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, ... Zeld1, amb, drmegadude, b413x, PkmnQ, YoshiKyon, Tws, belnovic, Tacocat, ElecCatMon, Crul, paranoid, addie, KelleyCook, MaxSmartable, pescirope, ClarityC, AN_not_IO, sarabtx, whtshername, Kabuki73

Full list

Comments

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!

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Difficulty:
Rating:	93 %
Solved:	88 times
Observed:	2 times
ID:	000QD8

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