I have love Tridimensional Chess since I saw it in Star Trek and then Big Bang Theory makes me crave for it even more and now you can buy this Star Trek merchandise from ThinkGeek. For a half-scale replica of the game board used in the show with 24 kt gold and silver pieces, you’re going to have to shell out around $274.99. It is not cheap but hey it is a lot of fun and it is made of Gold and Silver!
There are actual rules for Tridimensional chess and you can check them out here.
Just for the sake of nostalgia check out the video below.