Be cautious of playing your Queen in front of your King and in subjecting yourself to a discovered check. It is better when check is given to your King to interpose a man that attacks the checking Piece than with one that does not. ↗
A Rook is of the value of five Pawns and a fraction, and may be exchanged for a minor Piece and two Pawns. Two Rooks may be exchanged for three minor Pieces. ↗
For playing a man to a square to which it cannot be legally moved, the adversary, at his option, may require him to move the man legally, or to move the King. ↗
Having marshalled the men in battle order, as shown in the first diagram, you will observe that each party has two ranks of men, on the first of which stand the superior Pieces, and on the next the eight Pawns. ↗
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. ↗