To celebrate all those academics out there (this is Oxford, after all), today, we’re sharing a festive version of a classical intelligence problem. It’s more fun if you can act out the problem, e.g. if everyone takes on a role to solve it.

Three elves and three reindeers must cross the Pacific Ocean using a sleigh which can carry at most two people, under the constraint that, for both sides of the Pacific Ocean, if there are elves present on one
coast, they cannot be outnumbered by reindeer (if they were, the reindeer would be too naughty to control). The sleigh cannot cross the ocean by itself with nobody on board.