What Is the 'Mother of All Puzzles'?

There is **no single puzzle** universally titled “The Mother of All Puzzles.” It’s a **figurative phrase** used to describe:

• An exceptionally difficult, complex, or famous puzzle (e.g., Riemann Hypothesis in math, P vs NP in CS).
• A specific puzzle *within* a game/book that is the ultimate challenge (e.g., the final puzzle in The Witness, Fez, Myst, Professor Layton).
• A metaphor for a seemingly unsolvable real-world problem.

If you’re referring to a **specific puzzle** (from a game, contest, riddle book, interview question), please provide:

• The source (game title, book, website, company).
• The puzzle’s rules or description.
• Any known name (“The 100 Prisoners,” “The Hardest Logic Puzzle Ever,” “Einstein’s Riddle”).

With details, I can walk you through the solution or strategy.