This sudoku solves like a normal one, plus keep in mind that all the four digit numbers in the dashed rectangles can be expressed in the form n * X where n is a variable integer and X is a common three digit prime, and they are all different.
Solution code: The diagonal NW-ES, then the 4th row
on 10. August 2018, 15:29 by DarkBeamIta
This sudoku has already been tested for solution unicity :P
I liked the concept of adding some calculus to sudoku here
on 10. August 2018, 13:03 by Luigi
Oh! Danke, das erklärt einiges...
on 10. August 2018, 09:52 by ibag
@Luigi: Es wird immer die gleiche dreistellige Primzahl verwendet, aber die Vielfachen in den roten Kästen sind alle verschieden.
on 10. August 2018, 08:59 by Luigi
Was bedeutet hier alle sind verschieden?
Sind alle Primzahlen verschieden oder gar alle Faktoren verschieden?