Forbidden Symbol
(Published on 25. July 2024, 13:03 by vitaminz)
This puzzle was originally constructed as a "zoomed in" puzzle, where you only see a 7x7 grid. In the end, I decided that the end was a bit too tricky, so I turned it into a version with the outer cells visible. However, if you would like to try the original version, you can do so here. It has some nice moments that are less impactful in the big grid in my opinion.
RULES:
There is a standard 9x9 sudoku grid somewhere in the larger grid inside which normal sudoku rules apply. No digits appear outside the 9x9 grid.
German Whispers - Adjacent Digits on a (thicker, solid) green line must differ by at least 5.
Anti-Kropki - No two digits on a single (dashed, thinner) red line may be either consecutive or in a 1:2 ratio.
Solution code: The digits in column 7 of the 9x9 sudoku (9 digits)
Comments
on 19. August 2024, 15:17 by sorryimLate
It was fun and interesting trying to figure this out with the small grid, but in the end I gave up and visited the large grid for a few minutes to do some visualisation. The deductions necessary were totally fair, but it's so hard to spot them without having had some practice with this kind of solving. Great challenge anyway! I would imagine that solving the large grid is quite approachable. Thanks for sharing!
on 25. July 2024, 20:31 by SamuPiano
I did the 7x7 version of this puzzle and it certainly threw me for a loop in the best way possible. Unwinding this one was incredibly fun, and every deduction felt hard-earned but rewarding!
on 25. July 2024, 18:44 by PierreTombal
Not real hard. Locating the 9x9 is actually fairly easy. I found the "anti-kropki" rule confusing as a kropki can normally only exist between neighbouring cells and so I initially interpreted the rule as such rather than as a variation of nabner.
on 25. July 2024, 14:31 by vitaminz
Fixed solution check
