Tic-tac-toe, mainland, Taiwan is also called the jingziqi, ooxx; also called OX chess game, well, Hongkong called tic-tac-toe, tic-tac-toe, is a pencil and paper game. The two game player, a circle ( O ), a cross ( X ), turns up in 3 by 3 grid to play their own symbols, the first to cross, straight, oblique line for the win.