Tic-Tac-Toe

Tap a square to place your X · Keyboard: number keys 1–9 match the number pad

Won: 0
Lost: 0
Drawn: 0

Computer strength

Who starts

Turn: You

The prompt

Make Tic-Tac-Toe in one HTML file, player against computer. Easy plays mostly at random, Medium sometimes takes the obvious win or block, Hard uses full minimax search so it never loses. Highlight the winning line, let the player choose who goes first, and keep a win/loss/draw record on the device.

Claude wrote this game from a short brief like this one. It was then played, tested on phones and tuned before it went up here.

How to play

Take turns placing marks. You are X, the computer is O.
Three in a row, column or diagonal wins.
On Hard the computer plays perfectly, so the best you can do is a draw.

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