Normal sudoku rules apply. Digits cannot repeat on the thin blue main diagonal. Cells that appear in the same relative position of their 3x3 box may not contain the same digit. So, for example, r5c1 (the middle left cell of its 3x3 box) could not contain the same digit as r8c7 (the middle left cell of its 3x3 box.) Digits in a cage sum to the small clue in the cage’s top left corner. Digits on a pink line form a set of non-repeating, consecutive digits in any order. The 3x3 box borders divide the thick blue lines into segments; each segment along an individual line must have the same sum.