Place some stars in the grid such that every row, column and bold-outlined region contain 2 stars. Stars cannot touch, even diagonally. Example with 1 star :
You can use Penpa-edit for solving it on your browser.
Solution code: Positions of stars in row 3, 5 column 1 and 12 in that order (the leftmost/upmost first); relevant rows/columns are marked for convenience. Example (all rows in descending order of example : 153624
on 12. August 2021, 09:02 by Dugong
Wonderful =)
on 15. November 2020, 23:33 by justnow
This is a really nice puzzle
on 2. July 2020, 11:15 by Statistica
Nice. BTW: the german translation for this type is "Doppelstern"
on 1. July 2020, 17:29 by glum_hippo
I really enjoyed this