An abstract strategy game with four 3x3 grids arranged into a larger 6x6 grid. Players alternate placing marbles on the board, one player has white marbles and the other has black marbles. The first player to get five in a row on the entire 6x6 grid wins, but there is a new twist: Every time you place a marble you also turn any one of the games four boards (3x3 grid) 90 in either direction. The ever-changing game board makes the game all the more challenging.See Pentago XL for its four-player successor. online play: http://www.pentago-online.com/ - BoardGameGeek