Sudoku Variants Series (058) - Kropki
(Published on 6. January 2015, 00:00 by Richard)
Kropki
This puzzle can be solved without any T&E, but contains a few interesting (starting) steps.
Solve online in Penpa (thx Ours Brun) or F-Puzzles (thx Narayana!)
Place the digits from 1 tot 9 in every row, column and 3x3-block. A black dot means that one of the neighboring digits has the double value of the other digit. A white dot means that the difference of the neighboring digits is exactly one. If there is no dot between two cells none of the constraints is valid.
Solution code: Row 3, followed by row 4.
Comments
on 17. November 2022, 21:12 by Piatato
Very elegant!
on 14. July 2022, 10:14 by Richard
Added additional link for online solving. Thx Narayana!
on 6. February 2021, 07:19 by Narayana
F-puzzles:
https://f-puzzles.com/?id=yycbboqf
on 3. October 2020, 17:07 by Ours brun
@Richard I just released a video about this puzzle - I hope you will be ok with me sharing a Penpa+ link? If not, just tell me and I will edit the video description: https://git.io/JU740
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I am perfectly fine with that!
on 30. October 2016, 04:53 by Richard
@Sunhokim8: Thanks for your observation. Indeed, between 1 and 2 there are two different dots possible.
on 30. October 2016, 03:46 by Sunhokim8
Good puzzle, yet I am kind of curious. number 1 and 2 have a difference of 1, and at the same time 2 is the double of 1. Since no dots means no constraints valid, it would be better if we considered this fact...
on 7. January 2015, 13:21 by marcmees
touch of genius. thx
on 6. January 2015, 12:43 by pin7guin
Richtig genial, wie sich Feld für Feld ergibt!
on 6. January 2015, 09:21 by Statistica
Very nice. I like the combination of Kropki and Standard-Sudoku very much (especially with not so many dots ;-)).
on 3. January 2015, 06:22 by Richard
I wanted to create a different start in this kropki than often used for this type. The way into the puzzle is written in hidden comment; you can read it if you didn't find it yourself during solving.
