Tic-tac-toe has been around since the ancient times. Usually played with an 'X' and 'O' on a 3x3 matrix, this paper-and-pencil game is very popular with kids even today. Because of the simplicity of Tic-tac-toe, it is often used as a pedagogical tool for teaching the concepts of good sportsmanship. And now, the old classic Tic-tac-toe is back.