Butterfly
- Kropki dots
- Thermometers
- Whisper lines
- Renban lines
- Palindromes
The brief
Normal sudoku rules apply.
Along thermometers, digits must increase from the bulb end.
Digits separated by a white dot must be consecutive. Not all dots are given.
Purple lines are Renban lines. Digits along a purple line are a set of consecutive, non-repeating digits in any order.
Green lines are German Whisper lines. Adjacent digits along a green line must differ by at least 5.
Yellow lines are palindromes and and must read the same in both directions.