How do you win 4x4 Tic Tac Toe?

Winning depends on the active rules. In the standard 4-in-a-row rule, you win by aligning four of your marks horizontally, vertically, or diagonally. In the 3-in-a-row variation, you win by aligning three of your marks in a line on the 4x4 grid.

Is 4x4 Tic Tac Toe solved?

Yes, 4x4 Tic Tac Toe is a solved game. Under the standard rules (4-in-a-row to win), if both players play perfectly, the game will always end in a draw. However, if using the 3-in-a-row rule on a 4x4 grid, the first player has a forced winning strategy.

4×4 Grid Mode

4x4 Tic Tac Toe Online

Challenge the computer AI or play local pass-and-play with a friend. Choose between 3-in-a-row or 4-in-a-row rules!

Interactive AI Synth Sound Effects Two Rule Variations

Game Setup

Opponent

Winning Condition

Sound Effects

Player X

Draws

AI (O)

Your Turn (X)

4x4 Tic Tac Toe — Play Online Free & Rules Guide

How to Play 4x4 Tic Tac Toe

4x4 Tic Tac Toe is an exciting grid expansion of the classic 3x3 game. While the basic mechanics are identical — players alternate turns placing their marks (X or O) on an empty grid square — the larger dimension adds a layer of tactical depth and double-threat strategy.

The Two Official Rulesets

4-in-a-Row (Standard): The objective is to align four of your marks in a straight horizontal, vertical, or diagonal row. Because a 4x4 board has 16 squares, it requires comprehensive blocking. In this mode, perfect play from both players guarantees a draw.
3-in-a-Row (Variant): The goal is to align three marks. With a 4x4 board, this makes the game incredibly fast-paced, and it offers the first player (X) a forced winning sequence if played optimally.

Winning Strategies for the 4×4 Grid

Because the board is larger, edge squares and corners have different values compared to the traditional game:

Control the Inner Squares: Unlike the 3x3 game which has one center square, the 4x4 board has four "inner" squares. Controlling these squares gives you paths to multiple diagonals and shortens your lines.
Watch for Double-Threats (Forks): With more space, it is easier to setup two overlapping rows of 3 marks. Block your opponent before they place their third mark in any line!

Is 4x4 Tic Tac Toe a Solved Game?

Yes. Like the 3x3 version, 4x4 Tic Tac Toe is mathematically solved. When playing with the standard 4-in-a-row victory condition, the game results in a draw with perfect play.

Frequently Asked Questions

Is there a forced win in 4x4 Tic Tac Toe?

In standard 4-in-a-row, no. Optimal play leads to a draw. However, if you play with the 3-in-a-row rule on a 4x4 grid, the first player (X) can force a win.

How many winning combinations are there?

On a 4x4 grid, there are 10 possible winning lines for 4-in-a-row: 4 horizontal rows, 4 vertical columns, and 2 diagonals.

Can I play 4x4 Tic Tac Toe offline?

Yes! Our AI and local 2-Player modes are written entirely in client-side Javascript. Once the page is loaded, you can bookmark it and play it offline anytime.

Want a Bigger Challenge?

Try Ultimate Tic Tac Toe — the advanced 9-grid version where every move dictates where your opponent can play next!

Play Ultimate Mode Play Online with Friends