Normal sudoku rules apply. Along thermometers, digits must increase from the bulb end. Digits along arrows must sum to the digit in that arrow's circle. The cages in the grid are either killer cages or look-and-say cages (or both). It is up to the solver to determine which cage is which. In a killer cage, digits cannot repeat and must sum to the small clue in the top left corner of the cage. In a Look-and-Say cage, digits CAN repeat and the small clue in the top left corner should be read as a look-and-say number (ie it says which digits are in that cage). For example, if a look-and-say cage has the clue "12" then it means there is one 2 in the cage. If it has the clue "33" then it means there are three 3s in the cage.