 A completed game of tic-tac-toe | |
| Other names |
|
|---|---|
| Genres | Paper-and-pencil game |
| Players | 2 |
| Setup time | Minimal |
| Playing time | ~1 minute |
| Chance | None |
| Skills | Strategy, tactics, observation |
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.