Hello, I'm apparently close to the end the 10 first puzzles are solved my golden child is born. Unfortunately I saw in the puzzle hints that a master builder was required for the last puzzle. The fact is that I have nothing more to build on the island thus my builders do not increase their skills and are only adept builders (my last master builder is dead last night I guess). Moreover they are quite old and my new builders generation is unable to learn anything about building (they are always bored and do nothing since they have nothing to build). How then can I solve puzzle 12 ? can the golden boy solve it (if he is still on the island after the puzzle 11 .... it isn't solved yet thus I do not know) ? I would be quite disapointed to be stucked at the last puzzle simply because I can not learn anymore a required skill.... other question I reached all level 3s and my research staff does not research anymore is it normal ?