SBTicTacToe app for iPhone and iPad

Tic Tac Toe is a simple game which, if played optimally by both players, will always result in a tie. However, many players (especially younger children) still enjoy it, and Tic Tac Toe can be made significantly more complex by increasing the size of the board. Playing Tic Tac Toe on a 3x3 Board

X always goes first.

Players alternate placing Xs and Os on the board until either (a) one player has three in a row, horizontally, vertically or diagonally; or (b) all nine squares are filled.

If a player is able to draw three Xs or three Os in a row, that player wins.

If all nine squares are filled and neither player has three in a row, the game is a draw.