The grid contains two overlapping killer sudokus.
Place the digits from 1 tot 9 in every row, column and 3x3-block of both grids. The small numbers in the dotted outlined areas are the sums of the digits in that area. Within a dotted outlined area all digits must be different. Some of the cage sums are replaced by a question mark. Those cage sums have to be determined by the puzzlers themselves. Question marks may not be replaced by a sum of 11, 12 or 20!
Solution code: Row 5, followed by column 7.
on 26. November 2022, 19:03 by Nick Smirnov
Penpa:
https://tinyurl.com/2jsx4mtw
on 23. July 2016, 13:35 by skypper
Toll zu lösen, leichter als gedacht
on 21. March 2012, 21:04 by Eisbär
Pffffffffff.... :-D
on 10. January 2012, 01:14 by pin7guin
Klasse! Ein typisches Richard-Rätsel: Stück für Stück ergibt sich der Lösungsweg. Danke!!!
on 9. January 2012, 22:53 by ibag
Kunstvoll gemacht!
on 9. January 2012, 18:59 by rob
Klasse. Aber für mich mit Sicherheit mehr als drei Sterne…
on 8. January 2012, 19:27 by RobertBe
Wonderful design!
on 1. January 2012, 15:42 by Mody
Wunderschön schwierig :)
on 31. December 2011, 20:33 by Alex
thanks for another wonderful Sylvester puzzle. My last in 2011. :D
A Happy New Year to all my puzzle friends!
on 31. December 2011, 19:07 by zhergan
I also wish a happy 2012 for all of you. And special thanks for this very nice puzzle...
on 31. December 2011, 18:30 by ch1983
Guten Rutsch auch von mir, vielen Dank für das schöne Rätsel!