Four in a Row

Four in a Row is a game for two players sharing one device. Red and yellow take turns dropping a disc into one of seven columns, where it falls to the lowest free space. The first player to line up four discs horizontally, vertically or diagonally wins.

It is easy to explain and full of traps: the best moves often set up two winning lines at once so your opponent can only block one. Pass the mouse or the phone back and forth and play best of three.

Players alternate turns, starting with red. Drop discs to connect four of your colour in a line. If the board fills up, the round is a draw.