[matthberg]

I'm surprised nobody's mentioned the Regex Crossword game site [0], it's shown up on HN several times [1][2] and has a fantastic user-submitted puzzle section (that includes the MIT Mystery Hunt puzzle [3]) and a puzzle builder.

0: https://regexcrossword.com/

1: https://news.ycombinator.com/from?site=regexcrossword.com

2: Most discussed posting: https://news.ycombinator.com/item?id=8674039

3: https://regexcrossword.com/playerpuzzles/8cbea27f-c4c5-4d11-...

[e40]

Got really frustrated with the ui on mobile.

[jonny_eh]

> I'm surprised nobody's mentioned

There's a lot of these. An embarrassment of riches!