Notakto vs Tic-Tac-Toe: How Reversing the Rules Changes Everything

Notakto and tic-tac-toe share a 3×3 grid and almost nothing else. Change three rules of the schoolyard game (who marks, what counts as the goal, and how many grids you play) and the dead-simple draw turns into a game that is fully solved yet genuinely hard to play. This is what each change does.

For the rules in full, see what is Notakto.

Tic-Tac-Toe, and Why It Goes Stale

Ordinary tic-tac-toe gives each player their own mark, asks them to make a line, and is played on one grid. Once both players spot the basic threats, every game ends the same way, a draw, and there is nothing left to discover. The game is not broken; it is simply too small, with too few real decisions, to stay interesting past childhood.

Notakto keeps the grid and throws out everything that made it stale.

Change One: Everyone Plays X

In Notakto there is no O. Both players place the same mark, which makes the game impartial: the moves available to you are exactly the moves available to your opponent, because a position is just a pattern of X marks, not “mine” and “theirs”. That single change is what connects Notakto to a whole branch of game theory, impartial games, and to Nim, the game it secretly is.

Change Two: Completing a Line Loses

This is the misère twist. The line you spend ordinary tic-tac-toe trying to build is now the thing you must avoid. Reversing the objective sounds cosmetic, but it inverts every instinct: a move that looks like progress is a move toward your own defeat, and positions become genuinely hard to read because the danger is in finishing, not in falling behind. Misère play is a category of its own: Triad, on six dots instead of nine cells, lives in the same world; see misère games.

Change Three: Several Boards at Once

A single Notakto board is still a solved trick: mark the centre, then answer with a knight’s move, and you can force the win (centre, then a knight’s move). The depth arrives when you play two or three boards together. Now each move changes the balance across all of them, killing a board becomes a deliberate choice about tempo, and the question is no longer “can I make a line” but “who is forced to finish the last board”. That is where the thinking is, and it is covered in how to win at Notakto.

No More Draws

Put the three changes together and the draws vanish. A 3×3 grid cannot be packed with X marks without forming a line, so every board eventually dies and one specific player is forced to complete the last one. Every game has exactly one loser: the certainty that makes Notakto solvable, and the thing tic-tac-toe could never offer. Whether “solvable” makes it dull is its own question: is Notakto solved?

Play Notakto now and feel the difference three changed rules make.