The small numbers in the dotted outlined areas are the sum of the digits in that area. Within a dotted outlined area all digits must be different.
Solve online in F-Puzzles (thx Crul!)
Solution code: The main diagonals. First from top left to bottom right, then from top right to bottom left.
on 27. August 2024, 12:20 by mezkur7
Sudokupad: https://sudokupad.app/o3si8aj8k0
on 6. February 2023, 06:20 by Nick Smirnov
Penpa:
https://tinyurl.com/28ady5d4
on 12. November 2022, 07:30 by Richard
Added link and tag for online solving. Thx Crul!
on 7. November 2022, 22:41 by Crul
f-puzzles ilnk: https://f-puzzles.com/?id=262th8sc
Very nice one, thanks!
on 18. November 2010, 18:30 by pin7guin
Wieder ein Richardiger Leckerbissen! Danke! ;)
on 12. November 2010, 20:45 by Luigi
So ein schönes Rätsel und ich darf nicht.....
Freue mich auf Montag!
on 12. November 2010, 16:49 by Mody
Wie schön, daß heute wieder "Richardtag" ist :)
on 12. November 2010, 13:58 by ibag
Mal wieder so ein richtig schöner Klassiker. Danke!