Normal sudoku rules apply. In the final grid all clues need to be wrong. A clue is wrong when the placed digits cause it to be invalid. Placing digits that successfully make clues invalid will help clearing the fog from surrounding cells, possibly revealing more nonsense (clues). Clues are valid if: Digits in a cage sum up to the number on its top left (if given) and do NOT contain repeated digits; digits on arrows sum to the digit in the attached circle. (Each arrow is a separate clue, even if multiple arrows share the same circle); digits on a slow thermometer increase or stay the same as they move from the bulb to the tip; adjacent digits on a green line have a difference of at least 5; adjacent digits on an orange line have a difference of at least 4; digits in an orange shaded circle are odd; digits in a blue shaded square are even; all digits in a (larger) white circle appear in the 4 cells touching it; digits joined by a white dot are consecutive; digits joined by a black dot are in a ratio of 1:2.