Ho ho ho, Santa Claus is here. And since you have been nice this year, he brought you a green gift box. Inside the box you find a killer cage which allows you to solve this puzzle.
Rules:
Colors are for aesthetics only and have no impact on the solving process!
Hints, in case the opening seems impossible:
1) The inspiration for this Sudoku stems from this Sudoku, the solution can be found here.
2) Use a version of the "Phistomefel-ring".
Enjoy!
This is the first puzzle that I post here. Feel free to give feedback, constructive criticism etc.
Solution code: Row 6, column 4 (18 digits, no spaces)
on 8. December 2020, 23:42 by Phurba
Thanks for the feedback, Wecoc! I realized now that the beginning was just stupidly hard. I will make sure that my next Sudokus won't require any brutal solving steps so that they are more enjoyable for the solver.
on 7. December 2020, 10:29 by Phurba
I guess the puzzle is too hard. I changed the difficulty to "very hard" and added two hints to the description.
on 7. December 2020, 02:41 by Wecoc
Are you sure this is Santa and not Satan? This one seems impossible to me...
[Edit] Thanks for the hints, I coundn't even start without those... and even with that it was brutal!