Brain Soccer is a turn-based strategy game for two players.
Your objective is to kick the ball into your opponent's goal by drawing lines from one of the junctions of thin lines on the board to another, either horizontally, vertically or diagonally.
You cannot move across lines that have already been drawn during the game.
If you draw line to a point which has not been crossed before your turn is over.
If you draw line to a point which has already been crossed before or a point that is part of the border line or the line in the middle of the board, you can bounce from it and continue to draw the lines.
A valid move must end either in a goal or at a point which has not been crossed before. If you cannot make a valid move than you loose a point. The same happens when you block yourself by drawing a line to a point which you cannot exit.