Tic-tac-toe, also called noughts and crosses and many other names, is a pen-and-paper game for two players, O and X, who take turns to mark the spaces in a 3×3 grid. The player who succeeds in placing three of their own marks in a horizontal, vertical or diagonal row wins the game.
This game is won by the first player, X:
More on [ Tic-tac-toe ]

Paper Games Plaza: Tic Tac Toe - Instructions for game play.
Meta Description: [ Pencil & paper games ]
David Molnar's Tic-Tac-Toe Variants - Describes variants on the game.
Guy Fawkes's Analysis of Boolean Tic-Tac-Toe - Analysis of variant that allows anti-play.
Math Lair - Tic-Tac-Toe - Game variations, looking from the mathematical side
Meta Description: [ A discussion of alternate forms of tic-tac-toe (a.k.a. ticktacktoe, tictactoe or tick-tack-toe) and the mathematics of these variants ]
The History of Noughts and Crosses - Article on the game's history.
Tic Tac Toe In Brief - Rules, variations, strategy, theory and practice. Includes an online version of the game.
Tic Tac Toe Strategy Solutions - Details a step-by-step process that allows the first player to win or draw, but never lose.
Meta Description: [ The ORIGINAL Tic Tac Toe strategy guide that shows how to win or draw, but never lose, at Tic Tac Toe. Learn how today! ]
Tic Tac Toe Top Secret - Description of a strategy against a member of the group that allows one to win or to draw.
Tic-Tac-Toe Strategy - Tic-Tac-Toe strategy with explanations and opportunity to put the advises into practice.
Meta Description: [ Tips and tricks to mastering Tic-Tac-Toe. ]
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