1) Normal sudoku rules apply. 2) Digits along the thermometer must increase from the bulb to the tips. 3) Digits along arrows sum to the digit in the attached circle. 4) The digits in the cage sum to the small number printed in the corner. Digits may not repeat in the cage. 5) Along the blue line thick box boarders divide the line into segments with equal sums. When the line re-enters a box a new segment is formed. 6) Cells separated by a knight's move in chess may not contain the same digit.