British rhythm and blues (or R&B) was a musical movement that developed in the United Kingdom between the late 1950s and the early 1960s, and reached a peak in the mid-1960s. It overlapped with, but was distinct from, the broader British beat and more purist British blues scenes, attempting to emulate the music of American blues and rock and roll pioneers, such as Muddy Waters and Howlin' Wolf, Chuck Berry and Bo Diddley. It often placed greater emphasis on guitars and was often played with greater energy.