Tic-tac-toe

Tic-tac-toe (American English), noughts and crosses (Commonwealth English), or Xs and Os (Canadian or Irish English) is a paper-and-pencil game for two players who take turns marking the spaces in a three-by-three grid with X or O. The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row is the winner. It is a solved game, with a forced draw assuming best play from both players.

"Noughts and Crosses" and "Tic Tac Toe" redirect here. For other uses, see Noughts and Crosses (disambiguation) and Tic Tac Toe (disambiguation).

Tic-tac-toe
A completed game of tic-tac-toe
Other names
  • Noughts and Crosses
  • Xs and Os
GenresPaper-and-pencil game
Players2
Setup timeMinimal
Playing time~1 minute
ChanceNone
SkillsStrategy, tactics, observation
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