r/sudoku

I really want to get better at sudoku but can't seem to see anything past a certain point, I can only do basic techniques most complicated I can do is sometimes spot an XY wing or a deadly rectangle, I mostly just go off vibes but I want to learn more techniques. Could someone please help me get unstuck here for example

We have been staring at each other for about half hour with no clue, i refused to use hints but i couldn't, any tips that can help me improve in soduko?

Hi guys,

I really love sodoku, but lately I've found myself stuck like this many times. How can you solve it?

Or did I make a mistake somewhere 😭

i’m trying to create a sudoku solving program and the program thinks it found a “y-wing” logic rule with a 5-9 leg between the yellow and red circle and a 6-9 leg between the red and blue circle that concludes that the red circle must be a 9(i’m not sure the correct terms for this logic rule because it seems very obscure).

the problem is that depending on the order of the other checks my program makes to find solutions, the y-wing rule becomes invalid and the program stalls from not finding solutions, i cant tell if that means i designed the program wrong and it just got lucky with guessing the correct location for the 9 using incorrect logic, or if the other check is programmed wrong.(these are my two most temperamental checks lol, everything else is very reliable)

It's the only block with 3 numbers both vertically and horizontally.

I'm trying to do the Sudoku Vania and right now I'm just switching between the different areas trying to find something I can use. The area I haven't really worked on a lot other then the basics (ya I know my pencil marks are messy) is this area with a constraint I've never seen before in Sudoku. The Scary Peepers.

I showed the rules and drew on row 3 to show how it works but basically you look at the number in the eye and count each digit in the direction the arrow points unless the digit is adjacent to a number larger then it.

I just wanted to ask for help on how this constraint and how I can use them to get some more digits. I am a overall novice player and don't really know any of the advanced Sudoku techniques, so if there is something obvious I'm missing forgive me.

I usually play on sudoku.com and encountered this puzzle. I was able to spot lots of matching pairs (doubles) and a triple, and I also tried searching for XY Wings, but ultimately wasn't able to see any path forward so I used a Hint.

Usually the hint will explain the logic behind the answer however this time it simply filled in the number 4 in the highlighted square (r5c2). No explanation was given.

Can someone explain why that square must be a 4?

Alternatively, if I hadn't used the Hint, what technique/logic should I have applied to figure out the next step on my own?

I love learning and be able to improve my game so any help is greatly appreciated. Thank you in advance!

Unable to move further please help. Is there any website where I can generate answers for the random sudokus I try to solve

Can someone please explain to me why r1c1 and r1c6 is considered a weak link and not a strong one? Is the 4 not both a bi-value and bi-local?

tried out this resturant for takeaway for the first and a, I- who thought this is how sudoku works (I'm losing it bruuh 😀😀)

(Spoiler: comments below have solved it soo, don't scroll past here if ya wanna DIY first typeshii)

I think there’s a variant of unique rectangle but I don’t know about it

I did solve it. I just wanted to see what techniques other people would use;) and thank you