1) Normal Sudoku rules apply.
2) Cells separated by a knight's move (in chess) may not contain the same digit.
3) Green lines are German Whispers lines. Consecutive digits along these lines must differ by at least 5.
4) Digits along an arrow must sum to the digit in the associated circle.You can play it here: f-puzzles. Or here: CTC-App
Solution code: Row 1 + Row 9 (18 digits)
on 7. May 2024, 20:19 by slowbiex
much harder than i anticipated