Normal sudoku rules apply. If the digit N appears in any of the four cells adjacent to a circle then it appears exactly N times adjacent to a circle across the grid. The 3x3 box borders divide blue lines into segments; each segment along an individual line has the same sum. Adjacent digits on red lines alternate between odd and even. Adjacent digits on green lines differ by at least 5. Digits on a pink line form a non-repeating consecutive set in any order.