Imperial Cheops is played on a pyramid field of thirteen 3x3x3 cubes. Cubes are connected by their corner cells to upper and lower layer of cubes. The topmost cube is the Apex.
 

ARCHBISHOP [A]	slides diagonal or triagonal.
BISHOP [B]	slides diagonal.
DRAGON [D]	slides orthogonal or triagonal.
FAVOURITE [F]	slides orthogonal or diagonal.
GARGOYLE [G]	steps one or leaps to the next orthogonal, diagonal or triagonal cell.
HIPPOGRIFF [H]	leaps to the opposite corner of a 2x2x3 area.
KING [K]	steps one orthogonal, diagonal or triagonal cell.
KNIGHT [N]	leaps to the opposite corner of a 1x2x3 area.
QUEEN [Q]	slides orthogonal, diagonal or triagonal.
ROOK [R]	slides orthogonal.
UNICORN PAWN [U]	slides triagonal without capture, steps diagonal with capture. It may freely promote, excluding the King, when preforming a capture.
WYVERN [W]	leaps to the opposite corner of a 2x3x3 area.

Pieces only move through connected cubes.
 
The game is won by placing a Queen within the Apex cube and capturing the opponent King.
The game is drawn if both players have no Unicorn Pawns and Queens.
 
 
Imperial Cheops was developed from a brief description given in the novel "Dune" by Frank Herbert.