Normal Sudoku rules apply. Additionally:
1. XV: cells separated by a V sum to 5; cells separated by an X sum to 10. No negative constraint.
2. Anti-knight: cells that are a knight's move away from each other may not contain the same digit.
3. X: digits along the main, marked diagonals may not repeat.
4. X-sums: clues outside the grid show the sum of the first X digits from that direction, where X is the first digit.
If you enjoy this puzzle check out my other XV coloring puzzles: Stitched Rainbow, Stitched Rainbow II, Disjointed Rainbow, and XVXVX.
F-Puzzles: https://f-puzzles.com/?id=ye9cdd76
CTC: https://tinyurl.com/antiknightsoftheround
Solution code: Row 1, column 9.
on 31. October 2022, 01:09 by Mr.CHEN
For those who are not familiar with the anti-knight rule, there is a place where the derivation will be very difficult. I even tried it out... I spent an hour, and finally I got a wrong answer because I mistook the X-sum as a sandwich. Fortunately, I finally solved it. It's very challenging for me. I think it's worth three stars (although I haven't successfully solved the real three stars problem).
on 25. September 2022, 10:25 by Something Wellesian
So glad I finally cracked this one. Three times I got stuck in the same place and assumed I’d made a mistake. So for me (as a beginner) this was a jump in difficulty but I really liked how smoothly it ran from deduction to deduction. And it was going back to colouring that got me through in the end.
Very fun and what a revelation to finally see the way through.
on 14. June 2022, 01:05 by thoughtbyte
edit title
on 31. October 2021, 23:02 by uvo_mod
Label ergänzt.
on 28. October 2021, 17:59 by PinkNickels
Incredible. Lot of coloring, which is very difficult for we colorblind folks! Thank you for the wonderful challenge. 28:31.
--- Thank you for the feedback, I'm glad you enjoyed it! If coloring is a challenge, I suggest using F-Puzzles, putting it in setting mode, and placing the letters a-i in the corners of the boxes.