This was an attempt at a single bonder waste 2 formation. Because a catalyst atom pair can only support 5 products before being either double gold or double lead at the wrong point, you will need to take another catalyst atom, resulting in you having to juggle around 3 pairs of atoms. The thing that makes this unable to work is that you can’t push the atom past the bonder so that you can use the bonder as free space. I’m guessing the winner bypassed that.