The objective of this game is to have four stones in a row (horizontally, vertically or diagonally) before the computer.
Stones can be added to the columns by clicking the corresponding button on top, building up from the bottom to the top.
The user starts by placing a red stone to a column of his/her choice. The computer will add a blue stone at a place of its choice in turn.
In 'Intelligent Computer' mode (default), the computer will try to prevent you from winning and actively try to win itself. You can turn this
mode off any time you like before or during the game. Then the computer will add stones randomly and letting the computer win becomes the real challenge.