Blacken some cells and fill the remaining cells with digits 1-8, so that no digit repeats in any row or column.
Outside hints give the sums of connected digits (without blackened cell between) in the corresponding row or coloumn. Some of the hints are replaced by question marks, ? for a one digit number, ?? for a two digit number. In every row or coloumn either all hints are given or none.
The hints are not necessarily given in the right order, but are sortet by their size. This holds espacially also for hints replaced by question marks.
The blackened cells built a coral.E.g. they are connected orthogonally, don't contain 2x2-areas, and the cells with digits are orthogonally connected to the boundary.
Solution code: Row 8 followed by column 8, S for blackened cells.
on 14. July 2026, 00:40 by cyddrdrd
Really smooth and great fun!
on 4. July 2026, 23:15 by lupo
Sehr schön - sobald man die richtigen Regeln beachtet ;-)
on 3. July 2026, 16:43 by AnnaTh
Vielen Dank für die tollen Leftovers
on 3. July 2026, 14:57 by CHalb
Bravo, toll konstruiert!
on 1. July 2026, 22:12 by Christounet
Very fun! Thanks :)
on 1. July 2026, 15:02 by Agent
Great fun!
on 30. June 2026, 08:54 by marcmees
smooth swimthrough - once I realised only digits up to 8 were required :-).
Thanks
on 30. June 2026, 04:23 by Playmaker6174
Small penpa link for solving (no answer check): https://tinyurl.com/23xubpmg
Sweet and fun puzzle, I had lots of fun at the end :)
on 29. June 2026, 22:27 by Piatato
Lovely!