Smoke Rings
(Published on 24. April 2026, 14:00 by Sudokujoker)
I'm currently catching up on uploading puzzles I've previously designed; this is the second puzzle I created, back in June 2025.
Normal sudoku rules apply: place the digits 1-9 once each in every row, column, and 3x3 box.
Dynamic fog: the grid is covered in fog. Correctly entering a digit will clear the fog from that cell and may also clear the fog from other cells.
Primal kropki: Cells joined by a black dot are in a 1:2 ratio. Cells joined by a white dot are consecutive. Cells joined by a purple dot are either both prime numbers, or neither are prime numbers. Not all dots are necessarily given.
Sudokupad link: sudokupad.app/ps2bmb7e14
Solution code: Row 9
Comments
on 27. April 2026, 16:50 by Karitsu
Finished quicker than most 1* puzzles, but still giving a 2* rating as I think it does force you to slow down a bit and think. Really enjoyed this! Should have been obvious to utilize Phistomefel, but didn’t end up using that logic in my solve - probably would have made it even quicker. Anyway, this was an awesome puzzle. @Sudokujoker, you’re well on your way to becoming one of my new favorite setters!!
on 26. April 2026, 02:25 by Sudokujoker
Edit: Adding keywords
on 25. April 2026, 23:40 by Sudokujoker
Thanks to everyone for the ratings/kind comments! @Tobias - part of my design process in this puzzle was that I wanted to do something fun with the Phistomefel ring :)
on 25. April 2026, 19:41 by Tobias
Nice puzzle, was even able to use the Phistomefel Ring! :)
on 24. April 2026, 23:29 by baltoguy
Wow. Requires patience. But once you get it, you get it.
on 24. April 2026, 17:03 by Ragna
That is a very interesting ruleset. Fun puzzle! Thank you. :-)
