Normal sudoku rules apply. The arrow outside the grid shows the sum of the indicated diagonal. Other clues outside the grid are the sum of digits sandwiched between the 1 and the 9 in that row/column. Grey circles show odd digits. White dots join consecutive digits. Digits on thermos increase from th ebulb. Digits on arrows sum to the number in the attached circle. Digits next to each other on the green line have a difference of at least 5. The purple line joins a set of consecutive digits, not necessarily in order. The cage shows its sum.