✚ Whisper-me-Sum-thing Loop ✚
(Published on 9. December 2023, 07:15 by ElChiglia)
---- RULES ----
Normal Sudoku rules apply: Fill the grid with digits 1 to 9 appearing once each in every row, column, and 3x3 box.
Whispering Loop: Draw a single 1-cell-wide loop of orthogonally connected cells into the grid. Different loop segments cannot touch, not even diagonally. The loop acts as a German Whispers line, i.e., adjacent digits along the loop must differ by at least 5.
Outside clues: Values outside of the grid indicate the total sum of all digits on the loop in that column or row.
Kropki dots: Cells connected by a white dot contain consecutive digits. Digits in cells connected by a black dot are in a 1:2 ratio.
---- LINKS ----
Solve this puzzle in the CtC app
Solve this puzzle on f-puzzles.com
---- EXAMPLE ----
Solve this example in the CtC app
Solve this example on f-puzzles.com
Note: in the 6x6 example, adjacent digits along the loop differ by at least 3.
This Sudoku is part of my series of "build-your-own-loop Sudokus". If you liked solving this puzzle or if you prefer other combinations of loop logic and constraints, feel free to give the other sudokus of the series a go too:
| Loop Logic | Loop Constraint | Further Constraints | ||
|---|---|---|---|---|
| Entropic-Zipper- Loop |
Counting Cells | Entropic Line | Zipper Lines X-clues |
|
| Hiking-through- the-Fog Loop |
Signposts | Dutch Whisper, Polarity Line |
Kropki Dots X-clues |
|
| Renbanimo Loop | Pentominos Guiding Cells |
Renbanimos | Kropki Dots Odd cells |
|
| Deceiving Loop | Wrogn Clues | Wrogn Clues | 9 different constraints |
|
| Count-the- Whispers Loop |
Counting Cells | German Whispers | Kropki Dot | |
| Whisper-me- Sum-thing Loop |
Line-sums | German Whispers | Kropki Dots | |
| Road Running Loop |
Road Runner | Parity Line | Kropki Dots | |
| Magically Modifying Loop |
- | Incrementers, Decrementers, Nullifiers |
Magic Squares, Killer cages, Kropki Dots |
|
| Skiing Loop | Gates | German Whispers | Kropki Dot, Between Lines |
|
| Behaving Loop | 3x3 boxes | Polarity Line | Kropki Dots | |
| Magical Loop | Guiding cells | Modular Line | Magic Squares | |
| Foggy Loop | Guiding cells | Parity Line | Fog of War, Killer Cages |
|
| 10-Suȵ Loop | Moon-or-Sun | 10-Line | Killer Cages | |
| Counting Loop | Galaxies | Counting Line | Killer Cages, Kropki Dots, Quadruple Clues |
|
| Shining Loop | Moon-or-Sun | Parity Line | Killer Cages | |
| Interfering Loops | Slitherlink + Masyu |
Entropic Line + Parity Line |
Killer Cages | |
| Slithering Loop | Slitherlink | Entropic Line | Killer Cages, Little Killer |
|
| BigBang Loop | Galaxies | Parity Line | Row/Column Indexer, Kropki Dots |
|
| Summing Loop | Star Battle | Region Sum Line | Killer Cages, Skyscraper, Kropki Dots |
|
| Whispering Loop | Star Battle | German Whispers | Sandwich Sum |
Solution code: Column 8, followed by row 8
Comments
on 21. July 2024, 18:24 by virus_dave
Brutally hard puzzle. By far the hardest of the series, IMO.
Finally i have solved every puzzle by this author. Very nice puzzles! This one in particular was WAY harder for me than every other one. There must have been some logics that I completely missed, and i'm very curious what it was.
on 4. March 2024, 14:34 by shteev
So hard! Some great logic in here but I doubt I found all of it, my version of the break-in in particular was very brute force.
----
Hey. Thanks for solving the puzzle! In case you are curious, I will try to sketch out my thoughts while setting the break-in in a hidden comment.
-- ElChiglia
on 10. February 2024, 17:49 by Mitsunari
Even i solved it in 6 hours, i find it was easier than i thought. The logical is quite nice to solveand, really, the magigally modifying loop one was harder than this one. An other great one. I really enjoy your puzzles
----
Thanks for the feedback! The number of solves seems to agree that the Magically Modifying one is indeed the more complicated one :) Though I think their difficulty is not easy to compare because their style is quite different. Glad that you like my puzzles, thanks for solving them.
-- ElChiglia
on 22. January 2024, 04:01 by sorryimLate
Wow, that was tough! Almost four hours of pain and patience. But not unfair. Very interesting puzzle.
on 13. December 2023, 19:11 by yttrio
I can only echo the other comments: very difficult but very satisfying to solve, excellent puzzle!
on 11. December 2023, 20:19 by FinnishGuy
This puzzle is brutally hard, with extremely enjoyable and satisfying logic (provided that one manages to find it!).
on 11. December 2023, 19:54 by Bootenks
This puzzle was a hard nut to crack, presenting a relentless challenge right up to the end. The sense of triumph upon completion was immense, making the journey of patience and problem-solving deeply rewarding. Highly recommended for those who relish overcoming tough puzzles.
on 11. December 2023, 18:10 by henrypijames
Kept thinking I must've missed a rule, and couldn't believe for the longest time that it would actually solve. Unrelentingly hard til the very end.
on 10. December 2023, 19:23 by andreatetta
Brutal, it took me 190 minutes. Beautiful logic.
on 9. December 2023, 13:34 by Snookerfan
Great puzzle! Incredibly hard, but full of very satisfying logic. Thank you
