What helped me, is not to view the problem as an image of boxes placed in staggered manner, but rather sequnce of numbers. Then it is easier to see the solution (Dont overly complicate the solution, because it is much easier than what it seems)

I have been working on some 7 kyu katas (which definetly are not supposed to be 7 kyu), and I dont know why but this one is so much more easier. I did it literally in minutes