Unique, You Nork
(Published on 9. January 2026, 08:45 by cygne)
Unique, You Nork by Cygne
Rules
- Normal Sudoku rules apply. Digits may not repeat in any row, column or 3x3 box.
- Uniqueness: Additionally, digits may not repeat within any of the following constraint types.
- Renban: Digits along a pink line form a set of consecutive numbers in any order.
- German Whispers: Adjacent digits along a green line differ by at least 5.
- Dutch Whispers: Adjacent digits along an orange line differ by at least 4.
- Entropy: Each set of three adjacent digits along a peach line contains exactly one small digit (1, 2 or 3), one medium digit (4, 5, or 6), and one large digit (7, 8, or 9).
- Region Sum: 3x3 box borders divide blue lines into segments of equal sums.
- X-Sums: Digits separated by an X sum to 10.
- V-Sums: Digits separated by a V sum to 5. (X and V sums are considered separate constraint types for Uniqueness)
I've been playing around with uniqueness constraint puzzles and built this one off of a pretty fun and hopefully intuitive deduction. It's my first puzzle of this type, so any feedback is greatly appreciated!
If you enjoy this one, and I hope you do, please consider giving Dutch Pinwheel a try!
Solution code: Column 5 digits, top to bottom
Last changed on -
Solved by Piff, Snookerfan, Exigus, Krisonium, snuuba, gdc, Myfyr MJ, ordnanceordinance, ArtsiBurger, RebelSystem, SKORP17, brimmy, Shmartus, pseudoku, Hengist, doomedmageknight, ThePhaeton, Jagga, Bjd, ... Janie, GeorgeTheToad2, chinesemaster, dogfarts, anthe95, ankpress, tuckerbucket, Corey115, botteur, Julianl, b413x, littlebluue, gige, PippoForte, mezkur7, LehanLehan, Yoica, BHUNTER47, sedici
Comments
on 10. January 2026, 20:38 by GeorgeTheToad2
I found that quite hard but eventually remembered the unique constraint on the XV constraint as well as the lines. Doh. Got there in the end. Nice set up.
on 10. January 2026, 02:36 by ThePhaeton
Very fun solve, thanks!
on 10. January 2026, 01:11 by Hengist
wonderful unique constraint digits puzzle!
on 9. January 2026, 14:52 by Myfyr MJ
Very nice and quite easy too.
on 9. January 2026, 13:42 by snuuba
Another beauty from Cygne. Many thanks.
on 9. January 2026, 11:47 by Exigus
Great use of the unique constraint. Thanks!
on 9. January 2026, 10:25 by Snookerfan
Very nice, thank you!