Arrange the four pieces into the 2x2 square so that four squares formed of the white dots appear. A square is formed when four dots lie in its respective corners (as shown in the top illustration).

In the initial position (bottom illustration) the 2x2 square already consists of two dot squares.



To exchange pieces first highlight one of them (by clicking) and then click the piece which you want to exchange it with.

To rotate a piece, first highlight it and then use the arrow buttons.

Use the Restart button to return to the initial position.