Mysterious couple
- Kropki dots
- XV and number dots
The brief
Normal Sudoku rules apply. Digits in a killer cage do not repeat and sum to the clue in the top left. Each cage in the grid has either the total X or Y which have to be determined by the solver. Digits joined by an X sum to 10. (Not all X are given.) Digits joined by a black dot have a 1:2 ratio. (Not all dots are given.)