Nine Board Tic Tac Toe is a variant of Tic Tac Toe played on nine boards arranged in a 3x3 grid. The first player's can go anywhere on the board; all moves thereafter are placed in empty spaces on the board corresponding to the square filled on the previous move. For example, if a mark is placed in the upper-left square of a board, the next mark must be placed in some cell of the upper-left board. If a player cannot move because the indicated board is full, the next move may go on any board. Victory is attained by getting three in a row on any board. This makes the game considerably longer and more involved than Tic Tac Toe, with a definite opening, middle game, and endgame.

A sample state of the game is pictured below. As you can see, the X and O players have each made several plays. It is X's turn to play, and he is required to in the middle board on the left.

In a subsequent lesson, you will be asked to formalize the rules of this game. Your goal in this assignment is to familiarize yourself with the game. To play a match of this game by yourself or with a friend, click on the following link and follow the instructions. Reload the page to play another match.