Logic Masters Deutschland e.V.

Lupin's Loop 3 - Successorless

(Published on 3. June 2026, 11:07 by Rab3aron)

Lupin's Loop 3
Successorless
Backstory
After Professor Lupin found the impossible space route, NASA’s scientists were left speechless. The expedition launched exactly as planned, and as a reward, Lupin was invited aboard.

But on the ringed planets, the crew discovered a terrifying truth: the aliens were far more advanced than humans, they had monitored Earth for centuries, and knew everything about us. Yet whenever Earth was mentioned, they hid behind a strange ciphered language.

Fortunately for Earth, Lupin came prepared. Hidden among his notebooks was a device that could record unknown signals and decode them later.

Back on Earth, the cipher revealed coordinates to an abandoned island hidden from every modern map. There, the crew found empty huts, alien symbols carved into the walls, and buried at the island’s center, the device the aliens had used to monitor Earth.

The truth was clear: the aliens had lived there thousands of years ago, and now they were trying to return and invade Earth.

To stop them, Lupin had to connect every hut with one cable, forming a closed energy loop. If completed, the loop would trigger a hidden bomb and destroy the monitoring system. If he failed, humanity’s final countdown would begin.
Rules

Normal Sudoku rules apply.

White Kropki Dots: Digits separated by a white Kropki dot are consecutive.

Electricity Cable: Draw a single electricity cable that travels orthogonally from cell to cell, never branching, crossing, or overlapping, and eventually closes into a loop. The loop must pass through every hut.

Rivers: Water drops mark river borders that the loop cannot cross.

Non-consecutive Along the Loop: Any two cells that are adjacent along the loop must contain non-consecutive digits, unless the loop is passing through a white Kropki dot, where consecutive digits may appear.

Huts: Any two huts directly connected by the loop form a segment, including both huts. A digit in a hut equals the length of the longest segment containing it.

Solve Online
This is the third puzzle in the Lupin’s Loop series, and I truly hope you enjoy solving it. I would be very happy to hear any feedback, thoughts, or comments you may have.

Solution code: Digits on the loop in Row 2 from left to right.


Solved by harry_anthony, mathics, Dr Logic, Dcs, JefferyJ, luna_vale, emoney1374, Vionix, Fusce, Reisen, waxy, redgecko, Malakree, 6yler, pippilotta, Fool on Hill, hollowpineapple, Elliebot, johncj, misha, ... Counterfeitly, madhupt, Joyofrandomness, karlmortenlunna, SKORP17, SSG, Elliott810, GoldenGod, dellC, jkuo7, stranac, P12345, cvil, Khatru, OJPS, Druselbert, mscha, jinkela114514, MikeMeech
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Comments

yesterday, 20:17 by mscha
Beautiful puzzle! Keep up the series, love it!

on 4. June 2026, 06:55 by rachiya
Very fun solve! Never tedious.

on 3. June 2026, 21:58 by johncj
Great puzzle! Felt like a Rat Run

on 3. June 2026, 18:58 by Vionix
Very beautiful construction thanks!

on 3. June 2026, 15:45 by emoney1374
So many steps in this puzzle feel unique in a way that’s an absolute joy to solve

on 3. June 2026, 14:06 by luna_vale
Great puzzle! Loving this series!

on 3. June 2026, 13:46 by Dcs
Really enjoying this series!

on 3. June 2026, 12:44 by Dr Logic
awesome!

on 3. June 2026, 12:35 by mathics
Very fun and smooth puzzle!

Difficulty:3
Rating:96 %
Solved:73 times
Observed:1 times
ID:000T45

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