Normal sudoku rules apply. Normal thermo rules DO NOT apply. Each thermo consists of at least two numbers (each possibly multi-digit, with the unit digit towards the tip) that increase - at least doubling and at most tripling each time. Cells with an arrow pointing to an adjacent thermo cell must indicate how many digits the adjacent number on the thermo has. In cages, digits must sum to the clue in the top left corner of the cage.