Wishing Well
Rules:
- Classic Sudoku:
Every row, column and 3x3 box must contain every number from 1 to 9.
- Renban:
All digits along a purple line must form a consecutive sequence (in no specific order).
- Quadruple Circles:
Digits inside a white circle appear in at least one of the four cells surrounding that circle (if a digit repeats in a circle, it appears in two of the surrounding cells).
Play it online in SudokuPad.
This puzzle is also on Logic Masters Germany.