Are only certain sites allowed? Can one post finished puzzles? I’m new to sudoku and am I interested in getting active with the community.

Teach me the next step

I am really trying not to guess, but have been stumped for a while here. I have cleared out a few impossible, but they weren't enough. Anyone can explain the next move?

EDIT: solved below!

Hey there! Could someone better at this game than me help me understand the hint I'm receiving? According to the hint, I can eliminate all 9s outside the rectangle, but I don't see why you can reach that conclusion. Any help?

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::: spoiler 41:28

I'm a little rusty and slow at 12 × 12

Playing: Libre Sudoku (F-Droid) :::

My wife got a new phone, and the sudoku app she had on her old one is no longer available. Do any of you have recommendations for an Android app that doesn't do ads during the game and can be played offline?

My understanding is a valid sudoku should have 1 unique solution. But in this one I just finished, the circled numbers seem to be interchangeable. Am I missing something?

French Dip — a Sudoku with thermometers and sandwiches, and a secret solution word to extract! My friend's first published Sudoku.

I typically get stuck around this point. I begin with penciling in which numbers pinky have two options per 3x3. If that dries up, I will try looking for numbers that can only go in one spot per row/column and squares that only allow 1 number.

Are there powerful techniques I'm skipping?

Not sure where to go from here. I'm still relatively new to suduko so are there any techniques I could use here?

Any hints appreciated

I am stuck on this puzzle. Any suggestions for how to move forward? Thank you.