hacker.org

One of the best challenges, even tricky for an experienced PC COBOL programmer...

Don't stick to the name too much

As MerickOWA stated a year ago, the colors have no meaning in this challenge.

This answer ought to be much higher - e.g. a single bead on a row can be in one of three states (left, middle, right), two beads have seven states I think (both left, both together in the middle, both right, and four variations with a gap between the two beads), ... This would lead much too far - i...

Anyway, what is the connection between this challenge and the old Eniac?

This is just a joke, as the abacus shown in this challenge is almost as "new" and almost as powerful as good old Eniac But since many people are misleaded by this name it serves another purpose, too

I don't know what I am missing here - despite grabbing the contents of this site every 30 seconds since a few days (!), there is always the same content... I'm starting to feel like a noob regardless the nearly 90 challenges I solved...