Logic Masters Deutschland e.V.

Countdown to 2026

(Published yesterday, 23:59 by WEBthe3rd)

Rules:

Normal sudoku rules apply.

Note: All lines have a maximum length of 4 cells.

Dynamic fog - The grid is covered in fog. A correctly placed digit will clear any fog in that cell, and potentially in other cells as well. No guessing is required.

Sandwich Sums - Digits outside the grid indicate the sum of the digits found between the 1 and the 9 in the indicated row or column.

Anti-Kropki - Digits separated by a red ❌ are not consecutive and are not in a 1:2 ratio.

German Whisper - Digits along a green line must differ from their neighbors by at least 5.

Parity Lines - Digits along a red line must alternate between even and odd.

Renban Lines - Digits along a pink line must form a consecutive, non-repeating set in any order.

Region Sum Lines - Digits along a blue line are divided into segments with equal sums by the box boundaries.

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Colorblind-friendly version

Solution code: Column 9 from top to bottom


Solved by idanz, gdc, StevenS, Majesteit, sujoyku, ranhothchord, GorgeousNicko, BeniiPlayZ, houellebecqqq, Greg, War, tjmas, Montinox, rictech, klizun, JayBird, thomamas, cmigas, Dermerlin, SennyK, Nexys6969, FireTruckFuel, cdfergus0960, Kirk Fogg, allama, doomedmageknight, proredfly, casseena, Elizy
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Comments

today, 04:12 by SennyK
Great puzzle idea and beautiful execution, I do not understand why this is rated so low. Deserves higher rating. Happy New Year!

today, 02:48 by War
Hey Russ, this is very solvable. A few tips:
Start with the sandwich sums, then there will be a GW forced digit. Then another GW digit will play with the sandwich in column 3 and you have broken in the puzzle. The thing to remember from here is that every line has a max length of 4, which is necessary to solve the renbans that follow.

today, 02:15 by RussKozerski
Is this solvable? I've never struggled so much with a 1-star puzzle.

Difficulty:1
Rating:84 %
Solved:29 times
Observed:0 times
ID:000QS4

Puzzle variant New

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Solution code:

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