Sequential Sums
- Killer cages
- Diagonals
The brief
Normal sudoku rules apply. Digits in the same relative position must contain distinct digits in each 3x3 box. If, for example, R1C1 contains a 5 neither R4C4, R4C7, R7C4 or R7C7 may contain a 5. Digits in a cage do not repeat and sum to the clue in the top left. On the negative main diagonal digits do not repeat.