Pyramid chess; nine-level chess with the double object of putting your queen at the apex and the opponent's king in check.

According to the Terminology of the Imperium appendix of Dune, Cheops is a nine-level pyramid chess game with the double object of putting the queen piece at the apex and the opponent's king in check.

It had been once played on Arrakis by Crown Prince Leto Atreides II and his younger twin-sister, Crown Princess Ghanima Atreides I.