Normal sudoku rules apply. Cells separated by a white dot must contain consecutive digits. Cells separated by a black dot must contain digits in a ratio of 1:2. Cells separated by a V must sum to 5. Cells separated by an X must sum to 10. No negative constraints apply. (eg a domino without a white dot/black dot/V/X could still contain consecutive digits/digits in a ratio of 1:2/sum to 5/sum to 10.)