Delimited Kropki
Solve online in Penpa+ (Thanks Nick Smirnov).
Inspiration for this type comes from Sudoku GP 2020 Czech Republic round.
Apply classic sudoku rules.
Only for two cells connected by a grey line, kropki rules apply:
A white circle between two cells indicates that the neighbouring digits are consecutive.
A black circle between two cells indicates that one of the digits is twice as big as the other digit.
The absence of a circle indicates that there is no neighbouring digit that is either consecutive or double.
Be aware that between digits 1 and 2 the circle can be either white or black.
Solution code: Row 5, followed by column 7.
on 20. November 2021, 16:02 by Richard
Changed link for online solving. Thanks Nick!
on 11. November 2021, 13:01 by Nick Smirnov
Penpa (with Sudoku mode available):
https://git.io/JXS12
on 3. November 2020, 08:27 by ffricke
Ich hab ein bißchen gebraucht, bis ich den Einstieg gefunden habe, aber dann ging es (wie immer bei Richards Rätseln) logisch durch
on 3. September 2020, 17:16 by ibag
Very nice!
on 26. August 2020, 10:31 by pin7guin
Hat Spaß gemacht, danke!
on 20. August 2020, 16:29 by Richard
@Henrypijames: Great! Armoured with that new knowledge I can recommend you SVS58, 161 and 181. ;-)
on 20. August 2020, 16:24 by henrypijames
Thanks for the hint - it was very helpful, and, just as I suspected, a piece of basic Kropki logic that I failed to discover. Had I known this logic a priori, I would've agreed with the 3-star difficulty.
on 20. August 2020, 15:27 by Richard
I received some feed back about the difficulty level of this one. There is a not-so-hard-to-spot logical opening in this puzzle. It may be not in the most trivial place though.
Understanding how kropki dots work may help. Especially if you are new to it.
on 19. August 2020, 11:43 by Statistica
Mal wieder sehr schön!
on 19. August 2020, 05:44 by Richard
Penpa link added; thanks psams!
on 19. August 2020, 03:33 by Greg
Very enjoyable!!!
on 19. August 2020, 03:03 by zhergan
Perfect implementation..
on 19. August 2020, 01:02 by psams
Penpa version: https://tinyurl.com/yy24osvm