Four in a Row

Tap a column to drop a disc · Keyboard: keys 1–7

Won: 0
Lost: 0
Drawn: 0
Turn: You

Computer strength

Who starts

The prompt

Make a connect-four game in one HTML file: a 7-column, 6-row grid where discs fall to the lowest free slot. Player against computer with negamax and alpha-beta pruning, searching 4 moves ahead on Medium and 7 on Hard, scoring every window of four cells. Animate the drop, highlight the winning four, and keep a record.

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

Tap a column to drop your yellow disc into it.
Four of your discs in a row, across, down or diagonally, wins.
Block the computer's red lines before they reach four.

More like this

Four in a Row.