This type of satin stich is used to cover a larger area of pattern. This allows smaller and tighter satin stitches to be used instead of long and sagy ones. The pattern is broken up into smaller horizontal or vertical sections. Then, each section, at a time, is covered with satin stitch. The important thing to remember is that the satin stitch in the next row will always begin from between the two stitches from the previous row. This kind of stitch can be used wonderully with threads of different shades.
You need to know the satin stitch to be able to do this stitch. I will work on a leaf pattern.