Through the Looking Glass (Kropki and XV pairs sudoku)
(Published on 10. November 2024, 19:15 by Qodec)
Inspired by a recent puzzle called Kropki Numerals by Sotehr.
- Sudoku: Each row, column, and region indicated by thick borders in the grid must contain the digits 1 to 9 once each.
- Kropki and XV pairs: Digits separated by an X add up to 10. Digits separated by a V add up to 5. If digits are separated by a black dot, one is double the other. Digits separated by a white dot are consecutive. Not all possible dots or X/V clues are necessarily given.
You can play this puzzle online using Sudokupad: https://sudokupad.app/s0l233wyqx
Solution code: Rows 1 and 9. I.e. the 9 digits in row 1 from left to right, followed by the 9 digits in row 9 from left to right, for example: 123456789123456789
Comments
on 26. November 2024, 13:27 by Crusader175
Incredible construction!
on 22. November 2024, 15:27 by dumediat
This feels like the standard for a sudoku that might appeal to all levels of solvers. The logic is incredibly elegant to satisfy experienced solvers, while also being accessible to novice ones who are looking to stretch their limits.
on 20. November 2024, 03:44 by virus_dave
Absolutely beautiful puzzle. I found it EXTREMELY difficult and almost resorted to trial and error before finally having an epiphany that made it possible to make progress, and from there on it was reasonably steady until finished. I'm very very impressed. It's not often you see such a beautiful puzzle with such a subtle break of symmetry.
on 20. November 2024, 01:58 by mcs131313
don't know if i've ever done a puzzle that's so evenly paced throughout. I'm sure that pace is different for everyone, but it felt like a sequence of steps that were of a similar difficulty, but consistently different logic.
on 18. November 2024, 12:20 by Guvenistan
There must be some neat logic that I'm missing bc I found the mid-game break-in particularly difficult to spot.
on 17. November 2024, 23:18 by Chaka
Didn't expect any less from this being one of your puzzles, Qodec, but you blew my mind once again.. Thank you for those amazing sukdokus!
on 16. November 2024, 07:55 by Dutch_puzzle_pleb
Very nice puzzle, good difficulty
on 13. November 2024, 21:57 by cozoq
https://sudoku.coach/en/s/6Bjq
on 13. November 2024, 12:03 by Sotehr
Very beautiful, thank you for the shout-out!
on 11. November 2024, 23:23 by Hamsterbase
Beautiful puzzle, but not at all easy for me. Broke it a couple of times and had to back track. All the deductions felt hard-won, but also very fair, and at times extremely elegant. Many thanks
on 11. November 2024, 19:55 by Mr.Menace
Lovely puzzle, highly recommend this one!
on 11. November 2024, 19:00 by OGRussHood
Such simple rules, but such intricate logic. I expect nothing less from the mad genius Qodec.
on 11. November 2024, 16:33 by Mr.Menace
Lovely puzzle, highly recommend this one!
on 11. November 2024, 15:49 by Mr.Menace
Lovely puzzle, highly recommend this one!
on 11. November 2024, 15:40 by damo_89
Really lovely geometry in this
on 11. November 2024, 14:53 by Niverio
This is exactly what any approachable puzzle desires to be. Sheer elegance from start to finish.
on 11. November 2024, 10:02 by wuc
Great puzzle with some tough steps. Thx for sharing.
on 11. November 2024, 00:09 by GeorgeTheToad2
Wow that was special. Thank you Qodec.
on 11. November 2024, 00:04 by Tank
What a beautiful puzzle! The solve was so eloquent. Enjoyed every minute of it.
on 10. November 2024, 23:06 by AnomanderKarsa
Amazing
on 10. November 2024, 22:10 by sujoyku
Thank you for this fantastic puzzle, Qodec! The grid looks so sparse, but it resolves as smoothly one could dream of. Starting off felt harder, but it became quite approachable once I started asking the right questions. Gorgeous set-up!
on 10. November 2024, 21:47 by Playmaker6174
So many neat and juicy interactions throughout! I found this one quite more consistent than casual 3* there.
on 10. November 2024, 21:21 by PinkNickels
Beautiful! Just excellent!
on 10. November 2024, 20:33 by Mad-Tyas
Very nice and smooth!
on 10. November 2024, 20:27 by tallcat
Brilliantly constructed.
on 10. November 2024, 20:09 by mihel111
Lovely interactions.
on 10. November 2024, 20:05 by fuxia
Very elegant and quite approachable. Thank you!
