Normal sudoku rules apply. The grid is covered in fog, placing a correct digit will clear the cells surrounding that cell. Digits on a purple renban line a set of consecutive digits in any order without any repeats. Digits in a dotted cage do not repeat. The cage shows its sum. Adjacent digits on a green German Whisper line differ by at least 5. A clue outside the grid sums the digits between the 1 and 9 in its respective row/column. Digits separated by a black dot have one digit double the other.