One of the things I wished I understand a whole lot better is the regex rules. While I can hack an already existing rule to adapt it for my own needs, I can’t start one from scratch. To be fair, I don’t think I can adapt one if my need is more complicated.
Recently I’ve discovered Regex Crossword and I’m having fun with it. I test myself from time to time, when I get bored. Who knows, maybe something will actually stick.
Here’s what they say on their About page:
Regex Crossword is a crossword puzzle game, where the crossword clues are defined using regular expressions. The site is created and maintained by Maria Hagsten Michelsenand Ole Bjørn Michelsen. Everybody can play and it is a great way for newcomers to learn regular expressions and for experts to practice their skills.