2025 MIT Mystery Hunt

My team, Death and Mayhem, organized the 2025 MIT Mystery Hunt. The hunt was a great success. Many people commented that it was the best mystery hunt ever.

This year, we added a new and interesting feature. Not only were teams allowed to choose which puzzles to unlock, but they were also given a short description of each puzzle in addition to its title. So, small teams who liked crosswords could choose to work only on crosswords.

As usual, I will list the mathy puzzles, including our official puzzle descriptions. All the puzzles can be found at the hunt’s All puzzles page.

We had a special round called Stakeout, with easy puzzles. My team isn’t too nerdy, so we didn’t have too many mathematical puzzles overall, and just two puzzles with a math flavor in the Stakeout round, incidentally coauthored by me. Somehow, I like designing easy puzzles. There were two additional puzzles in this round that I enjoyed during testing. I loved the popsicle puzzle so much that I brought it to my grandchildren to solve.

The first round wasn’t too difficult either. Several people praised the ChatGPT puzzle, though it’s not mathy.

  • ChatGPT: A blank textbox with a text entry field below it.

Now, moving to more difficult puzzles, Denis Auroux is famous for designing fantastic logic puzzles. His puzzles below aren’t easy, but many people loved them. I even heard magnificent as praise.

Here are two puzzles I test-solved and enjoyed. The first one is a logic puzzle, while the second one isn’t math-related.

Here are two puzzles that I edited and highly recommend. The first puzzle was initially called Gin and Tonic; I wonder if anyone can guess why.

  • Follow The Rules: An interactive interface with a grid of toggle switches and a grid of lights.
  • Incognito: Cryptic crossword.

These are math-related puzzles that people liked.

I asked only a few people for recommendations. These are math-related puzzles that weren’t mentioned but seem cool. The fourth puzzle was an invitation to the Mystery Hunt, which, not surprisingly, was a puzzle.

I also got a recommendation for a non-math puzzle, which I would definitely have enjoyed watching solved. I’m not sure I’d enjoy solving it alone.

Finally, here is the list of non-math puzzles that seem cool. A warning about the first puzzle: It’s rated R. The first three puzzles are relatively easy; they are from the Stakeout round.

Here is a video from Cracking the Cryptic, joined in this episode by Matt Parker, titled Matt Parker Sets Us A Challenge!. The video is devoted to the second part of the puzzle Maze of Lies, mentioned above, by Denis Auroux and Becca Chang.


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