Rules:
Normal sudoku rules - Enter a digit from 1-9 in each cell without repeating in a row, column, or box.
German Whispers - Adjacent cells on a green line must contain digits that differ by at least 5.
Ratio Kropki - Black dots separate digits with a 1:2 ratio, i.e., one is double the other. Not all such relationships are indicated.
Play the puzzle on Sudokupad
I hope you enjoy the puzzle!
Solution code: Box 8
on 7. January 2026, 21:13 by Prezombie
this is a beautiful puzzle. I love it when the small breaks in symmetry are the key to breaking in, rather than endgame distinguishments.
on 2. January 2025, 01:39 by Frank Puzzles
https://youtu.be/KlL_iU4JaWc
Here's my solve of your puzzle. Loved the interaction between the black kropki dots and the german whisper lines!
on 24. September 2024, 13:39 by Snookerfan
Very nice! Thank you
on 24. September 2024, 05:11 by virus_dave
I agree w/ @wuc on this. The break in took me a bit of thought, but the only spot i really got stuck was once in the middle, otherwise everything flowed very very nicely. Thank you!
on 23. September 2024, 16:40 by wuc
Nice interactions. One big hurdle mid game to me. Not at all obvious. The rest flowed very nice. Great setting thx.
on 23. September 2024, 14:41 by Franjo
Approachable puzzle with elegant setting. Thank you for creating and sharing.
on 23. September 2024, 13:01 by GeorgeTheToad2
Very enjoyable. Thank you.
on 23. September 2024, 06:22 by rameshsrivats
Superb puzzle. Pleasure to solve.