Sudoku Variants Series (335) - Sudoku Dot.com
(Published on 25. August 2021, 00:00 by Richard)
Sudoku Dot.com
Inspiration for this type comes from PrimeWeasel.
Solve online in Penpa+ (thx again to Henry!)
Apply classic sudoku rules.
A plus sign on the intersection of four cells indicates that both pairs of diagonally opposite pairs of digits have the same sum. A minus sign indicates that those both pairs have the same difference. All possible plus and minus signs are given.
Solution code: Row 2, followed by column 2.
Comments
on 14. August 2022, 00:07 by snowyegret
https://f-puzzles.com/?id=2egt9qgx
on 2. September 2021, 15:03 by pin7guin
Ganz schön knifflig!
on 31. August 2021, 18:37 by Richard
@PrimeWeasel: the connon sudoku is indeed on my list of possible SVS's (Which is a veeeeery long list currently :-) )
Connon is a bit like other types I did before, but can be distuinghished well enough to make it a type on itself.
on 31. August 2021, 18:34 by Richard
@Future DiMono: well done! Solving PrimeWeasel's puzzle immediately brought me to this intrinsic logic and applied it here too.
on 26. August 2021, 10:51 by marcmees
Very nice puzzle. Very interesting negative constraint to debug when stuck. thanks
on 25. August 2021, 21:24 by DiMono
It took me a while to figure out what this puzzle is actually about, which made it much harder for me than it should have been. I think I'll go back and do it again with that in mind from the start, see how it goes. But that's a job for future DiMono.
Edit: Future DiMono here. I was right: this puzzle was significantly easier when I had the right thing in mind from the beginning. I'm going to leave my 4/5 difficulty rating though, as it may take a while to realize what the right thing to look at is.
on 25. August 2021, 19:36 by PrimeWeasel
Very well implemented Richard, resolved smoothly! You might want to have a look at my Connon puzzles and see if you'd come up with anything else for that particular ruleset. Thanks for making this one! And yes, incognito Hollander.
on 25. August 2021, 06:48 by henrypijames
Really difficult for me - 4 stars.
on 25. August 2021, 06:16 by Richard
Added link and tag for online solving. Thx Henry!
on 25. August 2021, 00:30 by henrypijames
Penpa+: https://git.io/JEcdy
