a+b<=c (Dynamic Fog)
(Published on 17. March 2026, 05:29 by Hanks)
Probably my favorite puzzle I have set so far!
Following my previous puzzle which relates to the Triangle Inequality in math, this time I made a puzzle with the opposite constraint (see below). I am really proud of this one, and I hope you enjoy the puzzle! Thanks to Dillon Hanson, Plostoni, Cameron, Kyunitar, and many others for testing.
Rules:Normal sudoku rules apply.
ANTI-TRIANGLE LINES: for any three distinct digits {a,b,c} on a green line, the sum of the two smaller digits in {a,b,c} is less than or equal to the largest digit in {a,b,c}.
ARROWS: digits on an arrow sum to the digit in the attached circle.
DYNAMIC FOG: entering a correct digit clears fog in its cell, and may or may not clear fog in other cells.
Solution code: Digits in column 5
Comments
on 9. April 2026, 16:53 by QuiltyAsCharged
Very nice with some rather unique challenges!
on 31. March 2026, 18:55 by FullHouse07
That was a bit difficult for me but i really enjoyed.
on 20. March 2026, 21:10 by dzamie
Benefits greatly from a notepad open on the side. I particularly enjoyed the last set of green lines revealed!
on 18. March 2026, 08:04 by zeniko
I liked figuring out the implications of this fresh line type. After that, the puzzle solved nicely. Thanks for sharing.
