Counting circles apply: A digit in a circle indicates exactly how many circles contain that digit.
X-sums rules apply: digits outside the grid (without an arrow) are x-sums clues. Digits outside the grid indicate the sum of the first N digits, where N is the digit in the closest cell to the clue.
Little killer rules apply. Digits outside the grid with an arrow are little killer clues. Numbers outside the grid are the sum of the digits pointed to along the indicated diagonal. Digits are allowed to repeat along those diagonals as normally allowed by the other rules.
Black dots separate digits in a 1:2 ratio, and white dots separate consecutive digits. Not all dots are given.
Solution code: Digits on the diagonal in order from r1c1 to r9c9
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