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 was chosen as it increases the killer combinations, so I am sticking to it.
Each other number is missing from one and only one nonet, row and column.
SemiSymmetric: there are five unknown pairs of numbers.
Opposite each cell number: the opposing number is itself or its partner.
As a matter of style opposite cells must not contain vanilla clues (unless they are the same number).
Row 5, column 5 and nonet 5 should not contain clues. In this one I was forced by uniqueness to put clues there.
Probably hard for a first one, I think about 0.8 on the assassin scale.
