German Whispers: digits along each green line have a difference of at least 5 to their neighbor(s).
Friendship line: digits along the red line have a difference of at least 1, but at most 2 to their neighbor(s).
Renban: digits on the purple line form a group of consecutive digits in any order.
Thermometer: digits increase, starting from the bulb.
Kropki: digits separated by a black dot have a ratio of 1:2. Digits separated by a white dot are consecutive. Not all possible dots are given.
Sudokupad: Link to Sudokupad
F-Puzzles-Link: F-Puzzles link
PS: If you like this puzzle, have a look at my other Sudokus with month titles:
Solution code: the right column
on 3. August 2025, 05:37 by Ganbatte
Enjoyed the logic of this puzzle. Thank you!
on 1. August 2025, 17:35 by VitP
german renbans are lila or rosa, depending on how you feel
on 1. August 2025, 11:22 by Ragna
Fun puzzle! Super flow. Nice design. Thank you. :-)
on 1. August 2025, 09:57 by drolli38
Happy August! Great puzzle, thanks for setting
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