Sitting around a fire station waiting for the off is nothing unusual. We all find something to beat off the boredom. Some play cards; others watch videos. Whatever it takes.
In Seb’s case, it was designing a holograph of a three-dimensional chessboard to see all 512 squares at once, and I mean all. Not easy with eight ordinary chessboards stacked one on top of the other. Every square got his attention. He changed their colours, varied their translucencies and even altered the thicknesses of their outlines. No matter what he did, the result did not pass his acid test of seeing all the squares along any diagonal.
His comp-stick went everywhere with him. I’d once seen him unfurl it on a pub table, build the holograph chessboard and patiently adjust the shade of one square for over an hour. Of course it was with him at the Saint Philips fire.