The “hydra” we’re coping with is a metapuzzle: We have now to discover a method to make use of the options from different puzzles that we’ve already solved to extract yet another reply. If we resolve this one, we’ll be rewarded with extra puzzles.
We all know we have to diagram the solutions for this spherical of puzzles as a binary tree. In step with the hydra metapuzzle’s mythological analogue, each time we resolve one puzzle, two extra department off till we’ve a diagram 5 ranges deep. We’re nonetheless lacking solutions from a number of unsolved puzzles that may assist us determine how the diagram works and tips on how to extract a solution to the metapuzzle. The diagram we’ve drawn, in inexperienced chalk, will get extra chaotic with each addition, erasure, and annotation we squeeze onto the overcrowded chalkboard. However we will sense that we’re only one “aha!” away from an answer.
MIT’s Thriller Hunt has been difficult puzzle fanatics yearly since Brad Schaefer ’78, PhD ’83, wrote 12 “subclues” on a single sheet of paper as a problem for buddies throughout Impartial Actions Interval (IAP) in 1981. The solutions led solvers to an Indian Head penny he had hidden on campus. As we speak’s Hunts are nonetheless constructed round that primary idea, however what constitutes a problem has modified over 4 a long time. One of many clues from the unique 1981 Hunt is only a lacking phrase in a quote: “He that performs the king shall be _____; his majesty shall have tribute of me.” It’s straightforward to unravel as we speak with Google, however in 1981, even in the event you knew it was Shakespeare, in the event you didn’t discover the refined trace that it’s best to search for a personality referring to a play inside the play, it might need taken a number of hours of skimming the Bard’s collected works to search out the reply.
We add a number of extra options to the hydra diagram over the subsequent few hours. Ultimately somebody notices that every one the solutions within the fifth degree of the diagram appear to have an odd prevalence of Ls and Rs. That is the “aha!” second: They inform us tips on how to navigate the binary tree. From the primary node on the prime of the tree, we observe the Ls and Rs within the order they seem in every of the 16 options on the fifth degree. Take the left department, then proper, then left once more, touchdown on a phrase that begins with H. The second fifth-level reply leads us to a phrase that begins with E. Repeating the method with all 16 solutions spells out an apt option to take care of a hydra: “HEADTOHEADBATTLE.” (Puzzle options are historically written in all caps with no areas or punctuation.) These of us who’ve been tackling the puzzle take a second to get pleasure from our victory earlier than splitting as much as discover new puzzles to work on.
Some components of the Thriller Hunt are arduous to explain, the type of must-be-seen ingenuity that additionally evokes hacks on the Nice Dome and any variety of above-and-beyond engineering initiatives showcased round campus yearly. Many of the puzzles are totally distinctive, though they do usually incorporate logic and phrase issues in addition to extra mainstream components like crosswords, sudoku, and Wordle. However virtually something could be was a puzzle. For instance, chess puzzles is perhaps mixed with the cardboard sport Magic: The Gathering. Or solvers may very well be requested to prepare a Git repository with 10,000 out-of-order commits (that’s, discover the right sequence of 10,000 modifications to a file because it was tracked in a model management system), determine duets from musicals, or draw on their information of popular culture trivia.
For many of its historical past, the Thriller Hunt had little official standing on campus. By custom as a lot as any organizational effort, groups merely confirmed up in Foyer 7 on the Friday earlier than the Martin Luther King Jr. vacation for the kickoff. In 2014, the MIT Puzzle Membership was fashioned to assist present year-to-year continuity and different help, resembling securing rooms for groups to work in and reserving Kresge Auditorium for the opening ceremonies. Puzzle Membership additionally hosts different occasions, resembling mini puzzle hunts and sudoku and logic puzzle competitions—which Becca Chang ’26, the membership’s present president, says “has helped rather a lot with outreach to new college students or anybody who is perhaps keen on [puzzles].”
Know-how has enabled the Thriller Hunt to develop and evolve in important methods, and never simply by way of the sorts of puzzles which are attainable. By means of the mid-Nineties, a single particular person might tackle the accountability of writing and working the occasion. As we speak it’s a yearlong dedication for the profitable crew to design the subsequent 12 months’s Hunt. Doing so requires managing artistic output and technological infrastructure that rival these of a small enterprise. Duties embrace spending 1000’s of hours writing and testing puzzles, setting up bodily puzzles and props, and constructing a dynamic web site that may face up to the massive inflow of puzzle-hungry guests.
Simply organizing a crew of solvers could be a main enterprise, particularly now that increasingly more contributors are becoming a member of remotely. Anjali Tripathi ’09, who began the crew I’m Not a Planet Both in 2015, acquired her introduction to puzzle hunts by a miniature Thriller Hunt that Simmons Corridor runs for first-years. After tackling the primary occasion with the Simmons crew on campus as an undergrad, she participated remotely for the primary time in 2010. “I used to be overseas in England and nonetheless wished to do Hunt, and I keep in mind how arduous that was,” she says. The crew “had no infrastructure for it.”