The same rules as for Rainbow Killer 4
Rainbow as in "All the numbers in the rainbow"
The numbers are from 0-9
There is a zero in every nonet, row and column. Zero is chosen as it increases the killer combinations.
Each other number is missing from one and only one nonet, row and column.
This one is paper solvable - perhaps without pencil marks - probably 0.6 on the assassin scale. I thought I would put up an easier one for people to start with.
