r/sudoku

I just learned about this advanced strategy, and I was trying it out (i.e., applying it on every bivalue cells I see) until I discovered this. Am I doing it wrong?

I’m struggling because there’s only one 7 and one 9 :(

I’ve been putting together some Sudoku puzzles recently and wanted to get a sense of difficulty levels.

This one is meant to be “very easy” for complete beginners or just something relaxing to solve.

I’m curious — does this feel:
- Too easy
- About right for a beginner
- Or still a bit challenging?

Would appreciate any feedback 🙂

New to sudoku, what strategies to use from here?

hi everyone, pretty stumped on this puzzle, hence the mess. I would like to learn better sudoku but I have found myself stumped on this puzzle. if anyone has tips tom what to learn to progress this, help is greatly appreciated.

I feel like I often get to this point on the challenging apple news puzzles and I just have to guess a couple squares but I feel like there must be a way to solve this without guessing at all and I'm missing something.

I started to try to solve extreme sudokus. But at this one I am stuck. Can someone give a hint what the next thought to solve this would be?

I am working on a Python Generator as part of a college project. I tried to build a humanistic solver that appraises each puzzle logically and use that to determine difficulty levels, but its still a computer program and not a real human. They are all designed to have unique solutions and are rated from 1-5 based on difficulty. 5 is expert, 1 is beginner.

I would really appreciate it if you guys could let me know if these expert puzzles are as difficult as their names imply? I know there really isnt any "expert" difficulty for 4x4 and 6x6 but within those bands are they challenging enough to merit that tag? I'm also clueless with the 12 and 16 grids since solving even the intermediate ones are challenging enough for me that i cant tell if this is top tier expert difficulty or if they slot into an easier category. thanks!

I thought that in good puzzles this would destroy uniqueness. Why is this so

I got back into sudoku recently and I just wonder how to use helper grids that are that small. Can anyone help me please?

Thanks

Hello, everyone!

It’s my first time posting in this sub. I’ve come here looking for some guidance and tips on how to proceed when I’m stuck like this.

I have recently started doing sudokus again (never have done it “seriously” anyway) cause I got interested and I want to learn more :)

I could pick a “hint” (a single number) from the solutions in the back of the book and clear it mostly with all the notes I have written down already, but I would rather learn how to proceed on situations like the picture.

Any help is appreciated.

Thank you very much!

Can someone confirm if I did this right?

Yellow- Base / Floor

Green - Walls

Red- Tops

Eliminating 9s

I dont have any eliminations do I? To my understanding I can only eliminate 9s in column 2 Box 1 and column 1 box 7 (counting boxes left to right)

A user u/A110_renault pointed out on my last post a new way to find and solve skyscrapers, such that the floor / base can be weak and the walls need to be strong. Unfortunately that confused me even more.

I swear the only way to beat this is luck

I'm playing a geometry dash sudoku level and wrote it on paper to make it easier

Hey y'all. Ran into this puzzle on a daily solving app I use with some friends. It has a mode with no guardrails on the puzzle generation that locks you out of the puzzle if you make a single mistake of any kind, and it often puts out some real doozies that are just too far outside my abilities to finish within the hour or two I have a day to solve puzzles, and then the puzzle expires because the day rolls over. This was today's puzzle. I plugged it into yzf's solver and it showed these two moves that I don't really understand what it's showing me. The first move seems to have a cell that is shared by both ALSs, which I don't quite understand how that works/when it's allowed to use an overlapping cell in ALS-XZ like that. The second seems to have two RCCs which I only have a light grasp on, but is also eliminating the 6 in R4C5 and I don't understand why. And both have a chain/ring drawn over top that I don't know what it is communicating. If it's just showing that a ring exists, why is it included in both these moves specifically? And why would it not also eliminate the 5s in R8C67? Any help explaining how/why any of these work would be great!

Here's the puzzle string if you please - 040502000180004005000008790804000000050000010000000802071900000200400078000206040

And a Sudoku.coach link for anybody who wants it - https://sudoku.coach/en/play/040502000180004005000008790804000000050000010000000802071900000200400078000206040

(As a completely separate issue, does anybody know why this solver sometimes shows nice loops and other times AICs? Wouldn't it make more sense to only show AICs?)

I’m completely stuck on today’s hard puzzle from Washington Post. I tried to use sudoku solver as well and it said it can’t solve it so I assume it’s something pretty advanced. What am I missing?