Strait-Crossing Puzzle

Question

You are on an island, and must transport 3 moose across a strait to the mainland. While they can swim across the strait, they will likely end up running into the forest and leaving you behind. While you have a boat, it would be dangerous to try and transport multiple moose. The moose will be calm if they are all together, alone, or swimming, but will become violent if 2 are left together. A lone orca, seeing your plight, has come to help you by guiding a moose across the strait. However, the orca likely just wants to eat the moose, and so you don't want to let them be alone with the moose. So, what is the smallest number of crossings required to bring the moose to the mainland?

Karsten Köpnick · Answer

First, I

Then I

Now I

So then

This is minimum because

Nitpicky as I am, I'd like to point out that just sticking to the question, I think the minimum number is actually

This seemed far too easy. And since nobody else solved it, I probably missed something. However, I couldn't find where this solution contradicts the conditions.

Strait-Crossing Puzzle

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