Normal Sudoku rules apply.
Digits along a blue 'Region Sum Line' must add to the same total in each region that the line enters. If two segments of the line are in the same box, each segment adds to the target total. Each line may or may not have a different associated total.
If there's a diamond between two horizontally adjacent cells, then the absolute value of their difference is the same as the leftmost digit in that row.
If there's a diamond between two vertically adjacent cells, then the absolute value of their difference is the same as the topmost digit in that column.
Not all possible diamonds are necessarily given.
And here is the puzzle (also available on the CtC app):
Solution code: Row 2, then column 3 (18 digits total).
on 17. April 2023, 19:45 by marcmees
nice. thanks.
on 25. March 2023, 14:44 by Qodec
Fantastic idea, thank you!
on 15. March 2023, 01:48 by ralphwaldo1
Nice and interesting logic, the small equal sum line powerfully disambiguating at the end.
on 18. February 2023, 16:20 by Stingrayy
Very nice - even more cool ideas with this rule set!
on 15. February 2023, 03:41 by wenchang
Very Nice and Interesting diamond setup. Spoiler alert!
https://www.youtube.com/watch?v=b0C6SUpDrKo
Thank you for solving my puzzle :) Is this your first glum_hippo feature?
on 13. February 2023, 19:03 by Nalinchen
Excellent puzzle with a lovely break in and some very nice deductions along the path!
—— Thanks so much for your comment and for solving!
on 13. February 2023, 16:23 by Ragna
Tolle Idee! Das hat Spaß gemacht. Vielen Dank! :-))
Danke, liebe Ragna... schön von Dir zu hören! Kriegt man da nicht auch große Lust auf Quittengelee?
on 12. February 2023, 18:33 by PixelPlucker
Great, thanks!
—— ...and thank YOU for solving
on 12. February 2023, 18:19 by Fool on Hill
Lovely puzzle. Not too hard - the break-in is particularly neat and sustained logic alongside a smooth solve. One head scratch moment soon resolved. Definitely harder than 2 and below a 4 for difficulty.
—— thanks for your comment, and for being such a good shepherd to others for the Fossil Hunt.
on 12. February 2023, 17:22 by glum_hippo
Thanks to Snookerfan, Jesper, ONeill, tallcat and grkles, for your kind feedback!
on 12. February 2023, 16:14 by Snookerfan
Brilliant puzzle! Thank you
on 12. February 2023, 11:21 by Jesper
Excellent puzzle, nice to see this series continuing :)
on 12. February 2023, 05:22 by ONeill
Very cool puzzle!
on 12. February 2023, 04:40 by glum_hippo
Estimate moved to 3 stars. Thanks @tallcat
on 12. February 2023, 04:01 by tallcat
I found this much harder than 2/5 - but it was my first time solving this type of puzzle so it's certainly on me. Nonetheless, was very enjoyable and well constructed!
on 12. February 2023, 02:42 by grkles
That was fabulous! I really really enjoyed it.