Here is the final puzzle in my series, featuring an example of most of the previous rules. Links to the other puzzles in this series are below. I hope you've enjoyed this theme!
Normal sudoku rules apply: Place the digits 1-9 once each in every row, column and 3x3 box.
Region sum lines: box borders divide a blue line into segments which have the same sum.
Parity lines: digits along a red line alternate between odd and even.
Renban: digits along magenta lines form a set of consecutive numbers without repeats.
Nabner: digits along yellow lines must all differ by at least two.
German Whispers. Adjacent digits along a green line always differ by 5 or more.
Dutch Whispers. Adjacent digits along an orange line always differ by 4 or more.
Kropki: Where two cells are connected by a black dot, one is double the other. Where two cells are connected by a white dot, they are consecutive.
Sudokupad link: https://sudokupad.app/v0cshd1zlh
Other puzzles in this series:
20.06.2026: Emeralds and Beads
21.06.2026: Sapphires and Beads
22.06.2026: Amethysts and Beads
23.06.2026: Rubies and Beads
24.06.2026: Ambers and Beads
02.07.2026: Pearls and Beads
11.07.2026: Citrines and Beads
19.07.2026: Jewels and Beads
Solution code: Row 1
on 20. July 2026, 23:00 by rdesmarais2
Starts as a 1 star then becomes a 4 star out of nowhere then down to a 2 star.
on 20. July 2026, 18:12 by Arheus
Agreed with the other comments, really hard middle. 3*
on 19. July 2026, 22:57 by VitP
easy to start
BRICK WALL in the middle
--> level 3
on 19. July 2026, 21:02 by vukkarak
very easy at the beginning. The middle is a little harder. Nice puzzle.