I couldn't find the reference picture, but I regularly play tri dimensional chess.
I found a set of rules, written by a fighter pilot, to help teach three dimensional fighter tactics and it's a really great game.
Gettinghold of a decent board is hard though, as the current best selling comercially available board is so wonky, it makes playing difficult.
Tri-Dimensional Chess

I was just curious if there was a game type out there that offered a 3D chess play or if anyone has any knowledge of one being made for online play.. here is a pic for reference to what i am talking about.. thank you in advance....