Chicago's Chess Records was one of the greatest labels of the post-war era, ranking alongside other mighty independents like Atlantic, Stax and Sun. From 1950 till its demise at the end of the 60s, Chess released a myriad of electric blues, rock 'n' roll and soul classics that helped change the landscape of black and white popular music. Chess was the label that gave the world such sonic adventurers as Chuck Berry, Muddy Waters, Bo Diddley, Howlin' Wolf and Etta James. In this BBC 4 documentary...