Normal sudoku rules apply. The sum of the digits on a line within a particular 3x3 box must be the same for all of the 3x3 boxes the line passes through. eg r9c5+r8c6 = r7c7 = r6c8+r5c9
Normal sudoku rules apply. The sum of the digits on a line within a particular 3x3 box must be the same for all of the 3x3 boxes the line passes through. eg r9c5+r8c6 = r7c7 = r6c8+r5c9