Play Tic Tac Toe online on larger boards. Connect four on 5×5 or 7×7, or five on 9×9, in quick matches or a private room with a friend.

How to play

Take turns placing a mark on an empty square. On 5×5 and 7×7 boards, make a line of four; on 9×9, make a line of five. Horizontal, vertical and diagonal lines count. Choose a quick match or create a private room. Watch the turn timer while building your line and blocking your opponent.

A useful starting tip

Look for a move that creates two threats at once. These larger boards reward checking more than the squares next to your last mark.

More room for lines and threats

This Tic Tac Toe uses expanded boards. Instead of a short familiar 3×3 game, you monitor several directions and distant areas. On 5×5 and 7×7 the target is four consecutive marks; on 9×9 it is five. That length changes both attack plans and the moment when defence can no longer wait.

Quick matchmaking finds an opponent, while a private invitation selects a particular person. Agree on board size and check whose turn it is. More space does not change the basic condition: a winning line must be continuous and contain only your marks.

Check the nearest finish first

Look for your own immediate win. If none exists, identify the opponent's immediate winning cells before developing your lines. Two intersecting preparations do not always create a double threat: if both need the same empty cell, one defensive mark stops them together. Inspect the actual finishing points and scan both diagonals rather than relying on the visual impression of a fork.

Count the finishing squares

A row with several marks is only dangerous when it has a real empty square that completes it. Check your own finish, then the opponent's, every turn. On larger boards a threat can sit far from the last move, so scan the whole row and both diagonals rather than staring at one corner.