The Secret Sudoku Cell
- Kropki dots
- Region sum lines
The brief
Sudoku rules mostly don't apply.
Fill the grid with the digits 1-6, but each row, column and box must have exactly one repeated digit (and one digit missing). With the following exception:
One cell in the grid is the Secret Sudoku Cell, to be located. The row, column and box containing the Secret Sudoku Cell must each obey normal sudoku rules (ie; contain no repeating digits), and indeed be the ONLY row, column and box where sudoku rules apply.
REGION SUM LINES: Box borders divide blue lines into segments that have the same sum.
ZIPPER LINES: Digits an equal distance from the central spot on a lavender line sum to the digit on the central spot.
BLACK DOTS: Digits separated by a black dot have a 1:2 ratio.
WHITE DOTS: Digits separated by a white dot are consecutive.