Hi everyone! I wanted to make a sudoku puzzle which relates to a math theorem called the Triangle Inequality. It states that a triangle with side lengths {x,y,z} can be formed if and only if x+y>z, y+z>x, and z+x>y. Thanks to Kyunitar, SennyK, Cassinii, and many others for testing. I hope you enjoy the puzzle!
Rules:Normal sudoku rules apply.
TRIANGLE INEQUALITY LINES: all digits are distinct on a red line. Furthermore, any three distinct digits {x,y,z} on a red line satisfy the Triangle Inequality: x+y>z, y+z>x, and z+x>y.
GERMAN WHISPER LINES: adjacent digits on a green line have a difference of at least 5.
INEQUALITY SIGNS: an inequality sign points to the smaller of the two digits it sits between.
DYNAMIC FOG: entering a correct digit clears fog in its cell, and may or may not clear fog in other cells.
Lösungscode: Digits in row 9
am 13. März 2026, 17:54 Uhr von TMNF
I loved it, really amazing
Thank you
am 13. März 2026, 14:34 Uhr von Flinty
Very nice :)
am 13. März 2026, 08:55 Uhr von WvdWest
Nice new constraint. Once you comprehend the working of it, makes it a fluid solve.
am 12. März 2026, 19:20 Uhr von wunder108
Very nice puzzle! Thanks for sharing
am 12. März 2026, 19:14 Uhr von dzamie
Oh that's neat! I often see stuff like this with the restriction focused on *adjacent* digits, so having it restrict *any* set of three brought a different mode of logic around.
am 12. März 2026, 16:48 Uhr von SennyK
Very fun puzzle with clever interactions, nicely done! :-)
| Schwierigkeit: | ![]() |
| Bewertung: | 93 % |
| Gelöst: | 58 mal |
| Beobachtet: | 5 mal |
| ID: | 000RV1 |