Mostly Harmless: Zaphod Beeblebrox
(Published on 24. April 2026, 01:08 by AaronH)
Grab your towel… grab your electronic thumb… and let's hitchhike the galaxy again.
Mostly Harmless: Secondary Phase starts 4 September 2026 with Babel Fish.
"Zaphod Beeblebrox, the man who invented the Pan Galactic Gargle Blaster, ex‐confidence trickster, once described by Eccentrica Gallumbits as the Best Bang since the Big One, and recently voted the Worst Dressed Sentient Being in the Known Universe for the seventh time... has he got an answer this time? We asked his private brain care specialist Gag Halfrunt..." "Well, Zaphod's jist zis guy you know?" - The Hitch Hiker's Guide to the Galaxy
Rules
Normal sudoku rules apply: fill the grid with digits 1–9 so that no digit repeats in any row, column, or 3×3 box.
The Ten line is marked with Xs to distinguish it from the Palindrome, otherwise all variant clues follow their standard meanings; full descriptions are provided below.
- Dynamic Fog: The grid is covered with fog; entering correct digits may clear fog elsewhere, and no guessing is required. Any lines or markings continue and connect beneath fog. Unless revealed, no additional clues should be assumed to exist under the fog.
- Palindrome: Digits along a grey line read the same forwards and backwards.
- Zipper Line: Along a purple line, pairs of digits equidistant from each end of the line sum to the same value. If the line has an odd number of cells, the centre cell contains that sum. The dot marks the centre of the line.
- German Whispers: Along a green line, adjacent digits differ by at least 5.
- Ten Line: A grey line marked with Xs is divided into contiguous segments, the digits in each segment sum to 10. Segments do not overlap and their boundaries are not indicated, solvers must determine them.
- Entropic Line: Along a peach line, any three adjacent digits must include one low digit {1,2,3}, one medium digit {4,5,6}, and one high digit {7,8,9}.
- Parity Line: Along a red line, digits must alternate between odd and even.
- Killer Cages: Digits in a cage must sum to the number shown in the corner.
- Nabner Line: A yellow line cannot contain two digits anywhere on the line that are consecutive.
- Don’t Panic!: No guessing is required - you are one hoopy frood.
Primary Phase
- Fit the First - Mostly Harmless
- Fit the Second - Mostly Harmless: Know where your towel is
- Fit the Third - Mostly Harmless: Zaphod Beeblebrox <-- You are here
- Fit the Fourth - Mostly Harmless: Hyperspace Bypass
- Fit the Fifth - Mostly Harmless: Beware of the Leopard
- Fit the Sixth - Mostly Harmless: Heart of Gold
Secondary Phase airing later this year with Mostly Harmless: Babelfish...
Solution code: Row 6 - left to right
Comments
on 13. September 2026, 01:08 by davidz32z
Quite a step up in difficulty here, but I'm really loving this series!
on 4. September 2026, 21:15 by Hrothan
The links don't go to SudokuPad. They are 404 links on AaronH.net. I got the SudokuPad link from the description on the walkthrough video.
AaronH: Fixed. Apologies, a typo in my redirects. I use these now, so there's only one spot to update if the puzzle or rules get an update - as the sudokupad links don't get any updates. Thanks for letting me know :)
on 25. May 2026, 14:08 by itsid
just as Joozd I stared at the zipper line for way too long until I realised what it affects and is affected by.
Now I think I actually learned something... odd!
on 12. May 2026, 08:39 by Joozd
That one part in the middle took me a few hours of staring, apart from that it was smooth sailing
on 29. April 2026, 14:32 by AaronH
Added link to walkthrough
on 24. April 2026, 14:30 by drbs
This is a hard puzzle.
on 24. April 2026, 07:43 by VitP
this one is a LOT harder than the previous ones. the early part is easy, but then ...
well, after much searching, you can find the ONE cell that allows further progress (2), but it only helps a little bit.
