Dynamic Duos
(Published on 22. August 2021, 17:32 by Niverio)
- Normal Sudoku rules apply.
- There are 8 given lines on the grid. Every single line must satisfy EXACTLY 2 of the following 8 constraints:
- Arrow
- Between Line
- German Whispers
- Kreska Line
- Lockout Line
- Palindrome
- Renban
- Thermometer
- Every single constraint will be used exactly twice.
Puzzle Links: Solve in either F-puzzles, or solve it in CTC Software. Or you can solve it in Penpa+ with answer check for the filled Sudoku grid.
Detailed constraint explanations:
Arrow: One end of an Arrow line must be the sum of all the other cells along the line.
Between Line: Cells along a between line's two endpoints must have values between the two endpoint values.
German Whispers: Adjacent digits along a German Whispers line must differ by at least 5.
Kreska Line: Adjacent digits along a Kreska line must either be consecutive, or have a ratio of 1:2. Digits along a Kreska line cannot repeat.
Lockout Line: The endpoints of a Lockout Line must differ by at least 4. Digits on the line must be different than the endpoint values and must not fall between them.
Renban: A Renban line contains a set of consecutive, non-repeating digits in any order.
Palindrome: Digits along a palindrome line read the same forwards and backwards.
Thermometer: Digits along a thermometer must increase starting from the bulb end.
Solution code: First Row 9, then Column 5 (No commas or spaces, 18 digits)
Comments
on 7. May 2023, 14:48 by Mr.CHEN
My first 5-star puzzle to solve! It is also the 1000th puzzle I solved on LMD! congratulate!
I spent a lot of time intermittently solving this puzzle within a week. At first, I didn't find any problems in the derivation, but in the end, I kept making mistakes. Then, I couldn't figure out where the mistake was, so I started over several times before finally discovering the wrong place (I accidentally deleted an extra pencilmark.), and finally successfully solved it.
very nice puzzle！
~ Congratulations on 1000 puzzles! I am also honored that you chose this puzzle to be your 1000th solve, thank you so much!
on 20. October 2022, 01:09 by Perladel
Solving this puzzle was really tough, but in the end it was very rewarding. Superb idea
on 4. September 2022, 01:26 by Agent
Very clever and unique puzzle! I liked like out of nowhere, it suddenly became clear how the constraints paired together. And these given 4s were absolutely magical.
on 8. August 2022, 20:04 by filuta
this was again super fun, and very impressively constructed too! possibly the trird best sudoku I was able to solve so far.
~ I am glad you enjoyed! There is a reason why this puzzle is in my opinion my best creation ;)
on 19. July 2022, 04:26 by cdwg2000
Awesome, this is the toughest and most satisfying puzzle I've come across so far.
on 4. July 2022, 10:42 by Niverio
Since this is my favorite puzzle on the site and I published it a year ago with no good HTML knowledge, decided to give the puzzle page a revamp, added CTC and Penpa links, and updated image and rule formatting.
on 4. June 2022, 17:19 by Vebby
Brilliant construction! Surprisingly smooth solve path for a 5-star puzzle, really enjoyed it. :)
on 18. May 2022, 04:40 by Krokant
What a puzzle! A lot of eye-opening moments along the way made this so much fun. A really stunning puzzle.
on 22. November 2021, 14:45 by kolot
Lovely puzzle! This was a real challenge even having set two similar puzzles. Very nice logic throughout the solution path.
on 12. November 2021, 15:29 by polar
Phenomenal puzzle! An absolute masterpiece - thank you!
on 3. November 2021, 17:27 by JoWovrin
This puzzle gave me so many "aha" moments, excellent idea and super well executed!
on 27. October 2021, 03:40 by tallcat
Really quite blown away by this. Amazing stuff
on 24. October 2021, 20:41 by twototenth
A sublime work of staggering (and possibly insane) genius. One of my favorite solves, ever.
on 30. September 2021, 19:09 by Niverio
Changed the difficulty from hard to very hard.
on 27. August 2021, 01:12 by Piatato
Terrific puzzle! Quite a masterclass!
on 24. August 2021, 17:43 by Playmaker6174
Very cool and fun puzzle, it's crazy to think how much restriction could be done during some steps. I think this one should get more attention :)
on 24. August 2021, 08:52 by Elliott810
An unbelievable puzzle! I've learned a lot about the involved line types and their structural relationships. Great work of yours to discover all that and set a puzzle with it. Thx:)
~ Ty so much for the kind words! And yes, the setting process for this puzzle was basically a constraint learning tutorial for me and finding a way to line the logic in a pleasant way :D
on 23. August 2021, 21:43 by Mr.Menace
Fantastic puzzle, takes some brain-melting to solve, but it was totally worth it!
on 23. August 2021, 11:54 by grkles
Wow, what a puzzle! This is something truly special.
