Ultimate Tic-Tac-Toe — Nine Small Boards

Tic-tac-toe on nine small boards: where you play decides your opponent's board. Play against 3 AI levels or with a friend on one phone. Now on Google Play

Posted Oct 17, 2026

Ultimate Tic-Tac-Toe feature graphic

By Fadongkwon Soft

2 min read

Ultimate Tic-Tac-Toe — Nine Small Boards

Info

Ultimate Tic-Tac-Toe — 9×9 — Tic-tac-toe on nine small boards: where you play inside a small board decides which board your opponent plays in. Play against 3 AI levels or with a friend on one phone. 9 languages.

About the Game

Nine small tic-tac-toe boards sit inside one big board. Get three in a row on a small board to claim it, and claim three small boards in a row on the big board to win.

There is one twist on the classic game: where you play inside a small board decides which small board your opponent must play in next. Every move is both your square and the board you send your opponent to.

How to Play

Play any square of a small board and your opponent must play in the small board in the same position. Play the top-right square and your opponent plays in the top-right small board. The board to play in is marked with a blue border
If that board is already finished (won or full), your opponent may play in any open board. Sending someone to a finished board gives them a free choice, so be careful
Three in a row — across, down or diagonally — claims a small board, which is then covered by a big X or O
Claim three small boards in a row on the big board to win. If no moves remain, it is a draw

New to the game? Start on the classic 3×3 board — an ordinary game of tic-tac-toe is a good way to get a feel for it.

Modes and Difficulty

Vs Computer, 3 levels: Easy is about even for someone who just learned the rules. Normal reliably beats Easy, and Hard thinks about half a second per move and looks well ahead
Choose who moves first: you, the computer, or random
2-Player mode: take turns on one phone

Features

Ultimate 9×9 board or the classic 3×3 board
The board you must play in is highlighted and the rest is dimmed, so you always see where to play
Won boards are covered by a big X or O, and the last move is marked
Undo, and a win/loss/draw record for each board type and difficulty
A how-to-play guide with tips; plays in 9 languages