Complete the grid that digits 1 to 9 occur once in every row, column and irregular region. Digit should not show up again in cells corresponding to a knight's move in chess.
Example: Given digit 1 in r6c3, digit 1 can be excluded in cell r8c2 by reasons of the knight's move rule.
Solution code: row 2 and row 3
on 29. December 2020, 13:04 by VeTaurus
I know it´s an old puzzle, but here is a link to solve it:https://f-puzzles.com/?id=y7rfo3by
on 6. February 2014, 12:35 by Oliver Strauß
Schöner Pausen-Snack.
on 4. February 2014, 19:10 by ibag
Schöne Konstruktion!