A Nixie Chess Board

A number of years ago I had the idea of making a chess board which used fibre optics to light up the squares pieces could move to. It was half instructional and half art, but my attempts at actually building it were half something else.
But there are more determined people than myself, and one of them has built a light up chessboard, but in a different way. It uses Nixie tubes as pieces, which apparently light up when they come in contact with the squares. There is some other circuitry involved, but nothing too complicated, and the creator is even selling it in kit form.
Further details about the Nixie Tube Chess Set can be found here.