The task is to fill the empty cells with the shapes available.
In each vertical and horizontal row, shapes must be different.
Also on the two big diagonals of the square, shapes must be different.
Click and drag the necessary colorfull shape with mouse into cell.
To remove the shape, just click it. Click arrows to select level.
The original puzzle idea uses letters instead of shapes.
It belongs to a great Russian inventor of puzzles, Leonid Mochalov