A player is said to have the opposition when he can place his King directly in front of the adverse King, with only one square between them. This is often an important advantage in ending games.

If either player abandon the game by quitting the table in anger, or in an otherwise offensive manner; or by momentarily resigning the game; or refuses to abide by the decision of the Umpire, the game must be scored against him.

The Bishop and Knight, in contradistinction to the Queen and Rook, are called Minor Pieces.

If, 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.

In Castling, the King must be moved first, or before the Rook is quitted. If the Rook be quitted before the King is touched, the opposing player may demand that the move of the Rook shall stand without the Castling being completed.

The Bishop moves diagonally forwards or backwards, to the extent of the Board.

The Chess-board must be placed with a white square at the right-hand corner.