Normal sudoku rules apply. Cells separated by a white heart have a difference of less than 3. Cells separated by a black heart have a ratio of less than 3. (The larger number divided by the smaller number yields a number of less than 3).
Normal sudoku rules apply. Cells separated by a white heart have a difference of less than 3. Cells separated by a black heart have a ratio of less than 3. (The larger number divided by the smaller number yields a number of less than 3).