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 1, followed by row 9.
on 6. February 2023, 17:03 by Nick Smirnov
CtC-app (for the better look draw the extra regions yourself):
https://tinyurl.com/ynv748vt
on 30. January 2023, 12:26 by Krokant
Cute windoku. :)
F-Puzzles: https://f-puzzles.com/?id=2zesxfml
on 21. July 2011, 10:53 by CHalb
Sehr witzig. Ich habe beim Lösen viel geschmunzelt.
on 22. January 2011, 11:30 by Mody
Wunderschöner Knobelspaß
on 21. January 2011, 14:08 by Statistica
Jepp, klasse. Dankeschön :-)
on 21. January 2011, 13:00 by ibag
Mal wieder ein richtig schönes Rätsel!