Logic Masters Deutschland e.V.

VariantDoku Daily Puzzle: May 23

(Published on 23. May 2026, 12:59 by Brandy New)

Try solving this one in your mind.

Normal sudoku rules apply. Place the digits 1-4 once each in every row, column, and 2x2 box.
Kropki: digits separated by a black dot are in a 1:2 ratio (one digit is double the other).

Solve in VariantDoku (iOS) or on SudokuPad.

Solution code: Enter the digits of row 3.


Solved by gwai77, Dr Logic, Narayana, marcmees, naggy, tiuhto, Mozart40, TeddieMilo, Fisherman, cmigas, buzzard, Zzzzz..., MartinR, bloodhovnds, TVDK, BKKGarrett, ThirdWiseMonkey, Javier Rebottaro, fuxia, ... macintux, clapslat, Jett, Spooof, Jordan Timm, rjhill, Anthony, arangues, renewedrebirth, digital_lighting, Jrgamer4u, marsigel, palul95, ManniMensen, abihummel, Crul, Thomster, Krisonium, pepe74287
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Comments

on 26. May 2026, 21:21 by Anthony
What a nasty bunch of comments totally refusing to honestly engage with the creator of this puzzle. If you don't like the puzzle, that's okay. Feel free to move on with your day.

on 24. May 2026, 20:52 by Brandy New
Just to clarify: none of the puzzles in this series are AI-generated.

I use a homemade tool to help with construction, checking uniqueness, and estimating human solvability. That does not make the puzzles “GenAI-generated.” As was already mentioned, using a construction/checking tool is not the same thing as using generative AI.

And honestly, I would be very surprised if nobody here uses tools to help construct or check their puzzles in some way.

on 24. May 2026, 16:32 by DiMono
"I think saying “GenAI steals work from other people” is too broad and misleading in this context." - No, it's not. It is 100% accurate and always applicable whenever genAI is used. GenaI is trained on other people's work WITHOUT THEIR KNOWLEDGE OR CONSENT AND WITHOUT COMPENSATING THEM FOR IT and then used to make a profit. That is literally the definition of stealing work from other people.

"If the issue is that the puzzle uses rules or constraint types that have appeared in other puzzles before" - NOBODY SAID THAT. You are defending against a position that has not been proposed by anyone in order to claim an easy win. This is called a strawman argument, and it is intellectually dishonest.

I don't know nor care whether this particular puzzle was made with genAI. LMD is a place for handcrafted puzzles. The fact that you've used genAI in previous puzzles casts doubt on every puzzle you will ever post here. It is clear "your" puzzles are not wanted. Peddle your stolen wares somewhere else.

on 23. May 2026, 18:07 by Brandy New
Just to clarify: no AI was used to generate this puzzle.

I use a tool that works somewhat similarly to sudokumaker. It helps check uniqueness and gives an estimate of human solvability based on handmade heuristic algorithms. But the puzzle itself was not generated by AI.

on 23. May 2026, 17:04 by Brandy New
I think saying “GenAI steals work from other people” is too broad and misleading in this context.

If the issue is that the puzzle uses rules or constraint types that have appeared in other puzzles before, then almost every puzzle would have the same problem. Reusing a rule is not the same as stealing someone’s puzzle. Sudoku variants constantly build on shared rules, genres, and ideas.

Of course, copying a specific puzzle, layout, solve path, or original construction would be wrong. But generating a new puzzle from known rules and then checking it for uniqueness and solvability is not the same thing.

on 23. May 2026, 16:54 by TVDK
Firstly, I never said "easy" or "low effort" (I know the other commentor did, but you ignore my points), I said low quality, genAI flood of daily puzzles which you didn't address in your comment. The puzzle portal even states that "the puzzle portal is intended for handcrafted puzzles" [Help > Publish Puzzles] and these puzzles clearly don't comply.

