Logic Masters Deutschland e.V.

Thermos in the Fog

(Published on 1. October 2026, 00:08 by Nelyn)

SUDOKU VARIANT

THERMOS IN THE FOG
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Rules

Normal Sudoku

Normal Sudoku rules apply.

Region Sum Thermos

For each blue thermometer, digits on a thermometer have an equal sum N within each box it passes through, and digits must increase from the bulb to the end. Each thermos goes through at least 1 border or travel point.

Travel Points

The thermos can travel in the grid through red diamonds marked with letters. A thermo entering travel point A exits at the other travel point A.

A travel point is a cut into segments for the Region Sum Thermo.

Two cells separated by a travel point must sum to 10. (not the entering and exiting digits but the two cells surrounding a travel point)

Lockout Line

Digits along a black lockout line must not be between the digits on the circled ends of the line, which have a difference of at least 4.

Kropki

Cells separated by a white dot must be consecutive.

Dynamic Fog

Some cells are covered by fog. Placing correct digits may or may not reveal cells.

You are allowed to place digits in the fog.

▶ PLAY
A warm thanks to Suntanman3 - Ben for testing the puzzle !

Solution code: Column 1 top to bottom

Last changed on on 1. October 2026, 08:40

Solved by Suntanman3 - Ben, marcmees, jalebc, Terrapin, aleksav, by81996672, RebelSystem, kublai, RadchenkoAleksandr, PippoForte, Dendr, SKORP17, whtshername, Myfyr MJ, WvdWest, Saltensity
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Comments

on 1. October 2026, 23:47 by Myfyr MJ
Nice but I found this very hard. Completed using 2 unique rectangles.

on 1. October 2026, 08:45 by aleksav
Excellent puzzle! The logic was lovely, and each step was satisfying. Thanks :)

on 1. October 2026, 08:40 by Nelyn
Precising the rules

on 1. October 2026, 03:45 by Suntanman3 - Ben
A comfortable tough puzzle that gave a fresh twist to some classic restrictions!

Difficulty:4
Rating:75 %
Solved:16 times
Observed:1 times
ID:000V9I

Variant combination Online solving tool

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Solution code:

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