I stumbled across a nice puzzle today. It had a picture and only mentioned that there is a missing grid from it. (I already tried a reverse search of the image)
I spend some time on it, and I think I found a solution. After posting my answer I left the office and headed home. When I arrived, I wanted to check if there was an update on the question only to find that it's gone.
I am very confused about why would someone do that. I understood that there is a privilege that allows users to see deleted question. Here is the link to the question.
I was really interested if my solution was the right one.