A Square Odd & Even Ring
- Killer cages
- Kropki dots
- XV and number dots
- Odd and even cells
The brief
- Normal Sudoku rules apply.
- Cells with a filled grey square must be even.
- Cells with a filled grey circle must be odd.
- Digits in a cage do not repeat and sum to the clue in the top left if given.
- Adjacent cells connected with an X must sum to 10.
- A black dot between cells indicates cell values with a 2:1 ratio. A white dot between cells indicates cells with consecutive values. Not all dots are given.