Link: Regular expression crossword puzzle

[sonia]

From Rodrigo, @mathsppblog@fosstodon.org, A crossword where all hints are regular expressions!

Regex isn't hard enough, so I present you with a crossword where all hints are regular expressions!

I confess at first it looked like the hints don't contain enough information to solve the puzzle but after some slow but steady progress I can confirm that they do 🤣

The original puzzle is from https://puzzles.mit.edu/2013/coinheist.com/rubik/a_regular_crossword/

I shared this on my blog: https://mathspp.com/blog/problems/regex-crossword

Direct link to the puzzle grid

I printed it out, and it took me a couple of enjoyable hours to solve. I did have to check my understanding of the finer points of regular expressions at https://regex101.com by typing in some of the clue expressions and then trying different values to see if they matched.

Comments

[jesse_the_k]

You get 47 geek gold stars for this one!

(Seems like this would be a good programming test for a job interview)

🌟🌟🌟🌟🌟🌟🌟🌟🌟
🌟🌟🌟🌟🌟🌟🌟🌟
🌟🌟🌟🌟🌟🌟🌟
🌟🌟🌟🌟🌟🌟
🌟🌟🌟🌟🌟
🌟🌟🌟🌟
🌟🌟🌟
🌟🌟
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Do primes always make for nice triangles?

[sonia]

Ooh, lots of shiny stars! :-) It is indeed very geeky.

[silveradept]

That is quite the test, and that it is only part of that year's Mystery Hunt shows just how much the MIT folk enjoy making and solving puzzles.

[sonia]

Good point!

For anyone else who's curious, more info about the 2013 MIT Mystery Hunt. General info at https://puzzles.mit.edu .