Tic Tac Toe Extreme uses 9 small tic-tac-toe boards arranged in one big 3×3 board.
When you play in a square, that square sends the next player to the matching small board.
Example: if you play in the top-right square of any small board, the next player must play in the top-right small board.
Opening rule: on the first move only, the first player cannot choose a square that sends the next player back to that same small board. Those blocked opening squares are shown with a slash.
If a player gets 3 in a row first on a small board, they win that small board. A big X or O appears on it.
Even after a small board is won, the remaining empty squares on that board stay playable.
If a player is sent to a small board that is completely full, they may play anywhere.
The overall winner is the first player to win 3 small boards in a row on the big board.
If all 81 spaces are filled and nobody wins the big board, the game ends in a cat’s game.