Open Lock

metaphor…! lol

Although I tend to go for Untying the Gordian Knot ones. And pirates.

The problem of untying the Gordian knot resisted all attempted solutions until the year 333 B.C., when Alexander the Great — not known for his lack of ambition when it came to ruling Asia — cut through it with a sword. “Cheat!” you might cry. And although you might have been unwise to have pointed it out in Alexander’s presence, his method did seem to go against the spirit of the problem. Surely, the challenge was to solve the puzzle solely by manipulating the knot, not by cutting it.

Kind of interesting article at that link (it was just a quick random google result). Math-y as it is.  And… weird… note the publish date: Sept 2001. hmmmm.