A game, also known as "Noughts and Crosses", in which players take turns placing marks on a 3 × 3 grid in an attempt to form a line of three consecutive marks. You can also use this tag for variants of the game.
Also known as "Noughts and Crosses", Tic-tac-toe is a game in which players take turns placing X and O marks on a 3 × 3 grid. The first player to form a line of three consecutive marks, either horizontally, vertically, or diagonally, wins.
If each player plays optimally, the game should always end in a draw.
See also: connect-four.
