Significantly, the earliest surviving treatise to describe the modern movement of the queen (as well as the bishop and pawn), Repetición de amores e arte de axedres con CL iuegos de partido (Discourses on Love and the Art of Chess with 150 Problems) by Luis Ramírez de Lucena, was published during the reign of Isabella I of Castile. Even before that, the Valencian poem Scachs d'amor ("Chess of Love") depicted a chess game between Francesc de Castellví and Narcís de Vinyoles and commented on by Bernat Fenollar, which clearly had the modern moves of the queen and the bishop. Well before the queen's powers expanded, it was already being romantically described as essential to the king's survival, so that when the queen was lost, there was nothing more of value on the board.
