The Bishop and Knight, in contradistinction to the Queen and Rook, are called Minor Pieces.
Howard StauntonTo play with correctness and skill the ends of games, is an important but a very rare accomplishment, expect among the magnates of the game.
Howard StauntonIf, during the course of the game, it be discovered that any error or illegality has been committed in the moves of the pieces, the moves must be retraced, and the necessary correction made, without penalty.
Howard Staunton