Normal sudoku rules apply. Cells separated by a single knight's move (in chess) cannot contain the same digit. Digits along an arrow must sum to the digit in that arrow’s circle. Digits may repeat along an arrow if allowed by other rules. In cages, digits sum to the small clue in the top left corner of the cage. Digits cannot repeat within a cage. Cells sharing a black dot have a 1:2 ratio (and not all possible dots are given). Clues outside the grid give the sum of the digits along the indicated diagonal. The digits on a diagonal may repeat.