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Creator M. Brett Duncan on May 12, 2012

HOW THE TRESSMEN MOVE
Each different Tressman has its own special way of moving and capturing enemy pieces. A capture is made by moving into a triangle occupied by an enemy piece. All captured pieces are removed from the board.
The two most valuable pieces are the Pharaoh and the Prince. They are rather restricted in their moves. They may move in any direction—but only one triangle at a time. The most powerful piece is the Queen. The Queen may move any distance in any direction.
The Priest moves in any direction for any distance, but only through the points and faces of the triangles alternately. When the Priest crosses the line forming the face of the triangle, the line of the face and the path of the Priest should intersect at a 90° angle.
The Pyramid may move any number of triangles but never through any points. The Pyramid’s path will always have one line on either side of it running in perfect parallel.
The Scarab Beetle’s move is curious—two triangles in the same direction as a Pyramid and then one triangle through the point farthest from the Scarab Beetle’s origin. This can be confusing but can be checked by making sure the Scarab Beetle has made a move that does not form a straight path that any other Tressman could travel and ending the move on the opposite colored space from which it began the move. An easy way to make this move is to begin by moving through one point of the triangle space occupied and continue straight forward two spaces, then move one space left or right. The Scarab Beetle’s move allows it to jump over intervening pieces.
A pawn may only move forward through the faces of triangles. Except on its first move when it may advance up to four triangles, it may only travel one triangle at a time.
In addition to these moves, there are certain special moves. A player may “go underground” when their Pharaoh or Prince is in check and when the Pharaoh and Prince are on two adjoining spaces. The Pharaoh and Prince move two spaces in any direction, even turning, and cannot be in two adjoining spaces after they move. This can be done any time the Pharaoh or Prince is in check and can be done as many times as desired. It cannot be done if they are not in check. They cannot attack during this move.
A Chariot reaching the row on the opposite side from where it started becomes any piece (except Pharaoh or Prince) that the owner of the Chariot chooses. It is thus possible to have two or more pieces with Queen’s privileges at the same time.
A Chariot makes a capture by moving through the points of the triangle spaces only and does not capture by moving through the faces. Remember to only move forward to capture.