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Tic Tac Toe Rules


Tic Tac Toe is a two-player game where the first player to connect a line of pieces from one side or corner of the board to the other wins. With perfect play, the game cannot be won.


The standard board size is 3x3, but Igfip™ supports a range of square board sizes and obstructed spaces.

Initial Tic Tac Toe board position.  Alternative Tic Tac Toe board position.


Each player starts with no pieces on the board, but has an unlimited supply of pieces to place on the board.


  1. X moves first.
  2. A piece may be placed on any empty space.
  3. A player wins by being the first to connect a line of friendly pieces from one side or corner of the board to the other.
  4. The game ends when either one player wins or it is no longer possible for a player to win (in which case the result is a draw).

Tic Tac Toe Help


UnselectedSelected or MovedObstructions

Piece Placement

Place a piece by clicking on an empty board space.

Redraw Board

If you make an adjustment to your Web browser—such as changing your font size—while playing, the game pieces may no longer align correctly with the board. To restore proper alignment, select the Redraw command from the Tic Tac Toe menu.