There's also a massive difference between using computer software to assist in setting (e.g. by checking if there's still a possible valid solution, or checking for basic sudoku that a setter may have missed) compared to using generative AI to basically create the puzzle and then just editing/refining the output (or whatever you do). I feel like calling these generative AI made puzzles as "computer-assisted" is misleading due to the difference between the previously mentioned computer assistance tools, and using generative AI.

As an aside, even if you were putting in lots of effort (which you really aren't), it's still spam.

The puzzles themselves have not been unique (in terms of novelty/etc, not as in having a single solution), interesting or pleasant to solve. Literally any human setter could make something better with the same amount of time/effort (or less), e.g. your May 22 puzzle is really bad and no decent human setter would make it. Someone was so annoyed by how stupidly bad it was, that they made a version of it that was so much better.

Also, don't expect the setters of handcrafted puzzles to enjoy your work as generative AI just steals from other people's hard work, in this case, their handcrafted puzzles that they've actually put time and effort into making, and now your genAI puzzles are made from their stolen work (and also profited from though the subscriptions in your app).

on 23. May 2026, 16:41 by Laake
Not loving these computer generated puzzles, I agree with what the other comments have already said, but I've read your reply so want to just add on to that.

I think it is effortless spam, you're just telling the computer what you want and it outputs it for you. Sure, you have to filter it down a bit and I don't know your whole thought process, but are you really the setter of the puzzle? Can you really honestly say that you made this? I don't think so, an example I hear a lot is it's like ordering a takeaway and claiming you're a chef. It takes away from the beauty that is hand crafted puzzles.

You say it's harder than we think to generate good AI puzzles and tell us to give it a go, may I also request that you give setting a puzzle by yourself a go? The most versatile tool for this is sudokumaker.app, which should be fairly intuitive to pick up on. Start small with 4x4s like your AI has done here, see what cool stuff you can come up with yourself. For example, you could definitely have come up with the puzzle posted here by yourself. Including the purple borders if you so wanted.

Also I think there is a lot of differences between sudokumaker tools and AI generative tools. One is that sudokumaker still requires you to use the tools yourself to put it together.

Also, Gen AI just scrapes information from other people's puzzles, which is stealing from their hard work, as well as having a bit of a nasty impact on the environment.

on 23. May 2026, 16:21 by Brandy New
I get that not everyone likes computer-assisted puzzles, and that’s fine.

But I don’t really agree with the idea that this is just effortless spam. If it’s so easy to generate good puzzles with AI, I’d honestly invite people to try doing it themselves. Getting something that is actually valid, unique, interesting, and pleasant to solve still takes a lot of filtering, testing, and editing.

Also, using computer tools is not unusual in puzzle setting. Plenty of constructors use software to check uniqueness, test solves, search possibilities, or help add constraints. Of course, people can have different opinions about where the line should be, but I don’t think “computer-assisted” automatically means “low effort.”

on 23. May 2026, 15:54 by HeyItsErin
I strongly agree with TVDK here. There are people on this site that pour an incredible amount of effort and passion into constructing their puzzles, and to have generative AI puzzles shoehorned in amongst them is jarring. I understand this is what some people want, but you have an app for that. Please keep the puzzles on your app and find somewhere else to advertise it.

on 23. May 2026, 15:53 by CitrusGremlin
I also agree with TVDK.

on 23. May 2026, 15:11 by TVDK
I'm not a fan of this spam of daily computer (or generative AI) generated, low quality puzzles. The puzzles are clearly also on whatever genAI nonsense that "VariantDoku" is, so why do you feel the need to flood LMD with these generated puzzles?

Did people react too negatively to your previous puzzles, so you decided to no longer mention that it's made by a computer/genAI, and no longer use the "computer generated" tag (which you've only just stopped using)?

on 23. May 2026, 15:08 by BKKGarrett
I love these little puzzles! Keep making them, please! Thank you!

Difficulty:1
Rating:65 %
Solved:119 times
Observed:0 times
ID:000SZ2

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