The big board is made of nine small tic-tac-toe boards. Win three small boards in a row, across, down or diagonally, to win the game.
- Pick a board. Highlighted boards are the ones you may play in. Tap one to zoom in.
- Place your mark in an empty cell. Tap another cell to change your mind, or go back to all boards.
- Confirm the move. The board zooms out.
Where you play decides where your opponent plays. The cell you pick sends them to the matching board: play the top-right cell and they must play in the top-right board.
Get three in a row in a small board to win it. A small board that fills up with no winner counts for nobody.
Classic rules: once a board is won or full it is closed. If you are sent to a closed board, you may play in any open board.
Open boards variant: a won board stays open while it has empty cells, and you must play there if sent to it. Moves there never change who won it. Only a full board gives a free choice.
The game ends in a draw when nobody can complete a line of boards any more.
Keyboard: arrow keys move, Enter selects, Esc goes back to all boards.