Tic Tac Toe for Chrome
Play Tic Tac Toe against the computer with boards of 3x3, 5x5 and 7x7. Algorithm is designed so you could win but is also using Artificial Intelligence so over time, the computer will become smarter (if you are, of course)
Tic-tac-toe (also known as noughts and crosses or Xs and Os) is a paper-and-pencil game for two players, X and O, who take turns marking the spaces in a 3×3 grid. The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row wins the game.