Normal sudoku rules apply. Digits along an arrow sum to the digit in that arrow's circle. Grey lines are palindromes. Adjacent digits along the green lines have a difference of at least five. Cells connected by purple renban lines form a set of consecutive, nonrepeating digits in any order.
Solution code: rows 1 and 9 (18 digits, no space)
on 16. April 2022, 03:31 by ScatterBrain
Beautiful arrangement. Nice how the logic flowed. Thanks!