The origin of the name of the chess bishop is obscure. It was introduced in the 15th century, taking the move of the courier and placed where the alfil used to be at the set up of the chess pieces on a chessboard. The appearance of the Muslim fil was formless but with two protuberances said to symbolize the elephant from which the piece derives its name. Perhaps these suggest the Bishop’s mitre, hence Bishop, the name used in English-speaking countries since the new game gained acceptance. The original move of the bishop was only three squares diagonally. By 1500 it could move to any open square diagonally.