Normal sudoku rules apply. Cells separated by a black dot must contain digits in a ratio of 1:2 (ie one digit must be double the other). Cells separated by a white dot must contain consecutive digits. Not all possible dots are given. Cages are “Schrödinger cells” ie they contain one of 2 values. After filling all regular cells with digits, all Schrödinger cells must remain unresolved (in other words, both values of every Schrödinger cell must allow for a valid sudoku solution). The quantum balance of the universe is safe with this sudoku. Cats are safe too.