Ugh, I think the building skill is the required one, too. I have the last two puzzles left to solve and my villagers haven't moved the boulder. I'm assuming that moving the boulder is one of the remaining puzzles. I have a few people who have OK construction skills (middle of the road) but that's it. I have 65 villagers and the golden child no other way to get someone skilled on construction. Can someone tell me if I just need to start over?