Sudoku Variants Series (169) - Average Sudoku
(Published on 21. February 2017, 00:00 by Richard)
Average Sudoku
Solve online in Penpa+ (thx Nick Sirnov!)
Place the digits from 1 tot 9 in every row, column and 3x3-block. If the number in a cell equals the average of its two horizontal neighbours, then the cell is marked with a horizontal line. If the number in a cell equals the average of its two vertical neighbours, then the cell is marked with a vertical line.
Solution code: Row 5, followed by column 7.
Comments
on 10. August 2022, 06:19 by Richard
Added link and tag for online solving. Thx Nick!
on 30. August 2021, 15:57 by Nick Smirnov
Penpa:
https://git.io/JE1Hy
on 12. May 2020, 17:13 by Circleconstant314
@Richard: Thank you! :D Yeah I suppose that's right, too. Now to solve this one!
on 12. May 2020, 17:09 by Richard
@Circleconstant314: Yes, there is. And I think the negative constraint becomes clear from the instruction itself: if the number in a cell equals the average of it's neighbours, there is a line. So: no line, no average. ;-)
on 12. May 2020, 14:47 by Circleconstant314
Is there a negative constraint, here? As in, if in a cell there is no line drawn in one particular direction, then that digit cannot be the average of those two? So say, the permutation 468 is not valid if there's no line in the cell with the 6 indicating that the relationship exists?
on 23. February 2017, 12:14 by RobertBe
Nog vele jaren!
on 23. February 2017, 11:02 by CHalb
Richard, I've just noticed right on your birthday: You've reached a new portal milestone with exactly 20.00 % of the published puzzles.
Happy birthday!
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With the still continuing flooding of the portal, the percentage is decreasing every day...
One thing is sure: there will never be 20% in that statistic again. ;-)
on 21. February 2017, 12:22 by flaemmchen
Wie schön: Joe Average hat das Average-Sudoku als erster gelöst :-)
