Logic Masters Deutschland e.V.

XV = X-ray Vision

(Published on 18. October 2022, 13:35 by sujoyku)

This is my first XV-Sudoku with a negative constraint, i.e. in the solving path one can make use of the fact that all X and V are given. Feel free to tell me in the comments how you like it. I wish you a joyful solve!

- Normal Sudoku rules apply.

- XV: Digits joined by an X sum to 10. Digits joined by a V sum to 5. All X and V are given. NEGATIVE CONSTRAINT: Digits that are NOT joined by a V or an X do not sum to either 5 or 10.

- Killer cages: Digits in a killer cage do not repeat and sum to the clue in the top left.

- Dots: Digits joined by black dot have a 1:2 ratio. (Not all black dots are given.)

Here you can solve the puzzle online:

Solve on f-puzzles

Solve on CtC

Solution code: Row 6 followed by Column 5, from left to right resp. from top to bottom (no space or comma, 18 digits in total)

Last changed on on 17. December 2022, 19:28

Solved by zorant, shangchenxi123, jalebc, mutex, SKORP17, saskia-daniela, asver, Greg, 111chrisi, DiMono, mos, Nairi, ParaNox, chain.reader, TheRiddler, kizzo212, jimblek, achim-t, jcgodart, elshan, silent492, ... Krokant, Julianl, mainakdatta, PippoForte, ArnulfKoch, karen_birgitta, Montinox, Statistica, Chishiri, snuuba, humaLautema, Cliff, flaemmchen, Carolin, zrbakhtiar, morgannamodeaura, mezkur7
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Comments

Last changed on 29. August 2023, 19:34

on 29. August 2023, 12:05 by snuuba
Damn that was hard for me, had to restart several times. Few times I managed to get the CTC app to report "Look's good as far as I can tell!", but only to find out that solution code was wrong and I had made a logical error with negative constraint... Thanks for making my head spinning :)

**
Congratulations on the solve and thank you for commenting, snuuba! Unfortunately, the CTC app does not know about the negative constraint (in f-puzzles, the conflict checker should recognize it though). I feel sorry for you and hope you had some fun despite the hiccups.
Kind regards, sujoyku

on 17. December 2022, 19:28 by sujoyku
added a CTC link

Last changed on 20. October 2022, 11:27

on 20. October 2022, 11:15 by Chelo
Very nice solving path, I liked it very much, thank you for setting and please keep on doing it!..

** Thank you for the kind and encouraging comment, Chelo. I'm glad that you enjoyed solving the puzzle and I will definitely keep on setting new ones. :)
Kind regards, sujoyku

Last changed on 19. October 2022, 13:17

on 19. October 2022, 03:26 by chain.reader
Loved it.
Not easy but not hard either.

** Thank you for your comment, chain.reader. I completely agree with your assessment about the difficulty. Although as a setter I find it sometimes hard to estimate because a solution appears much easier once you know it. :)
Anyway, I'm happy you enjoyed the puzzle.
Kind regards, sujoyku

Last changed on 18. October 2022, 21:23

on 18. October 2022, 21:17 by sujoyku
Changed the f-puzzles link to make it clickable.

Last changed on 18. October 2022, 21:15

on 18. October 2022, 20:49 by DiMono
To make the solve link clickable, you can put this in the puzzle description:

<a href='https://f-puzzles.com/?id=2qlqnjl6'>Solve on f-puzzles</a>

** Thank you for the advice, DiMono. I will change this.

Difficulty:3
Rating:90 %
Solved:48 times
Observed:7 times
ID:000BOF

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Solution code:

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