Build Your Own Region Sum Lines
(Published on 10. October 2025, 18:09 by Calump)
The Summer Ends
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Rules:
Normal sudoku rules apply.
Build your own region sum lines:
- The start and end points of 6 region sum lines have been given.
- Draw the remaining parts of each line through the centres of some cells so that the digits in every region they pass through have the same sum. (Different lines may have different sums)
- The lines do not branch or cross each other, and only make orthogonal turns.
Clones:
- The two caged areas are clones and contain exactly the same digits in the same relative positions.
- Any region sum lines drawn in the caged areas must also be identical.
Enjoy!
Solution code: Row 9 (left to right)
Comments
on 14. October 2025, 01:09 by dzamie
That's really cool! I like how the RSLs block each other off, and how some of them can take a long while to find their paths, while others are almost instant.
on 11. October 2025, 07:52 by Christounet
Enjoyed this one a lot (even better with the extra given). Thanks :)
on 10. October 2025, 23:03 by wuc
Awesome idea to only give ends of lines. Very cool deductions. The end was a play out of scenarios but still very clever constructed. Great fun thx.
on 10. October 2025, 21:32 by Big Tiger
Unless I missed a handy piece of logic, the last 11 digits for me were murder. Finally made it.
on 10. October 2025, 18:43 by Agent
Great use of the clones in this one!
