Also known as X and 0, this game allows you to play with another person or with the computer. You must create a full line (vertical, horizontal, diagonal) with X or 0. It is also known as crosses and originally was played with pencil and paper.
You can play on a board with 3×3, 5×5 or 7×7 squares for an increased difficulty and more fun. When there are more1 squares, you must make a limited number in a row, not the full line.
This game will stimulate your intelligence, but is not so complicated.