Switcheroo
(Published on 20. February 2025, 14:00 by Fenners)
I had this idea of putting a puzzle within a puzzle and having the constraints change during the solve. It made me think, it would be nice if there was a way to set puzzles where lines or constraints could appear/disappear/change when certain digits were entered, kind of like how dynamic fog works. If anyone knows of a way to do this, I'd be all ears! Anyway, enjoy the puzzle.
Puzzle: Switcheroo
Rules:
Normal 9x9 Sudoku rules apply.
The arrows point to the smaller of the two adjacent digits.
At the start, all teal lines act only as region sum lines. When, and only when, ALL circles have a filled in digit, remove all other digits except those in the circles (and the 5 in R5C5) and now all teal lines act only as german whispers lines.
Region sum lines: Digits on the teal line must sum to the same value for each box it enters.
German whispers: Adjacent digits on a teal line must differ by at least 5.
Solution code: Row 2, left to right, no spaces:
Comments
on 21. February 2025, 07:29 by VitP
so cool, it's frozen
on 20. February 2025, 16:21 by Ragna
Witzig :-)
on 20. February 2025, 15:49 by mellowrobinson
Very cool puzzle. I think someone with coding knowledge could do the dynamic lines with a custom constraint in Sudokumaker. That's a guess though, way out of my league. I would also love to see it, though.
My Javascript knowledge is also not good enough! I think if someone could manage to code the dynamic fog triggers to trigger different lines it could be possible. --Fenners
on 20. February 2025, 15:33 by LehanLehan
Try "Inception" by matt383
Interesting, looking at the puzzle, I've actually seen this puzzle solved by Simon on CtC, probably why I had this idea in the back of my head! --Fenners
