Show HN: Sufuku – Sudoku, but Numbers Repeat
By matthorse · 2026-10-16 · 2 points · 2 comments
https://crossnum.com/sufuku
Sudoku is short for "the digits must be single". I wondered if inverting this would work: "the digits must be repeated". And so, by swapping "doku" for "fuku", Sufuku was born. In short, instead of using numbers 1-9 for a 9x9 board, you use 2 twice, 3 three times, and 4 four tim…
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