Logic Masters Deutschland e.V.

Five Squared (X-sums chaos construction)

(Published on 13. February 2026, 16:26 by Lizzy01)

Does anyone have a guess what the 25's and the 12's stand for, I wonder?

Rules:
Normal chaos construction sudoku rules apply.
Clues are X-sums: the first X digits in the corresponding row/column from that side add to the clue, where X is the first of those digits. Those X digits are also all in the same region, and the next digit afterwards is in a different region.

Play here.

Solution code: row 2


Solved by h5663454, marcmees, Piff, sehringdipity, Starlight, ArtsiBurger, tangobunni, QuiltyAsCharged, madhupt, wenchang, jhrdina, SKORP17, Jesper, tryote, Down Atroc1ous, cdwg2000, by81996672, BeeBoi, ... ch1983, smckinley, Kräuterbutter, MountBecton, Counterfeitly, halakani, JuiceGoneWild, coolguy14, Kino, cam, block_guardian, Thebodfather, Bootenks, Tacosian, PuzzlePatzer, irq, zakkai, pepe74287
Full list

Comments

on 14. February 2026, 10:38 by Tank
FYI the puzzle is solvable with a unique solution if the clue on the bottom of column 4 is a 28 instead of 26. I figured that out after I solved the puzzle in 45 minutes and my solution code was wrong. Lol I read the clue incorrectly the whole time

Last changed on 13. February 2026, 21:16

on 13. February 2026, 20:17 by QuiltyAsCharged
This has a really nice flow to it! The X-Sums interact in most interesting ways.

--Thanks!

Last changed on 13. February 2026, 21:16

on 13. February 2026, 17:24 by Bankey
12 days of X-mas ?

--Nope!

Difficulty:3
Rating:95 %
Solved:84 times
Observed:0 times
ID:000RG0

Online solving tool

Enter solution

Solution code:

Login