Connect Four
Drop discs and line up four in a row against the computer or a friend.
You (red) to move.
How to play
- Drop discs into columns; they fall to the lowest empty space. Keyboard: Tab to any cell and press Enter to drop in its column.
- Connect four in a row — horizontally, vertically or diagonally — to win.
- Easy takes wins it sees but otherwise plays loosely. Hard always wins or blocks one move ahead. Extreme searches 6 moves ahead with alpha-beta pruning. Nightmare searches up to 10 moves ahead within a short time budget. Changing level starts a new game.
- Untick 'Play against computer' for two players on one device.