Day 17: Clever Irregularity
(Published on 17. December 2025, 06:00 by SharpFox)
Rules:
- Place the digits 1-4 into every row and column. Digits do not repeat in regions, which are limited by thick, black lines.
- A digit in a gray circle is odd. A digit in a gray square is even.
- A red parity line contains one even and one odd digit.
- Each two digits on a yellow Nabner line are different and not consecutive.
- Digits seperated by a V sum to 5.
Solution code: The central 2×2 (the digits on the red lines) in normal reading order (4 digits):
Comments
today, 00:56 by FireTruckFuel
This is the first time I have seen a broken region in an irregular puzzle before. I published an irregular puzzle myself just today but playing around with this would have been interesting too. Thanks for the idea!
on 17. December 2025, 15:57 by PinkNickels
1:27 today. Fun speed run
on 17. December 2025, 11:14 by superkinkel
This is very nice, but if any 4*4 is more than a single star, that would be one of them I'd say.
on 17. December 2025, 07:43 by wuc
Another great snack thx.
on 17. December 2025, 06:10 by Zpixi09
ive been doing all the other puzzles (just never bothered to enter the solution code) but i just wanna say this is a really fun series, its nice having daily little snack puzzles, keep it up
