Magic Knight Killer
(Published on 5. March 2021, 12:00 by Quarterthru)
Magic Knight Killer
Normal Sudoku rules apply
Knight's move restriction: Digits can not repeat within a chess knight's move.
The cages must sum to the number in the cage and digits can not repeat.
The central 3x3 (Box 5) is a Magic Square: All rows columns and corner to corner diagonals within the Magic Square must sum to the same total.
The negative diagonal line is an "anti-diagonal" line. The same 3 digits appear on this line in all 3 boxes.
Here is a link to the puzzle on f-puzzles
Solution code: Column 2 + Row 8
Comments
on 6. March 2021, 15:59 by Quarterthru
@tsc, thanks. The goal was to use a magic square to contribute logic and not just given digits.
on 6. March 2021, 10:39 by tsc
I usually don't like magic squares as a constraint. This great puzzle changed my mind. Thanks for sharing!
on 5. March 2021, 17:52 by Quarterthru
Fixed f-puzzles rules, and changed German rule description.
on 5. March 2021, 17:20 by Tilberg
@Quarterthru: Thanks. The English version of the rule is still missing at F-puzzles. The German version here sounds a bit off. Maybe you might want to change it to "Die graue Diagonale enthält nur drei verschiedene Ziffern."
@Tilberg Thank you for the clearer German translation.
on 5. March 2021, 15:41 by Quarterthru
@Tilberg Only 3 different digits appear on the diagonal line.
on 5. March 2021, 15:39 by Quarterthru
fixed link to include diagonal
on 5. March 2021, 14:41 by Tilberg
Ich verstehe die Regel mit der Diagonale nicht. Sie fehlt auch bei F-Puzzles. - I don't understand the rule about the diagonal. It is missing at F-puzzles.
