Tic Tac Toe
Take turns placing X and O on a nine-square board. Make a line of three before your opponent, play the computer at three difficulty levels, or share the board with a second player on the same device.
Controls
Click or tap an empty square. Use number keys 1-9, or arrow keys with Enter/Space on a focused square. Hint suggests a move; Undo revisits an unfinished round.
How the round works
X moves first. Choose an empty square, then let O take the next turn. The first line of three matching marks wins, whether it runs across a row, down a column or along a diagonal. If all nine squares fill without a winning line, the round ends in a draw. A finished round stays visible until you choose New round.
In Play the computer, you control X and the computer plays O. Easy, Medium and Hard change the computer's decision making. In Two players, both people take turns using the same board and device. This mode does not create an internet room or connect another player's browser.
Controls and useful tools
Click or tap an empty square to place your mark. On a keyboard, the number keys 1–9 correspond to the board positions; focus a square and use the arrow keys to move around the board. Enter or Space activates the focused button. Hint highlights a suggested move rather than playing it for you.
Undo lets you revisit a move during an unfinished round. Use New round to start again. When you replace an active round, the game asks for confirmation and keeps the accumulated score and statistics. Switching mode or difficulty can also replace the current board, so finish or save your position before confirming.
A simple way to plan your next move
Check for a winning square before choosing a position. Then look for a line your opponent could finish on the next turn. The center connects four possible lines, while each corner connects three, but a direct win or block matters more than a general preference for a square. A draw is a normal outcome when both sides avoid leaving an opening.
What stays in this browser
The build saves its round, score and personal computer-game statistics locally. Reloading can restore a valid saved board. These records belong to this browser on ZAROCER; they do not transfer automatically from another domain, another device or a private browsing window. Clearing site data can remove them. The portal's recent-games list is separate from the game's own scores.