Uncle-Knight
(Published on 4. June 2026, 17:10 by billybeth)
Even digits have an uncle-knight restriction in that each even digit must have the same digit in one or more cells a chess knight's move away from it.
Green squares are higher than their neighbouring orthogonal squares and pink squares are lower. All squares are given.
Black dots show digits in the ratio of 1:2, not all dots are given.
On the green line adjacent digits must be at least five apart.
Solve online:Sudokupad
Solution code: top row
Comments
today, 19:08 by ShadyAshley
This was a fun one! The negative restriction on squares led to some cool logic. I definitely forgot about the uncle knights at first, but once I double checked the rules and remembered that, it went super smoothly!
Definitely agree with others that this is higher than 1* though. It was not super difficult, but it still requires some sophistication in approach. The break in requires a particular idea, and there are a lot of points where the way forward isn't obvious and needs scanning.
I think of 1* puzzles as ones where someone new to the ruleset can jump right in and have a smooth solve while learning how the logic behaves. This one requires some particular broad observations to break in- someone unfamiliar with squares logic will have to really think about where to even begin. And someone without experience in the ruleset will struggle to scan the puzzle efficiently.
I think it's at least 2* for that reason. Still, love this puzzle!
today, 12:55 by Dendr
I stuck with 20 something cells unfilled. And THEN i realized that there's an uncle-knight restriction. Difficulty suddenly dropped from 3* to 1*. Geez, where were my eyes?
today, 00:15 by sparkymanu
Same as the others, very nice 2* ! Thank you for submitting :)
yesterday, 03:41 by TeddieMilo
Agree with others, it is very nice but need a bit of work to complete. TQ!
on 4. June 2026, 21:21 by dzamie
"Uncle-knight" is clever. Fun puzzle! But yeah, definitely at least 2*
on 4. June 2026, 19:38 by DanishDynamite
Very nice, but much higher than a 1* for me.
