Tic-tac-toe
A quick, classic 3×3 game. You go first as X. The computer plays an optimal O (perfect play from both sides is always a draw—see if you can hold the line).
Your turn. You are X, computer is O.
How it works
- Tap a square to place X.
- The computer answers right after you.
- Use New game any time to reset the board.
Note: This tool is for general information only, not professional advice. Full disclaimer
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