Solution code: Boxes 2 and 5 in succession.
on 15. February 2022, 13:43 by Aspartagcus
Added link to CTC app and rules and title to f-puzzles link.
on 29. October 2021, 22:33 by Aspartagcus
Added label.
on 21. August 2021, 21:56 by Aspartagcus
Title change.
on 18. August 2021, 22:09 by Aspartagcus
Added "Online solving tool" tag
on 29. May 2021, 02:58 by Playmaker6174
After spotting the main logics about the arrow tips, the puzzle still has some cool logics in it which is very enjoyable :)
on 29. May 2021, 02:06 by MariaL
Cool puzzle!
on 29. May 2021, 00:28 by Aspartagcus
Fixed solution code.
on 28. May 2021, 19:43 by SudokuExplorer
It's a lovely puzzle, but I think there is an error in the solution code.
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Sorry about that! Fixed now.
Thanks for solving the puzzle!
on 28. May 2021, 16:38 by CaneloC
@SKORP17: I think he/she means "arrowhead" or "Pfeilspitze"
on 28. May 2021, 15:57 by SKORP17
was ist ein arrow tip?
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Es ist ein Pfeilspitze.