I tried numerous times now, but never was able to complete a single game. I'll alwas get stuck at some point, without any more clues on what number/egg goes where. It is utterly frustrating, as I would often have several rows with only 2 numbers missing, but no way of exclusing any one of the two possibilities. I have no idea how this was made, but it is simply impossible to solve

All roodokus I've done so far have been solvable, but yeah as bgyoshi said, some of them are more difficult than others. There is likely an algorithm that only creates solvable puzzles but it's also sort of random at the same time so it's easy to get unlucky with a more difficult one

I think you just got a harder one at that time. The fastest time I ever had, was 1 hour! and I even reset many-many time before I could finish that.

But the one problem that I encountered was that even though I finished it more than 1 hour, it seems that I didn't get any coins. Even though the games said that I get 100 PixCoin for finishing the game > 20 mins. But until now, I still don't get the 100 PixCoin reward yet.

Also to mention, the game logs you off after a couple of minutes automatically. If you are logged off after you solved the puzzle you will not get your PC reward. If your time is 20+ minutes remember to open new tabs so the site thinks you're active.

I posted it in the Discord but here again for those who are not on there

This is an example of a logjam (or at least that's what I think they are referred to as by pro-sudoku players):

It's entirely possible to solve them...if you know the logic trick...
I didn't bother learning them so I don't know how to solve it (SOLVE it not GUESS it, you could guess it but then it wouldn't be a puzzle anymore, that defeats the purpose)
Look up sudoku tips and tricks or how to solve logjam sudoku if you want to learn it.


Edit: Also...this is why I doubt people when they say they don't need annotation to solve sudokus...you literally need annotations to solve logjams...unless you can visualize annotations in your head which is more believable for me

It's even easier to just re-roll the grid until you get an easily solved one, if you're going for time :)

But yes, having annotations is a must!