A Simple Desultory Killer
(Published on 14. November 2023, 12:34 by Abdul the Killer)
SHADING: Cells containing values exactly one greater than an immediate neighbour (diagonal or orthogonal) within their box are shaded. All the shaded cells are given.
KILLER: The two digits of the killer cage, A and B, index the cell[A, B] which must contain their sum, A+B. For example, if the two digits are from left to right 2 and 7, then cell[2,7] must contain 2+7 = 9.
Otherwise standard Sudoku rules apply.
Solution code: Row 1
Comments
on 21. August 2024, 04:46 by Shuhua Milk
Nice!
on 17. November 2023, 15:18 by madhupt
Brilliant puzzle, @ATK. A most satisfying solve. Very smooth once you get the hang of it but so easy to make a mistake during solve. Had to be super careful. Thanks a lot for sharing this absolute peach of a puzzle.
---And thank you for your very generous comments.---ATK
on 15. November 2023, 16:34 by vitaminz
Another banger :)
---Thanks, I think :)
(In British English,"banger" is a clapped-out old car, but also a sausage, and a cheap and mostly pointless firework (amongst other things).)
BTW, I watched the second of your videos and learned something.
---ATK
That’s the highest praise you could give me!
In American English, a banger is an excellent version of a thing (originally but no longer exclusively about a catchy song).
-vitaminz
on 15. November 2023, 13:48 by pazqo
The first time I mixed up x and y coords from the killer. I think you should make clear that x is the row and y is the column, as usually is the other way around, unless I am missing something else. But super fun anyway, thanks!
---(x,y) in a cartesian coordinate system normally refers to x horizontally, y vertically.
BUT, (r, c) when referring to an element of a table normally refers to r vertically, c horizontally.
It can be a bit of a head-**** but I don't make the rules.
Thanks for the solve.---ATK
on 15. November 2023, 02:36 by ozgaz
Thanks ATK - nice idea for a variation with the indexing killer cage. Always a pleasure to solve.
---Thanks! Surely that indexing has been used before? ---ATK
on 14. November 2023, 22:24 by frankpujo
This one took me a second try, but it still was a delight to solve as all the others from you ATK!
---Glad you got there in the end, thanks for the solve and the comment.---ATK
on 14. November 2023, 14:37 by Chelo
As always my favorite one, ATK!.. Thank you
---Thanks, Chelo, nice of you to say.---ATK
on 14. November 2023, 14:29 by fopkovic
thanks, I misunderstood the rules. I will try this one now, looks interesting!
on 14. November 2023, 13:26 by fuxia
@fopkovic r7c5 isn't 1 greater than any neighbor. The digit 1 is never shaded.
on 14. November 2023, 13:17 by fopkovic
why is row 7 column 5 not shaded? 1 neighbours 2.
---As fuxia commented (thanks fuxia), 1 is never one greater than a neighbour so is never shaded. The fact that the 1 in R7C5 is adjacent to the 2 in R8C5 is why the 2 is shaded. Good luck. ---ATK
