Rules:
Normal Sudoku rules apply.
Blue lines are region sum lines: 3x3 box borders divide blue lines into segments with the same sum. Different lines may have different sums.
Orange lines (along the top heart) are Dutch whispers lines: Adjacent digits along an orange line must have a difference of at least 4.
Red lines (along the bottom heart) are parity lines: Digits along a red line must alternate between even and odd digits.
Note: If a line only passes through a small corner of a cell, it is not considered to visit that cell.
Solution code: Row 1
on 16. February 2025, 12:31 by Franjo
Lovely design for a lovely puzzle - amazing! Thank you very much for creating and sharing.
on 16. February 2025, 08:53 by Onkel_Dagobert
A beautiful puzzle, quite a bit harder for me than it should have been, but I struggled to see one particular deduction. Once I got it, everything fell into place nicely.
on 15. February 2025, 10:54 by Snookerfan
Beautiful, thank you!
on 15. February 2025, 10:40 by sujoyku
What a lovely puzzle! The logic is no less beautiful than the grid layout and unfolds smoothly. Thank you for this awesome treat, yttrio!
on 15. February 2025, 09:28 by wuc
Great fun thx.
on 15. February 2025, 05:52 by Big Tiger
I have tried it twice and both times the blue line going through Box 5 becomes impossible. Others have solved it so clearly I'm missing something.
*** Ooooh, third time's a charm. I see my mistake.
on 15. February 2025, 05:33 by Nordy
After solving the puzzle, I truly can’t decide which heart is better! Perfect, buttery-smooth 2-star logic
on 15. February 2025, 05:15 by Nordy
Hahaha. Calvinball - I take that as an utmost compliment. I call being the red heart!
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I have no problem being the orange heart, so that works for me!
~yttrio
on 15. February 2025, 04:27 by Calvinball
In my head canon this puzzle is about yttrio and Nordy and no one can ever take that away from me! Brilliant puzzle as well.
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