The shading pattern must be symmetric with respect to the two diagonals.
Otherwise standard Sudoku rules apply.
Solution code: row 9
on 16. July 2024, 06:02 by Shuhua Milk
Nice!
on 5. July 2023, 13:48 by Lorff
Lovely, thank you!
---Thank you for the kind comment and the solve.---ATK
on 5. July 2023, 13:34 by zrbakhtiar
CTC with diagonal reference line on: https://tinyurl.com/8u9zevfw
---Thanks for that. I guess that required the SudokuPad app? ---ATK
on 5. July 2023, 08:25 by ozgaz
Another really nice puzzle with a great flow. I like the ones where we have to shade them ourselves. Thanks for creating it.
---I think the to-shade puzzles add something though I personally like the relative purity of the given-shading puzzles (a point of view not necessarily shaded by other solvers).
Thanks for your solve and the kind comment. ---ATK
on 30. June 2023, 15:33 by Abdul the Killer
It's possible that I will be without the internet for a few days, so forgive me if I fail to reply in a timely fashion to any comments.