SquareCTF review

Just plain awful. Some challenges were guessy af, and that by itself would make the CTF bad, but that's not all: some challenges were excessively difficult. Not difficult in a good way, like Hack.lu CTF (https://ctftime.org/event/1142), but difficult in a way that, when you've got the flag, you haven't learned anything; it's just difficult to make you feel frustrated. I won't participate in this CTF ever again, and you shouldn't too.

EDIT: The first two crypto challenges were not crypto at all, I haven't had the chance to look at the third. There were no mathematics, thus they are not real crypto. Not even slightly bad implementations of crypto functions that you have to exploit (such as not checking the points in an EC), the second crypto challenge was directly implemented in a totally unrealistic way, and its exploit was intentionally painful to execute; not hard, just frustrating.

EDIT 2: As mentioned by some other reviews, some challenges were unsolvable and the organizers had to patch them. One of this fails made me lose a bunch of time: there was an 8 that was supposed to be a 9, and I had an old version of the challenge. Of course, no notifications in the platform to let you know.