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Ultimate *Tic Tac Toe
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You probably know the original Tic Tac Toe game. If not: it's a simple game where one player is the *X* and the other player is the *O*, playing on a field of 3x3 squares. The players take turns picking one of the squares that is not occupied. When one of the players gets three squares in a row, horizontal, vertical, or diagonal, that player wins.

Now Ultimate Tic Tac Toe is quite similar, except each square in the field is actually small game of Tic Tac Toe. Only if you win the small game, you get the square of the big game. The goal again is to get three (big) squares in a row. Further rules will be explained below. This game requires quite a bit of strategy because you can influence which of the big squares your opponent has to play in. We're very excited to see how good bots can get in this game, so start coding and show us what your bot can do! If you have any questions, suggestions or if you've found a bug, please post on the discussion page.