Rules: Normal Sudoku / Normal Variant rules apply.
Normal: Place the digits 1 to 9 once each in every row, column, and 3x3 box.
Arrows – Digits on an arrow sum to the digit in the bulb of the arrow.
Palindrome – Digits on grey lines repeat forward to backward, e.g. 123321.
XV – Digits separated by an X sum to 10. Digits separated by a V sum to 5. Not all XV clues are given.
Note – The black line is also a palindrome and is separate from the grey palindromes.
Commentary Corner: The black palindrome line is not necessary, but without it the puzzle is much less logical. My first solve check took me three hours and second solve over an hour, so I rated it 4 stars. I imagine it is 3 stars for the seasoned sudoku player. Enjoy!
Links:
Solution code: Row 1 digits left to right