A three-dimensional challenge - from solid wood Is played on a lavishly designed game board made of solid oiled beech and the pieces being walnut and maple. Four wells, the "black holes", are refined with dark felt. The aim is to bring the first player to own four of the pieces in the right position before the "black holes" and to sink. One's playing pieces may simply move by tilting, turning and by the black holes assisting. Tactically, it is important to leave little room for paths. With little to block, their own movement may help their opponent.