By Noyon Rahman · Updated August 2026 · Reviewed for accuracy against the live game

About Tic-Tac-Toe

Tic-Tac-Toe is the first strategy game most of us ever learned, scratched into school desks long before anyone put it on a screen. Two players take turns marking X and O on a 3x3 grid, racing to claim three squares in a row. The rules vanish in ten seconds, yet the psychology never quite does: wins, losses, and the eternal draw all hinge on a handful of opening moves. This Zapludo version dresses the old favourite in animated marks that pop into the grid and tracks X wins, O wins, and draws on a scoreboard. Its headline feature is the unbeatable AI: on Hard, the computer plays perfect minimax, so you cannot win, only force a draw and claim the moral victory.

How to Play Tic-Tac-Toe

Choose vs AI to play the computer or vs Friend to share the keyboard with a local player. You are X and always move first; in friend mode, X is player one and O is player two. Click any empty square to place your mark and the animated symbol draws itself into the cell. Play continues until someone lines up three marks in a row, horizontally, vertically, or diagonally, or the grid fills for a draw. The AI pauses to think before answering: Easy moves randomly, Medium grabs wins and blocks yours, and Hard plays perfect minimax, so the best result you can reach is a draw. Scores accumulate across rounds until you reset them from the scoreboard.

Tips & Strategies

Open in a corner: if your opponent does not take the centre, a corner start gives you the most paths to a win.
Take the centre square whenever it is free, because it belongs to four of the eight winning lines.
When you hold two corners on the same diagonal, threaten both ends of it; your opponent can block only one.
Against a strong player, play for the draw instead of forcing a loss, since a perfect opponent is unbeatable.
Answer their threats before building your own: one square that stops them beats two towards a win that never lands.

Frequently Asked Questions

Can the Hard AI actually be beaten?

No. Hard mode plays a perfect minimax strategy, so with best play the AI never loses, and your realistic goal is a draw. The same logic guarantees you can never lose either, as long as you answer the AI's opening correctly.

How is the scoreboard kept?

The board tracks X wins, O wins, and draws for the current session and updates after every round, highlighting the latest winner beside the counter. A Reset Scores button zeroes all three totals whenever you want a fresh tally.

What is the difference between the three difficulties?

Easy picks a random empty square, Medium takes a winning move when it has one and otherwise blocks your threats, and Hard uses a full minimax search to play perfectly. Easy and Medium can be beaten; Hard is a puzzle in its own right.

This game is part of the free collection at Zapludo — play more free online games instantly in your browser, no downloads required.

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