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.
Solution code: Column 9, followed by row 9.
on 23. December 2022, 20:09 by Nick Smirnov
CtC-app:
https://tinyurl.com/445mpjmj
on 18. November 2012, 02:15 by Ours brun
Superb one, as usual. Very pleasant solve; so much better than the average killer sudoku. Thank you Richard!
on 5. April 2011, 13:54 by Fred76
Danke für die zwei ausgezeichnete Killer Sudoku, Richard !
on 1. April 2011, 17:45 by Mody
Tolles Rätsel und angenehm schwer :)
on 1. April 2011, 17:15 by ibag
Mal wieder klasse konstruiert! Auf das Freitagsrätsel kann man sich immer freuen! Danke, Richard.