Numbered pucks racked in a triangle on a smooth board, flicked with a finger instead of struck with a cue, so a whole game fits on a dining table. The board spins, which is the actual invention: two or four players stay seated and turn it to bring the striker in front of them. Jack Furnival built the first one because a snooker table would not fit his terraced house, and he and George made every board themselves for five years before licensing it out.