I've been a great fan of Star Trek since it first aired when I was young. Over the years, I have seen this tri-dimensional chess game featured on several of both the old and new episodes.
 
I have search many places for coherent rules but none reflected the type of play presented by the actions of the characters during the scenes which featured gameplay. Movement of the pieces between the fixed boards and movement of the smaller 'attack' boards.
 
I recall one episode in which Spock, or was it Kirk?, moves a piece from a lower fixed board to an 'attack' board located above the upper fixed level. I also recall an episode in which a player re-orients an 'attack' board and re-loads it with pieces.
 
From this I began to visualize potential rules for the movement of pieces and 'attack' boards.
 
I present here my version. There may be similarities to others and I offer my apologies. I assure the reader that every rule was carefully considered by myself and tested for playability.