I created this puzzle. If Surgery is coded as:


Fibonacci as :


Paperfolding as:


Rudin-Shapiro as:


Twin Towers as:

Twin Towers

And Blacksmith is coded as:


How will Parachute be coded?

Hint 1:

The one you use to answer the questions in this site.

Hint 2:

An Unfamiliar one.

Hint 3:

The images are subjected to scale. Writing the amplitudes down may help.

Hint 4:


Hint 5:

Don't edit this post to correct the mistakes that seem obvious. (Yes, this is also a hint.)

Keep a keen mind on the hints.

  • 1
    $\begingroup$ possibly a rot13-encoded comment (not sure about its usefulness though): vf vg vagraqrq gung nyy rapbqvatf fgneg jvgu gur fnzr cnggrea? Va rvgure pnfr, V fhfcrpg gung n yvar gung funecyl tbrf qbja ercerfragf n fcnpr, naq gung rnpu arkg vzntr vf gur rapbqvat bs gur pheerag zrffntr naq nyy cerivbhf barf, frcnengrq ol fcnprf. $\endgroup$ Jun 8, 2020 at 3:33
  • 5
    $\begingroup$ It looks like each encoded word rot13(pbagnvaf nyy gur cerivbhf barf)... $\endgroup$
    – Jafe
    Jun 8, 2020 at 5:36
  • 4
    $\begingroup$ @johnbrookfields I think the link to your other puzzle is unnecessary: if anyone is interested they can use the search engine of PSE. Besides, you should link a page with the search results (like this one) that updates automatically every time you post a new question so that you don't have to manually update the google docs --and we won't have to open the google doc. $\endgroup$
    – melfnt
    Jun 8, 2020 at 8:41
  • 2
    $\begingroup$ What's this? The entire puzzle suddenly changed? That's not how this site is supposed to work. $\endgroup$
    – Bass
    Jun 8, 2020 at 10:10
  • 4
    $\begingroup$ I think the letter P was not encoded in the original, but I don't think I'm going to redo my answer. Nowadays, when I post a puzzle, I usually type it in, sleep on it, and reread it in the morning: that way I can catch most (not all) of the mistakes I made before they are published. There's never any hurry to post a question, the site isn't going anywhere. $\endgroup$
    – Bass
    Jun 8, 2020 at 10:26

1 Answer 1


Partial answer

Two realizations:

first, as jafe has observed similarly, each graph represents a continuation of the previous one, as shown below:

enter image description here

Second, as inspired by monicareinstate's comment: there actually is an inherent pattern in each progression. It turns out

Each individual letter has a unique height. If we match each twist in the graph to each letter (ignoring spaces and hyphens), we have this graph (here I used a horizontally stretched version of "Fibonacci"):

table of progression

This is apparent from

the same heights of the two consecutive "c"s in Fibbonaci, two capital "T"s in Twin Towers, etc. Note that uppercase letters have a different height than that of lowercase letters.

Final thoughts

It seems intentional that "e" and "r" in "Twin Towers" overlap (their heights are very similar) because otherwise each other letter matches previously established heights perfectly. Hint 1 and 2 are still a mystery and I doubt "visual" is the only tag applicable to this question; it does not seem there is convenient way to produce the code even though it is clear what it should look like (every letter in "parachute" has a precedent already given). But I am confident somebody will figure it out :).

  • $\begingroup$ Nice thought @A.O. But hyphens and spaces are NOT NEGLECTED. But I really appreciate your effort. $\endgroup$ Jun 25, 2020 at 14:55
  • $\begingroup$ And, try to find how the hints relate to the question @A.O. And there is a relation to the height. That's why this image is to scale. $\endgroup$ Jun 25, 2020 at 14:57

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.