Logic Masters Deutschland e.V.

"Many men of course became extremely rich, but this was perfectly natural and nothing to be ashamed of because no one was really poor - at least no one worth speaking of. And thus were created the conditions for a staggering new form of specialist industry: custom-made luxury planet building. The home of this industry was the planet Magrathea."

Rules

• Sudoku: Fill the grid with digits 1-9 so that no digit repeats in any row, column or 3×3 box.
• Dynamic Fog: The grid is covered with fog; entering correct digits may clear fog elsewhere, and no guessing is required. Any visible line segments and partial markings continue and connect beneath the fog. Unless revealed, no extra clues should be assumed to exist under the fog.

• The Ultimate Question Mark: Digits separated by a question mark multiply to 42.

All following variant clues use their standard meanings - full descriptions are provided below.

• Region Sum Lines: Box borders divide a blue line into segments each with the same sum.
• Ten Lines: A grey line 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.
• Killer Cages: digits in cages must sum to the number shown in the top corner.
• V sums: A V connects two digits that sum to 5.
• Nabner: Along a yellow line, no two digits anywhere on the line may be consecutive or the same.
• Modular Lines: Along a teal line, any three adjacent digits must include one digit from each of the modulo‑3 sets {1,4,7}, {2,5,8}, and {3,6,9}.
• Black Dots: A black dot connects two digits where one is exactly double the other.
• Don’t Panic!: No guessing is required - you are one hoopy frood.

Cheers heaps to Kyunitar, Nico and FIT7Y for their early testing and feedback.

▶️ Walkthrough video coming soon

Other Puzzles

If you enjoyed this, feel free to check out some of my other puzzles:

• Mostly Harmless: Primary Phase
  • Fit the First - Mostly Harmless
  • Fit the Second - Mostly Harmless: Know where your towel is
  • Fit the Third - Mostly Harmless: Zaphod Beeblebrox
  • Fit the Forth - Mostly Harmless: Hyperspace Bypass
  • Fit the Fifth - Mostly Harmless: Beware of the Leopard
  • Fit the Sixth - Mostly Harmless: Heart of Gold
• Mostly Harmless: Secondary Phase
  • Fit the Seventh - Mostly Harmless: Babel Fish
  • Fit the Eighth - Mostly Harmless: Western Spiral Arm
  • Fit the Ninth - Mostly Harmless: Oh No, Not Again!
  • Fit the Tenth - Mostly Harmless: Paranoid Android
  • Fit the Eleventh - Mostly Harmless: Magrathea <-- You are here
  • Fit the Twelfth - Almost releasing 2026-10-09
• Even more at AaronH.net/sudoku