Symbiosis
- Kropki dots
The brief
- Normal sudoku rules apply.
- Digits on a blue line must have the same total within each 3x3 box.
- A black dot separates two digits that have a 1:2 ratio (one is double the other.) Not all possible black dots are given.
- A digit in a yellow circle indicates exactly how many red circles contain that digit.
- A digit in a red circle indicates exactly how many yellow circles DO NOT contain that digit.