Logic Masters Deutschland e.V.

I miss ATK (Anti-Knight Palindrome)

(Published on 1. December 2025, 15:52 by galium_odoratum)

This is a tribute to Abdul the Killer, who (as far as I know) invented this lovely shading rule set. Since no one else seem to publish puzzles anymore using this shading rule set, I tried to create a puzzle on my own. If you are already familiar with this kind of rule set, I expect the difficulty to be 1.5* - 2.5*.

Normal Sudoku rules apply.

Shading: Cells containing values exactly one greater than an immediate neighbour (diagonally or orthogonally) within their box are shaded. All the shaded cells are given.

Anti-Knight: Cells a knight's move apart cannot contain the same digit.

Palindrome: Digits along a grey line must read the same forwards and backwards.

XV: Digits joined by a V sum to 5. Not all Vs are necessarily given.

Play on SudokuPad

Solution code: Row 1


Solved by DanishDynamite, BenClancy, marcmees, Mathemagier, fuxia, HeyItsErin, JohnDoeJersey, jguer, luuu, thomamas, dkfan9, tryote, Llamaths, SFP, dogfarts, gxorgx, jubengo, jadezki, Stargazing Albatross, ... MaxSmartable, pescirope, ClarityC, AN_not_IO, sarabtx, whtshername, Kabuki73, scarfdoku, McMingus, esumpter, Yoica, michalil, thintheboxking, JMK, sandmoppe, tjmas, Across, Jodelbanane, Jdt112, LLX
Full list

Comments

on 27. February 2026, 20:42 by scarfdoku
That was fun. I've been going through ATK's puzzles because of this one. Thanks.

on 11. December 2025, 14:52 by Tws
Ein wunderbar fließendes Konstrukt. Eins kommt stets zum nächsten und führt zum Erfolg..

on 11. December 2025, 14:52 by Tws
Ein wunderbar fließendes Konstrukt. Eins kommt stets zum nächsten und führt zum Erfolg..

on 6. December 2025, 22:28 by ozgaz
Thanks for creating with this ruleset - I miss ATK too.

on 5. December 2025, 01:24 by itsid
uhm, maybe it's by design, but the palindrome is not needed to solve at all, not sure if the "V" is needed, frankly I doubt it...

on 4. December 2025, 11:24 by JoeyJoeJoe
01:02:40 for me - thanks for setting

on 2. December 2025, 23:22 by Exigus
That was very cool, thanks for setting!

on 1. December 2025, 23:01 by jubengo
Fun puzzle with Smooth solving once you get your head around the constraint :)

on 1. December 2025, 17:16 by DanishDynamite
Completely forgot about this constraint. Nice to see it revived!

Difficulty:3
Rating:92 %
Solved:101 times
Observed:6 times
ID:000QD8

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Solution code:

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