Tic-Tac-Toe
Beat an unbeatable AI (or settle for a draw).
Your move (X)
Runs entirely in your browser — no signup, and your scores stay on your device.
About this game
Get three of your marks in a row — across, down, or diagonally — before the computer does. On its hardest setting the AI uses the minimax algorithm to play optimally, so the best you can force is a draw; easier settings play less than perfectly so you can win. You can also pick who goes first.
Strategy
Open in the centre — it's part of four different winning lines. Then look for a 'fork': a move that makes two threats at once, which your opponent can't block both of. On Hard the AI plays perfectly, so a flawless game ends in a draw; drop to Easy for real winning chances.
How to play
- 1Pick a difficulty and who moves first.
- 2Click an empty square to place your mark.
- 3The computer responds immediately.
- 4Line up three in a row to win — or hold the AI to a draw.
Controls
- Click / TapPlace your mark
- New gameReset the board
Features
- Minimax AI that never loses on Hard — the best you can force is a draw.
- Three difficulty levels, from beatable to flawless.
- Pick who moves first; keeps a running win/draw/loss tally.
Frequently asked questions
Can I beat the Hard AI?
No — on Hard the computer plays a mathematically perfect game (minimax), so a flawless game by you ends in a draw. Drop the difficulty to open up winning chances.