Normal sudoku rules apply. Digits in a Quadruple circle must be placed at least once in the four cells touching that circle. Digits on a Region Sum Line have an equal sum within each box that the line passes through.
Normal sudoku rules apply. Digits in a Quadruple circle must be placed at least once in the four cells touching that circle. Digits on a Region Sum Line have an equal sum within each box that the line passes through.