A morality masterpiece, The Caucasian Chalk Circle powerfully demonstrates Brecht's pioneering theatrical techniques. This version by Frank McGuinness was published to coincide with the National Theatre's production which toured the UK in 2007.A servant girl sacrifices everything to protect a child abandoned in the heat of civil war. Order restored, she is made to confront the boy's biological mother in a legal contest over who deserves to keep him. The comical judge calls on an ancient tradition - the chalk circle - to resolve the dispute. Who wins?This version by Frank McGuinness was first presented by the National Theatre in 1997 and revived in 2007, opening at the Gulbenkian Theatre, Canterbury, on 8 January.