After five attempts and 118 Isola years, I've finally finished all the puzzles. Whew!
I did it with help from the Guides and forums for some of the puzzles. And I'm just not sure if I could have done it alone.

So I ask: How many of the puzzles required Guide/forum help for you? And which puzzles were they?

My report --
I couldn't figure out the statue steps on my own. I tried all sorts of things but just couldn't get that someone needed to erect the scaffolding and then the chief needed to get involved for it to work.
I didn't figure out the two puzzles that require potions (sharks and the door key.) I figured that getting rid of the sharks would require a potion but didn't get the recipe without help. The pink door key solution completely eluded me. But I'm not very patient in trying potion combinations (my patience was also tested in the stew requirements in VV2) so that could be just me.

And you? Did you go solo all the way?