The Queen combines the power of Rook and Bishop--_i.e._, the Queen may move
and take horizontally or vertically like a Rook, or upon diagonals like a
Bishop. It is, therefore, the most powerful piece on the board, because not
only has it the power of Rook and Bishop, but it has also the privilege to
move like either of the two Bishops, according to the colour of the
diagonal it may for the time being stand upon. {340}