Normal sudoku rules apply.
There is a disjoint sets constraint. Digits cannot repeat in the same relative position in another box.
Gray lines are palindromes. Green lines are German Whispers (consecutive cells differ by minimum of 5. Purple lines are Renban lines (consecutive digits in any order).
F-Puzzles link: F-puzzles
CTC link: CTC
Solution code: column 1 digits followed by row 9 digits (18 digits in total)
on 2. April 2023, 19:28 by Polycarp
Changed difficulty to do feedback.
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