A simple Elm implementation of Ultimate Tic Tac Toe.
How to play:
The goal is to win three games of Tic Tac Toe in a row. The first player can play in any of the small boards. From then on the small board a player must use is determined by the previous move of the opponent. When you have to play in a board that is already decided, you can choose freely. A good explanation can be found here.