Normal sudoku rules apply. Digits may not repeat along the indicated diagonal. Numbers outside the grid are simultaneously full rank clues and sandwich clues. A '?' can be any number. Full rank Each complete row and column can be read from both directions to form 36 distinct 9-digit numbers. The clues outside the grid give the rank of the 9-digit number read from that position when all the numbers are ranked from smallest (1) to highest (36). Sandwich: A number outside the grid represents the sum of the digits sandwiched between the '1' and '9' in its respective row or column.
If you prefer to play directly in sudokupad then click below.
