From the beginning until the end of the 15th century the pieces we call bishops and queens had limited movement, and it took longer to get the pieces into action. In modern chess, the original pieces evolved into the modern pawn, knight, bishop, and rook, respectively.<ref name="H/W">Hooper, David and Whyld, Kenneth 1992. "The Oxford Companion to Chess" 2nd ed, Oxford University Press. </ref>