Apply classic sudoku rules. Additionally, there is a loop in the grid that travels horizontally and vertically and doesn’t cross or overlap itself. In some cells the loop makes a 90 degrees angle. The digit in such a cell indicates how many steps the path travels straight before making an angle again. The green cell is part of the loop and in this cell the loop makes an angle.
A 6x6 example:
The puzzle is also available online on Penpa and f-puzzles. Enjoy solving :)
Solution code: Row 3 and column 7
on 7. February 2021, 10:01 by ibag
Superschön!
on 28. September 2020, 12:07 by ffricke
Zuerst hab ich den Weg vor lauter Bäumen nicht sehen wollen, ich dachte, das geht nicht auf. Aber es geht und ich finde das Rätsel sehr schön!
on 3. August 2020, 17:48 by glum_hippo
Those who enjoy this puzzle might also like these efforts from @Strosahl: 00039M 0003AD
on 3. August 2020, 16:22 by CannyK9
I enjoyed it, once I started focusing on the constraint and not on the given digits it flowed really nicely. It ended in a bit of a flurry due to the abundance of clues, as I saw where it was heading and jumped straight to the finished loop when it was half done, but perhaps that's part of the fun~! Thank you for the puzzle.