Kuromasudoku
(Published on 26. November 2020, 20:18 by Phistomefel)
The usual Sudoku rules apply. Additionally, some of the cells have to be coloured grey. Grey cells may not be orthogonally adjacent and the non-gray cells have to form a connected set. The grey cells also have to be filled with digits according to the Sudoku rules.
A number in the top left corner of a cell indicates the sum of the digits, that are seen from this cell looking to the north, south, east and west. The cell with the clue counts once in this sum. Grey cells block the visiblity. A cell with a clue may not be coloured grey. Within the field of vision of a clue, digits may repeat if the Sudoku rules allow it. Parts of these formulations are taken from ahaupt's description of his Killer Construction.
For illustration, here is an example on a 6x6 grid:
Here you find a link to the example.
The puzzle is available online via Penpa Plus, as well. Have fun solving!
Solution code: 5th and 9th row
Comments
on 7. August 2024, 10:38 by Piatato
Lovely!
on 23. September 2022, 12:55 by Christounet
Very cool combination. Enjoying very much to go through these "old" sudoku-pencil puzzles hybrids of yours !
on 12. August 2022, 07:11 by KNT
Nice and smooth! Fun hybrid.
on 20. September 2021, 08:12 by dissonance
Challenging puzzle and great solving path.
Thanks for sharing.
on 3. March 2021, 15:13 by Mody
Großartig, hat viel Spaß gemacht.
on 21. December 2020, 13:00 by Phistomefel
Stichwort hinzugefügt.
on 1. December 2020, 19:42 by swaroop2012
@Phistomefel - Thank you. Yes, I am the same person. I am glad it's helping the puzzle community. I also have added a new Sudoku Solving mode (a couple of days back) (You can find it besides "Composite" mode) which functions similarly to CTC app. I hope you all like it.
on 30. November 2020, 02:20 by swaroop2012
Brilliant. The ending was tough and challenging but enjoyed thoroughly.
@swaroop2012: Thanks a lot for your nice comment and special thanks for providing the online tool to actually make a comfortable solve of this puzzle and many others possible (presuming you are the swaroop programming the Penpa Plus software).
on 29. November 2020, 09:43 by Phistomefel
@SirWoezel, @DiMono, @Hal_Incadenza, @marcmees, @Guaste: Thank you so much for your wonderful feedback! :)
on 28. November 2020, 22:46 by Guaste
amazing path. keep up the good work and greetings from argentina
on 28. November 2020, 20:28 by marcmees
enjoyed that.
on 28. November 2020, 09:16 by Hal_Incadenza
This was really entertaining with a great solving path! Thanks Phistomefel!
on 28. November 2020, 00:39 by Hal_Incadenza
This was really entertaining with a great solving path! Thanks Phistomefel!
on 27. November 2020, 21:56 by DiMono
Very nice puzzle. It took me a minute to get my head around the logic, but after that it flowed very nicely. The Kuromasu portion reminds me of Hitori, to some extent.
on 27. November 2020, 17:50 by SirWoezel
Superb. I never heard of a kuromasu before. I'll have to check them out now too...
on 27. November 2020, 12:31 by Phistomefel
@dyutin, @Statistica, @cdwg2000: Thank you for your warm words! I am glad you enjoyed the puzzle.
on 27. November 2020, 11:00 by cdwg2000
It’s very good, let’s order more such delicious dishes.
on 27. November 2020, 10:07 by Statistica
Ganz klasse!
on 27. November 2020, 03:35 by dyutin
Great puzzle!
