There are only twelve 4x4 sudokus (and a cool trick for finding minimal subsets)
By Fran314 · 2026-09-14 · 2 points · 3 comments
https://baldino.dev/blog/there-are-only-twelve-4x4-sudokus/
By Fran314 · 2 points · 3 comments · on Hacker News, read on BetterNews.
Open the full discussion on BetterNews