Logic Masters Deutschland e.V.

Stubborn Fog

(Published on 12. April 2025, 19:00 by ul-Rhymm)

Normal Sudoku: Place each digit, 1-9, exactly once in each row, column, and 3x3 region.

Stubborn Fog: The grid is covered with fog. Placing a correct digit removes the fog from that cell.

Dutch whispers: Digits connected by an orange line must have a difference of at least 4.

Arrows: Digits on an arrow (thin grey line) sum to the value in the connected circle. (All arrow sums are a single digit number.)

Quadruples: Digits in a quadruple circle must appear in the four adjoining cells. (All quadruples contain four digits, arranged in ascending order from top-left to bottom right.)

Maximum: Yellow shaded maximum cells are greater than each orthogonally adjacent cell.

Sudokupad Link

Solution code: Row 9, left to right.

Last changed on on 13. April 2025, 01:54

Solved by SKORP17, giladooshlon, ludvigr04, Babbelnde Bembel, kakstront, efnenu, Myreque, Targora, zeniko, Kversten, Sralser, davidemsa, Tank, kkli, killje, schnitzl, dogfarts, sanabas, aeusuke, thomamas, ... valiantlake, oskarjor, allama, Sparky, rkm_sts, Trisolis, bilms, JacekSudoku, QuiltyAsCharged, BlackApolloX, fca.felix.sudoku, ValeMK, dielilla, JoBerlin, greemi01, antzervos, Joyofrandomness
Full list

Comments

on 13. April 2025, 17:50 by Myfyr MJ
Nice challenging puzzle.

on 13. April 2025, 17:20 by Myfyr MJ
Nice challenging puzzle.

on 13. April 2025, 17:07 by dingledork
Gorgeous puzzle. Easy without being trivial. Thanks!

on 13. April 2025, 12:36 by nunc
Thanks for this nice puzzle!
I have a suggestion for the naming of the rule, though: Somewhere else it is called "dense fog", which I like much more. Of couse you can do as you like.

on 13. April 2025, 04:26 by larmoejr
Thank you for the puzzle!

on 13. April 2025, 01:54 by ul-Rhymm
Changed challenge rating

on 12. April 2025, 23:34 by Tank
That was fun! I would say 2 stars for difficulty

on 12. April 2025, 23:31 by ul-Rhymm
Changed challenge rating

on 12. April 2025, 23:17 by Sralser
Agree 1-2.

on 12. April 2025, 23:13 by Sralser
Agree 1-2.

Last changed on 12. April 2025, 22:32

on 12. April 2025, 22:32 by kakstront
Break in was not trivial (mainly because I missed the quadruple constraint). Everything after is pretty easy. 1-2 stars for me

on 12. April 2025, 21:38 by ul-Rhymm
Fixed Link

Last changed on 12. April 2025, 22:09

on 12. April 2025, 20:03 by Azure
Bro where is the link?

Sometimes, I am a fool. /ul-rhymm

Last changed on 12. April 2025, 23:30

on 12. April 2025, 19:09 by Killer-Ly
A link to solve it?

Oops! Fixed! /ul-rhymm

Last changed on 12. April 2025, 22:18

on 12. April 2025, 19:07 by larmoejr
I can't seem to find a link to the puzzle.

Thanks for pointing this out! My mistake. . . /ul-rhymm

Difficulty:2
Rating:91 %
Solved:146 times
Observed:6 times
ID:000MVL

Variant combination

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Solution code:

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