Primetime 01: Good Primes
(Published on 17. November 2025, 01:47 by Markus)
Rules:
1. Normal Sudoku rules apply.
2. Primes see the digit 1 at least once in distance of their value in any direction, if allowed by the size of the grid. Some are marked with a circle.
3. Some "good" primes are marked with a green cell. Additionally any multiple of its value in any distance away sees a cell, which includes a multiple of itself or the digit 1.
4. Digits on a green german whisper line differ at least by 5.
Have fun!
Examples:
R2C2 is good prime and sees at least one 1. R5C3 is prime and sees at least one 1. R7C4 is likely to be 5, but careful this cell can be 2 and 7 aswell. R6C6 does not see a 1 and that is allowed.
1. Normal Sudoku rules apply.
2. Primes see the digit 1 at least once in distance of their value in any direction, if allowed by the size of the grid. Some are marked with a circle.
3. Some "good" primes are marked with a green cell. Additionally any multiple of its value in any distance away sees a cell, which includes a multiple of itself or the digit 1.
4. Digits on a green german whisper line differ at least by 5.
Examples:
R2C2 is good prime and sees at least one 1. R5C3 is prime and sees at least one 1. R7C4 is likely to be 5, but careful this cell can be 2 and 7 aswell. R6C6 does not see a 1 and that is allowed.
Solution code: Row 7
Last changed on on 3. December 2025, 19:19
Solved by Clara123, War, SKORP17, SPring, zuzanina
Comments
on 3. December 2025, 19:19 by Markus
Removing german version
on 17. November 2025, 18:29 by Markus
Small change on the wording on good primes. Hint by War
on 17. November 2025, 11:00 by Markus
Adding image with examples. Erweiterung mit einem Beispiels-Bild.
