I believe column E is under-constrained; a solution with column E = "YYYY " or "... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		timdierks on July 6, 2017 \| parent \| context \| favorite \| on: Regex Puzzle I believe column E is under-constrained; a solution with column E = "YYYY " or "OOOO " passes the tests, but is clearly not what's intended.

timdierks on July 6, 2017 | [–]

Never mind, this was an error in the https://regexcrossword.com/playerpuzzles/595e5542d2433 version, which has a (.) where it should have a \1 in row 2 (thanks to @angry_albatross).

angry_albatross on July 6, 2017 | [–]

In the expression in the second row, the 5th character must match the 12th character, which must be R.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact