A 2 player abstract game using a board made from separate square tiles, with channels at right angles to control movement. Players must get 4 of their 5 pieces across the board and can rotate a tile 90 degrees each turn. The new edition by Abacus is in card, with little wood posts to help lift and turn the tiles. The first edition is a nice wooden edition, part of a range of games by the firm Clemens Gerhards. - BoardGameGeek