Normal sudoku rules apply: Place the digits 1-9 in every row, column and box exactly once each. Digits in a dashed cage must sum to the value in the top left corner of the cage (if given). Digits may not repeat within their own cage. Nori Nori Christmas: Shade exactly two cells in each cage. Each shaded area forms a domino (cookie), not necessarily within a cage. Shaded dominoes may touch diagonally, but not orthogonally. A shaded domino functions as a black Kropki dot, i.e. digits in a shaded domino are in a ratio of 2:1. It is possible for unshaded dominoes to be in a 2:1 ratio. Digits separated by a white sugar decoration dot are consecutive. Not all possible dots are given. Additionally the grid is partially covered in fog. Placing correct digits will clear the fog from surrounding cells, possibly revealing more clues.