Logic Masters Deutschland e.V.

x+y>z (Dynamic Fog)

(Eingestellt am 12. März 2026, 16:44 Uhr von Hanks)

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.

Solve online

Lösungscode: Digits in row 9


Gelöst von SennyK, anton_anton, 3ColorTheorem, dzamie, wunder108, kublai, Prepared Jester, Smartacus, SKORP17, Uhu, Adrian71, ole-1995a, Mattisahuman, L00ping007, BakersDozenBagels, abihummel, kehan628, ... ValeMK, schnitzl, PhrygianFinite, harwiltz, Elizy, Crabbsy Malone, Yahhavp, greemi01, 007_puzzler, Eulchen 1965, TheTrueSMOrc, hearnicane, illegel, macmillan333, zeniko, neica, Akko, MaxSmartable
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Kommentare

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:2
Bewertung:93 %
Gelöst:58 mal
Beobachtet:5 mal
ID:000RV1

Lösung abgeben

Lösungscode:

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