My interpretation mirrors the clue gimmick and if i was sending in my entry (not that I will) I would be carrying out the guidance by affecting or 'involving' only 10 cells.
I can see how the obvious interpretation works but I'm not happy with the fact that many more than 10 cells would be affected/involved.
I wouldn't want to influence anyone who submits an entry - I don't have anything at stake here, so it's easy for me to go with a hunch (but I think this is a badly worded preamble if the obvious interpretation is correct).