Logic Masters Deutschland e.V.

Primophobia

(Published on 27. February 2024, 12:34 by Abdul the Killer)

Standard Sudoku rules apply.

Cells containing values exactly one greater than an immediate neighbour (diagonal or orthogonal) within their box are shaded (and otherwise unshaded).

Cells with lozenges contain prime numbers.

Play on CTC

Solution code: Row 1

Last changed on on 27. February 2024, 13:00

Solved by Tamuha, Myxo, galium_odoratum, sanabas, fopkovic, Abbott Abbott, IcyFruit, ReiPreguica, Luaryo, fuxia, TeamSchmidt, Azumagao, japanoise_breakfast, Greg, ole-1995a, c_sogeg, SKORP17, gfoot, ... TaeChi, ChinStrap, JonHanon, geronimo92, apokrupto, PippoForte, Azvaril, paranoid, TrymanRacing, chrysalis, Carolin, liushong, luisdias412, ManuH, Baklin, Askloomok, Leoninus, Shuhua Milk, diziet
Full list

Comments

on 12. September 2024, 03:58 by Shuhua Milk
Nice!

Last changed on 20. March 2024, 11:38

on 14. March 2024, 13:47 by ChinStrap
Great solve path. I love this constraint you have honed.
---Yeah, it's growing on me too. :) ---ATK

on 9. March 2024, 08:01 by huxi
Thank you for a lovely puzzle. It took me a long time to check the logic coz I mixed the shading rule with a version without "within their box".

Last changed on 29. February 2024, 15:04

on 28. February 2024, 07:50 by Gnarwhals
First puzzle I've solved with the shading rule so it took me a little longer than usual to break in, but once I got it it was a very fun solve!
---Thanks for the solve and the comment.

A propos nothing, when I was a young boy I came across the word NARWHAL, and not knowing the word reached for my dictionary. The whole of the entry read:

Narwhal n. A form of monodon.

MONODON was also a word with which I was unfamiliar.

I felt my consciousness turn up a notch.
---ATK

Last changed on 27. February 2024, 23:34

on 27. February 2024, 22:55 by Onkel_Dagobert
Fun puzzle, great job setting! Around 20 min. for me, could have been even a bit faster without the wife and the dog interrupting…

---My wife never interrupts me, she told me to say. Doesn't stop the cats walking all over the keyboard finding shortcuts you never knew existed.

Thanks for the kind comment.
---ATK

Last changed on 27. February 2024, 22:19

on 27. February 2024, 22:16 by wuc
Cool rule set. Great puzzle. Took me longer than usually on 2 star. Thx.
---Thanks for saying. If you've never seen this shading rule before I can see it feeling trickier than 2-star.---ATK

Last changed on 28. February 2024, 00:09

on 27. February 2024, 20:52 by Bionic Cheese
Another great one , more of these please
---Glad you liked it. There is at least one more coming. It's also quite similar in feel to two already published puzzles of mine, Trypophobia and Trypophobia II (the former is easier but I think the second is the better puzzle).

BTW you don't seem to have actually entered a solution code here(?) -- you're not in the current list of solvers!---ATK
Oops , just added it ,

Last changed on 3. March 2024, 16:38

on 27. February 2024, 20:39 by ozgaz
Thanks atk - very enjoyable - a nice palate cleanse after last week’s brute (which I’m still working away at!).

---Thanks ozgaz, good luck with the Moonlander ---ATK

Last changed on 27. February 2024, 19:37

on 27. February 2024, 18:43 by Jreg
I did it! I feel more accomplished than I probably should because my solving time of nearly 47 minutes was entirely due to not paying attention to the miniscule details, otherwise it would have been a 10-15 minute solve.
That's one thing you can be certain about when you tackle Abdul's puzzles: they're merciless. One tiny deviation and you might as well restart. I have fun solving these Sudokus nonetheless, but my ADHD brain does not fare well at all. D:
--I'm glad you stuck with it. Thanks for the solve and the comment.---ATK

Last changed on 27. February 2024, 17:01

on 27. February 2024, 16:56 by gfoot
Nice puzzle, when you figure out the constraints it flows really well
---Thanks for the solve and the comment. ---ATK

Last changed on 27. February 2024, 16:40

on 27. February 2024, 16:24 by Jreg
I have two questions because I keep failing the puzzle. 1) Is one a prime number, and 2) is there a negative constraint?

--- 1 is not considered a prime number (because, amongst other things, that would break The Fundamental Theorem of Arithmetic).

Yes there is a "negative" constraint -- shaded cells must be next to their "one less" (in their box) and unshaded cells must not.

Hope that helps, don't hesitate to ask for more clarification. Good luck!
---ATK

Last changed on 27. February 2024, 16:32

on 27. February 2024, 14:57 by fopkovic
Nice set up and a good flow once you find the entrance :)

---Yeah the break-in is fairly obvious ONCE you see it.

Thanks for the solve and the comment.
---ATK

Last changed on 27. February 2024, 16:33

on 27. February 2024, 14:40 by galium_odoratum
Beautiful puzzle, as always!
---Thanks for saying.---ATK

Last changed on 27. February 2024, 16:34

on 27. February 2024, 14:09 by AshBrown
I really enjoyed this one! Thanks
---You're welcome, knowing that they are enjoyed is why I keep making them. ---ATK

Difficulty:2
Rating:93 %
Solved:110 times
Observed:7 times
ID:000H3B

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