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.