🎮 Browser Game
Tic-Tac-Toe vs Computer
Play X vs O against the AI. Can you beat Hard mode?
0
You (X)
0
Draw
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CPU (O)
Your turn — click a cell
How to play
You are X, the computer is O. Take turns placing your mark. Get three in a row (horizontal, vertical, or diagonal) to win. Choose your difficulty — Hard uses the Minimax algorithm and never makes a mistake!
Frequently Asked Questions
How does Hard mode work in Tic-Tac-Toe?
Hard mode uses the Minimax algorithm, which is the mathematically optimal strategy for Tic-Tac-Toe. The AI will never lose — the best you can achieve is a draw.
Can I beat the computer on Hard?
No — on Hard difficulty the computer plays perfectly using Minimax. The best outcome is a draw. Try Easy or Medium if you want a chance to win!
Can I go first or second?
You always play as X and go first. The computer plays as O.
Does this work on mobile?
Yes! Tap any cell to make your move. The game is fully touch-optimized.