Roadblocks
(Published on 5. August 2024, 18:00 by jwsinclair)
Roadblocks, by James Sinclair
Normal sudoku rules apply, and all clues are standard.
German whispers: along green lines, digits must differ from their neighbors by at least 5.
Digits in cells separated by a V sum to 5.
Digits in cells separated by an X sum to 10.
Digits in cells with a shaded square must be even.
Digits in cells with a shaded circle must be odd.
Play online
This puzzle was originally published in Artisanal Sudoku, Volume 135, which is a special edition featuring bonus puzzles and hints for all (those things are behind the paywall in a typical week).
Solution code: row 4
Comments
on 6. February 2026, 01:26 by ongel
9:25 this was really fun, once I got the first few digits everything just seemed to fall into place! thank you :)
on 6. February 2026, 00:45 by nunc
09:30. It all fell into place:-) Some of these puzzles need a lot of parsing in the end, this one didn't. Appreciated.
on 30. January 2026, 18:39 by NotSoMagnifique
You know how much I love a puzzle where the geometry is thoughtful with the constraint!
on 7. August 2025, 10:43 by cdeelman
Thank you for that puzzle, the interaction between the constraints was very satisfying! 15:47
on 17. March 2025, 18:12 by tinkerer
11:16, really nice puzzle
on 26. November 2024, 18:21 by burgermason
it's difficult at first, but it gets easier when you remember the rules for german whispers
on 15. September 2024, 08:42 by Inge
18.43
Very nice puzzle!
on 8. September 2024, 22:24 by MetaceR
I don't know how but 13:43 :)
Decent one.
on 21. August 2024, 13:14 by Spoonmans
I spent 60 minutes on this and couldnt place a single number. I fear this is far above my measily level
--
Oof, sorry to hear that! If you click on the Artisanal Sudoku link above and scroll down, there are some hints that might help you get started
on 20. August 2024, 16:47 by ClayLovesLogic
https://www.youtube.com/watch?v=T-PV_agtS4E
Link to my solve :)
on 18. August 2024, 22:57 by mnstrmisha
28:08
not a very fast solve but in my defence i was watching a movie simultaniously haha, very nice puzzle!
on 17. August 2024, 22:32 by Hirrumi
Geil
on 15. August 2024, 22:52 by yasmim.nat
40:02 - this one was really fun to do!!!!
on 15. August 2024, 17:35 by zimmicks
40:28 - Thanks!
on 9. August 2024, 05:55 by Ganbatte
Thanks for a fun 1-star puzzle!
on 5. August 2024, 20:25 by permafrostyx
blocky
on 5. August 2024, 19:19 by GeorgeTheToad2
Very nice to unblock the road. Thank you.
on 5. August 2024, 18:42 by sujoyku
Thank you for this incredible puzzle, jwsinclair! It is approachable and resolves in an absolute elegant and harmonious way. A true masterpiece! I wish you all the best for the next 135 volumes of Artisanal Sudoku!
on 5. August 2024, 18:30 by anyeyeball
Very nice. Remarkable interaction of the constraints led to a very smooth solve.
