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# Ultimate Noughts and Crosses game
- URL: https://www.esheets.io/ultimate-noughts-and-crosses/
- Published: 2025-05-22T23:19:47.000Z
- Updated: 2026-07-19T15:18:10.000Z
- Author: Richard Linnington
- Tags: Maths, Battles

Or is that tic tac toe? Whatever you call it, you'd probably prefer to just get started. But the [rules are at the bottom](#the-rules) of the page if you really want to know.

Player X's turn

Reset Game 

[Play Ultimate Tic Tac Toe over the internet](https://battles.esheets.io/?ref=esheets.io)

## The rules

Imagine a game of Tic-Tac-Toe, but with a mind-bending twist. Instead of one board, you're playing on a large Tic-Tac-Toe board where each of its nine squares contains a smaller, complete Tic-Tac-Toe board (we'll call these "mini-boards").

### The Goal:

Just like regular Tic-Tac-Toe, you want to get three in a row. But here, you're trying to win three mini-boards in a row (horizontally, vertically, or diagonally) on the large board.

### How to Play - The Key Differences:

**The First Move:** The first player (X) can place their mark in any square on any of the nine mini-boards.

**Where You Play Next (This is the "Ultimate" part!):**

After the first move, where your opponent plays is dictated by your previous move.

Whichever square you choose within a mini-board determines which mini-board your opponent must play in next.

For example:

If you place your X in the top-left square of a mini-board...

...your opponent must then place their O in the top-left mini-board on the large grid.

If you play in the center square of a mini-board, they play in the center mini-board, and so on.

**Winning a Mini-Board:**

Within each mini-board, the rules are standard Tic-Tac-Toe. Get three of your marks in a row to win that mini-board.

When you win a mini-board, you "claim" that corresponding square on the large board with your mark (a large X or O will usually appear over it). That mini-board is now closed and cannot be played in further.

**What if a Mini-Board is Already Won or Tied?**

If your opponent's move sends you to a mini-board that has already been won (by you or them) or is tied, good news! You get a "free" move.

This means you can choose to play in any other mini-board that is not yet won or tied.

**Tied Mini-Boards:** If a mini-board fills up and no one has three in a row, that mini-board is a tie. It's marked as such, and neither player can win it. It still acts as a square on the large board; if you're sent there, you get a free move.

**Winning the Game:** The first player to win three mini-boards in a row (horizontally, vertically, or diagonally) on the large board wins the entire game!

**Strategy Tip:** You're not just trying to win the current mini-board you're playing in. You also need to think about which mini-board your move will send your opponent to. Can you send them to a board where you have an advantage, or perhaps to one that's already full to gain a free move yourself?

It sounds more complex than it is – once you play a few turns, the "sending" mechanic will click. Have fun!