We have tried the same times the most difficult variant. Here are located on each island field two numbers and three islanders make computing tasks. Unfortunately it does not help to know the right answer. One must also randomly (~ dice) land on the right field while it happened to you that a number of laps, no one lands on one of up to three fields and then it's pretty boring (especially when the "random" in pencil then again only 4-rolls).
Another negative point is that you can not cancel the explanations and we must listen to the whole story again every time when the game starts.
Pity about the nice idea.