Logic Masters Deutschland e.V.

Stumbling Through the Fog

(Published on 14. September 2026, 07:57 by lgastako)

Here's my latest fog puzzle. These are a bit trickier for me in terms of making them fun but I liked enough of the logic in this one that I thought it was worth sharing. As always, feedback is welcomed an encouraged.

  • Normal Sudoku Rules: Fill each row, column, and 3x3 box with the digits 1-9 once each.
  • Fog: Parts of the board are initially hidden. Entering correct digits will clear the fog in surrounding cells. No guessing is necessary.
  • German Whispers: Along green lines, digits must differ from their neighbors by at least 5.
  • Renban: Purple lines contain a non-repeating set of consecutive digits in any order.
  • Killer Cages: Digits in cages must not repeat and must sum to the number in the upper left corner of the cage (if present).
  • White Kropkis/Black Kropkis: Digits in cells separated by a white dot are consecutive. Digits in cells separated by a black dot have a 1:2 ratio.
  • There is at least one "3 in the corner" (of the board) in this puzzle.

Play online using Sudokupad

Solution code: Row 3 from left to right.

Last changed on on 14. September 2026, 14:06

Solved by gdc, Dean, phono, maglia, marcmees, IvoryLinnie, Saltensity, RadchenkoAleksandr, jkuo7, Mozart40, anton_anton, MartinR, flaemmchen, gladstone, Jayem, abs, Blummy, falcoo, XhcnoirX, dielilla, ... das, Harold, H.I. McDunnough, outfromshadows, seyunifang, busby, ebulku, filz, antzervos, Liverpool98, Phandor, koiking, Sarhik, Montikulum, thedeanster, doodManBro, isajo4002, Zenryo, bereolosp
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Comments

on 15. September 2026, 00:47 by Stabbers
That's three in the spot-light.

on 14. September 2026, 18:25 by DarrenBurnett
That's three in the corner.

on 14. September 2026, 14:06 by lgastako
Added missing German Whisper rule.

on 14. September 2026, 11:56 by CortexVortex
Lucky, I reread the rules or I would be stuck in a deadly pattern!
I also assumed green was German Whispers! Nice puzzle, thank you.

on 14. September 2026, 10:47 by falcoo
Very fun puzzle! but you forgot to add the german whispers rule to the explanation so that did have me confused in the beginning

Difficulty:1
Rating:87 %
Solved:179 times
Observed:0 times
ID:000UKR

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Solution code:

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