German Engineering (Duality)
(Published on 28. November 2022, 08:37 by starwarigami)
The red lines are both Product-Sum Lines and German Whisper Lines
- Digits along a line sum to the product of the digits in the two connected squares.
- Consecutive digits along a line must differ by at least 5, including the digits in the two connected squares.
- Digits may repeat on a line if permitted by other rules.
f-puzzles link
If you enjoyed this puzzle, please check out the previous puzzles in this series You may also like these related puzzles by other setters
Solution code: Row 5 (left to right) Column 5 (top to bottom) - 18 digits, no spaces
Comments
on 29. November 2022, 01:07 by ThePedallingPianist
Lovely puzzle! My dad and I were wondering if the algebraic factorisation on the top row was intended? We enjoyed that very much! I've just released a puzzle with dual rules lines too - it definitely has potential! :)
on 28. November 2022, 10:18 by Puzzlers100
I spent a third of the time on it just figuring out how the rules interacted with each other. After ghrasping that, it was an excellent solve.
on 28. November 2022, 10:01 by Chelo
Very nice setting @starwarigami, I had much fun in solving it. The flow is fully logical and very smooth!..
on 28. November 2022, 09:08 by starwarigami
Fixed copy and paste error in the html description
