Rainfall
(Published on 20. October 2026, 20:09 by sisaloofafump)
Normal sudoku rules apply.
Thermometers: Digits decrease from tip to bulb.
Unique: Each bulb has a unique number.
Outside numbers: Each number outside the grid is located n cells down the column/row it is next to, where n is the first digit along the column/row. (For example, if the outside digit is 6, and the inside digit it is next to is 3, then the digit 6 in that row is 3 cells away from that edge.)
If anyone knows a better name for the outside number system, let me know! SudokuMaker calls them "numbered rooms" but i dont see that used on this site.
Solution code: Column 9, top to bottom
Comments
on 20. October 2026, 21:36 by damo_89
You would be fine describing this constraint as Numbered Rooms. I parsed the rules and it looked like NR and then the previous comment confirmed so that was good.
on 20. October 2026, 20:39 by gnidan
Nice ruleset. Would like to see a harder version of this!
on 20. October 2026, 20:12 by GorgeousNicko
I think the constraint you describe is, indeed, called Numbered Rooms here. I doubt you would cause significant misunderstandings by using the same terminology.
