Incantation
(Published on 23. April 2025, 19:31 by Gerhard1963)
I've had the idea for this type of line constraint for a while now and decided to make an easy puzzle to demonstrate it.
Rules:
- Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box.
- Quartet Lines: Red lines may have no more than 4 different digits.
- Kropki pairs: Digits in cells separated by a black dot are in a 2:1 ratio. Digits in cells separated by a white dot are consecutive. Not all dots are necessarily given.
- Digits in grey squares are even.
SudokuPad
My Puzzle Catalogue
Solution code: The digits on the positive diagonal (from bottom left to top right).
Comments
on 28. April 2025, 20:43 by dzamie
This was fun! I enjoyed the concept of the red lines, and kinda wish it took longer to figure out what the set of numbers was for each. Still, puzzle certainly didn't disappoint, engaging all throughout.
on 28. April 2025, 20:34 by Natclass
Excited to see more of this constraint! Well done :)
on 28. April 2025, 19:13 by PancakePie
fun and nice
on 25. April 2025, 13:55 by TeddieMilo
First time encountering this rule, fun & interesting. Thank you!
The red line make it difficult to read the pencil numbers though.
on 24. April 2025, 19:10 by RNGustav
Very nice one. Thank you :)
on 24. April 2025, 11:13 by Deklok
Very nice and easy to understand constraint. Thank you
on 24. April 2025, 10:37 by Franjo
Nice idea, elegant setting. Thank you very much for sharing.
on 24. April 2025, 01:16 by Sparky
Very fun one, thank you !
on 23. April 2025, 22:18 by Exigus
Neat idea, thanks!
on 23. April 2025, 21:08 by Gambit
Great refreshing puzzle
on 23. April 2025, 20:57 by sujoyku
Thank you for this fun puzzle, Gerhard1963! I loved how much "normal sudoku" comes from the Quartet Lines. Great construction!
