You move the 3 red dots into a straight line passing the middle point. Click “Reset” to restore the board to the original setup. Click “Settings” to see short instructions, turn sound on or off, turn random move mode on or off, and see total wins and losses of the games you have played.
The computer will try to win if there is a chance and prevent you to win if possible. It will play randomly if no obvious moves available. It will try to play the best move if random move is turned off. But this will make computer to play the same move in the same board setting. No one can win the game if both play carefully. The goal is not to make error first.