三子棋游戏。两个游戏者在3*3的网格中轮流做标记，如果一个游戏者在网格的水平、垂直或者对角线上做了连续3个标记，则获胜。若网格填满而没有获胜者，则显示平局-Three sons chess game. Two games in the 3* 3 grid in turn mark, if a player in the grid horizontally, vertically or diagonally to do three consecutive markers, then win. If you fill the grid with no winner, a draw is displayed