Normal sudoku rules apply. Placing correct digits will clear the fog from surrounding cells. Digits in cages do not repeat, and sum to the small clue, if given. Pink strips (of at least 2 cells in length) are hidden in the fog. Digits in a vertical strip in column N indicate the column in which the digit N appears, in the corresponding row. Digits in a horizontal strip in row N indicate the row in which the digit N appears, in the corresponding column. For example, if r2c3 is in a horizontal strip, and contains a 7, then r7c3 contains a 2.