Logic Masters Deutschland e.V.

Quads Workout

(Published on 22. February 2026, 02:30 by juggler)

Click on the puzzle image to play

Normal Sudoku rules apply.

QUADSUMS - Write a two digit number in each large circle. The four cells surrounding it contain these digits, and also sum to that two digit number.

KROPKI - Digits separated by a white dot are consecutive.

See also

Solution code: Row 2

Last changed on on 22. February 2026, 04:10

Solved by Manta-Ray, Andrewsarchus, Blake Saligia, vitaminz, Aidan488, tuturitu, zeniko, Piff, eladv, Yawnus, Fool on Hill, totem_mapr, Myxo, Bravissimo, Crul, Jesper, beansontoast_, emoney1374, SKORP17, ... Elliott810, Andrewmi3, Atticus837, slamwich, NEWS, Krisonium, Fenn, Neumino, QuiltyAsCharged, dorverbin, SZCrow, smckinley, mathpesto, Scojo, Flinty, ThePedallingPianist, Crusader175, fkib
Full list

Comments

yesterday, 11:36 by VitP
solves quite easily using basic sudoku, and basic logic --> level 2.

all you need to do is solve the equation
A + B + C + D = 10*A + B ,
which has exactly TWO TYPES of solutions.

on 24. February 2026, 02:24 by QuiltyAsCharged
Very nice! Easy to make mistakes initially, at least for me. But it becomes easier to solve once you think about it the right way

on 23. February 2026, 01:36 by Elliott810
Brilliant puzzle with fascinating logic! Thank you:)

on 22. February 2026, 15:45 by Myxo
Lovely!

on 22. February 2026, 12:26 by eladv
Thank you, this was beautiful!!

on 22. February 2026, 06:08 by vitaminz
Quite a lovely execution. The big circles had some very surprising properties!

Difficulty:3
Rating:95 %
Solved:41 times
Observed:1 times
ID:000RKQ

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Solution code:

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