Normal sudoku rules apply. In cages, digits must sum to the small clue in the top left corner of the cage. Digits cannot repeat within a cage. The cages themselves must be deduced; each cage contains a "renban" that spans ALL of its cells. The line must start at the killer cage sum clue and move horizontally and vertically through cells (but not diagonally). The line must not branch. NB As usual, the killer cage total must always be in the upper left corner of the cage (uppermost prioritised over leftmost). Cells connected by a "renban" line must contain consecutive digits in any order. Cages may not overlap.