The other 2 are “just” hidden; perhaps the psetter could shed some light on the reasons why they’ve been hidden for days now. It’s unacceptable to cancel seemingly legitimate and rather difficult problems after dozens of people have already put effort into solving them.
In contrast, the page for ZING02 simply doesn’t exist anymore; this combined with recently broken language links in rankings and complete lack of presence of admins or even EB, makes me wonder whether the entire platform is falling into disrepair. Who can be emailed about this?