Normal sudoku rules apply: place the digits 1 to 9 in every row, column, and 3x3 box.
Anti-knight: Cells separated by a knight's move (in chess) may not contain the same digit.
Killer: Digits in a cage sum to the small clue in the cage's top-left corner. Digits may not repeat within a cage.
Solve online in SudokuPad.
Solution code: Row 2 (9 digits)
on 18. September 2026, 18:22 by LARSPARIS
Agreable
on 3. August 2026, 17:36 by michael_787
For me, a perfect 1*. A clear solve path, solvable in less than 10 minutes. Thanks for setting.
on 2. August 2026, 01:02 by SanFranSam
Finished in just over 6 minutes. Unless i did something wrong, i never used the anti-knight rule. And i solved the puzzle without even touching the middle three rows. ¯_(ツ)_/¯
on 1. August 2026, 17:31 by macintux
Anti-knight was very powerful. Very fast solve, thanks. Definitely no more than 1 star if you’re familiar with the negative constraint.
on 1. August 2026, 12:30 by Wuschel
Very nice and smooth, thank you!
on 1. August 2026, 05:19 by vitray
This is somewhere between 1 and 2 difficulty
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