I’ve never figured out: HOW is 3-D chess played anyway? Did Roddenberry ever come up with rules for it?
LOL... He does not play 3D chess. Those boards rotate. It is not just the variables of X Y and Z. Include rotation. Trump plays 4D chess and is the galactic grand master at it.
The 4D rules are very very hard to grasp.
The 3D ones are simple: https://sites.google.com/site/caroluschess/movies/star-trek/star-trek-3d-chess-rules