Difficulties are marked according to the Logic Masters Germany scale. These are just my best guesses, so please let me know if you have a different opinion!
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X-Lines Sudoku #
Published on February 14, 2023.
Tags: Sudoku, X-Lines, Killer Cages
On an X-Line, if X is on the line then so must 10-X. Digits may repeat on a line, so 1159 would be a valid X-Line.