Ultimate Tic-Tac-Toe

Play the Game

What is Ultimate Tic-Tac-Toe?

Based on the little I know, Ultimate Tic-Tac-Toe (UTTT) is a variation on the classic game, where winning a smaller game wins a player one square on the bigger game.

To make it even more interesting, the location of the previous turn dictates where the next turn can be played. The whole game is won when the big board is won with three in a row of smaller game wins.

The Math

Since normal Tic-Tac-Toe is so small with so few possible gamestates, it is a solved game. However, the sheer number of gamestates in UTTT makes it nigh impossible to solve fully. There are many, many people developing AI/ML tools to find strategies to play against others, however.