tic tac toe

"Tic Tac Toe" and "Noughts and crosses" redirect here. For other uses, see Tic Tac Toe (disambiguation) and Noughts and crosses (disambiguation).
Tic-tac-toe
Tic tac toe.svg
A completed game of Tic-tac-toe
Genre(s) Paper-and-pencil game
Players 2
Setup time Minimal
Playing time ~1 minute
Random chance None
Skill(s) required Strategy, tactics, observation
Synonym(s) Noughts and crosses
Xs and Os
Tic-tac-toe (American English), noughts and crosses (British English), 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.

The following example game is won by the first player, X: