Digits (1-9) may not repeat in any row, column, region or cage. Digits on a purple (renban) line must form a non-repeating consecutive set (in any order). A white dot between cells shows they contain consecutive digits, and a black dot between cells indicates that one is double the other - all black dots ON LINES are shown. The 'K' cell may NOT contain a prime factor of 700,000 (2, 5 or 7).