What Does It Mean?
- Region sum lines
- Renban lines
The brief
- Normal Sudoku rules apply, i.e. each row, column, and 3x3 region has to contain the digits from 1 to 9 once each.
- Renban: Each purple line must contain a set of consecutive non-repeating digits in any order.
- Region Sum Lines: Box borders divide the blue lines into segments with the same sum. (Different lines may have different sums.)