Ultimate Tic-Tac-Toe is a more advanced version of the two-player board game Tic-Tac-Toe.

The first player may start in any small board. To win, a player must win on the big board by winning three small boards in a row. Winning on a small board is the same as in regular Tic-Tac-Toe. After a small board is full, no more moves may be made in it. Making a move "sends" the opponent to the corresponding small board, unless that board was already won or full, which allows the next move to be made in any other board.

Time Control

Intermissions last up to 30 seconds, ending early if all players are ready.

Each turn lasts up to 15 seconds by default, with automatic random moves. Unused turn time cannot be carried to future turns. There is only a turn timer, not a game timer.


Turn Time / ms (default: 15000, min: 5000, max: 60000)

A random move will be made after the turn timer expires.

Inverted (switch winning and losing, default: off)

Winners and losers are swapped. Draws and resign/forfeit are unaffected.

Checked (default: off)

This disallows obviously bad moves. If the opponent can win in one move, you are in check. Moves that make you in check or lose are invalid. If you have no moves, you lose by checkmate.

Quick (default: off)

Capture one small board to win (enabling Checked is recommended, to avoid misclicks).