Hungarian girls broke record after record. The youngest, Judit, was talked of as a potential world champion.It's on at 2.15 this afternoon, and presumably available subsequently on iPlayer.
The Chess Girls is the story of their parents, Laszlo and Klara Polgar, and how they defied the Communist authorities to conduct a remarkable educational experiment. Laszlo Polgar, convinced that any healthy child can be trained to become a genius, set out to prove his theory with his own children.
This is a drama-documentary with excerpts from an interview with Laszlo and Klara Polgar recorded for the play. The writer, Lavinia Greenlaw, takes their account and re-creates the lives of the young Polgar family in their tiny Budapest flat. The fictional Laszlo is played by Kerry Shale, and Klara by Sally Orrock.
[Thanks to Richard for this]