This miniature puzzle should be a very easy solve... I hesitated to publish in case it was too easy for this site, but as I am currently going through and uploading all my old puzzles I thought I might as well include it for completeness!
Place the digits 0-5 such that each row, column and 2x2 box add to 10. Digits may not repeat in any column or 2x2 box. Each cell must either be greater than, or less than, any of its orthogonally adjacent cells. No digit may appear more than three times.
Sudokupad link: https://sudokupad.app/samjcovnry
Solution code: Row 4
on 28. May 2026, 02:29 by SanFranSam
It took me a while to figure out that the rule was a cell is either greater than all its neighbors or smaller than all of its neighbors. Orthogonal of course.
on 27. May 2026, 22:45 by Pairot
I think you should directly state digits may repeat on rows, instead of saying all the way in which they can't.
on 27. May 2026, 22:24 by dzamie
Pretty neat. There's plenty of easy puzzles on this site; I think the thing that holds this one back is that the rules aren't very intuitive, the "max 3 of any particular digit" especially.