Kind request; Can you please make a final decision if you want to leave the puzzle published yes or no? If not, can you please explain which steps I can take, to make it unpublished asap due to copyright? Who do I contact? I read this article; is that the way to go? https://meta.stackoverflow.com/questions/387746/instructions-for-reporting-copyright-infringement-have-accidentally-been-remov.
I just asked my colleagues and they think it should be removed