The King is the Divinity of the City.
The Queen has Authority in the City.
The Bishop has Territory.
The Rook prosecutes the Queen’s Warrant in the Territories.
The Knight has Ambition.
The Pawn has Family.
These conditions are exclusive; they are a source of envy and the reason a Knight becomes Bishop, Rook becomes Queen, Pawn is made King, and Queen becomes a Knight.
All of these transactions are commonplace through the ages. The only exchange noted in history is when the King’s cup is taken; then the meaning of Divinity is called into question.