This game is pretty close to real reversi. To learn more about this game, search the Internet for dedicated sites. In few words, the rules of the game are following. The cell can be occupied if it is empty and there is a closing cell on a horisontal, vertical or diagonal line. All the cells between currently occupied cell and the closing cells take the color of the player. The game stops if nobody can make a move. Winner is the player whose cells are dominant.