I think 'Anti-Fort Sudoku' should be renamed 'Big Neighbours Sudoku'.
There was a contest called 'Small Neighbours Sudoku' which had the exact opposite rules.
I didn't remember those, and missed the Dutch Championship last year. Thankfully, its still early enough that it can be renamed so I'll do that and publish in a bit.
How do I share the image of Instruction Booklet Big Neighbours Sudoku and almost solved it just missing the ending logic can somebody help
While posting on this forum, you'll find an option to "Attach a file after posting" at the bottom left. You can use that option to share the image here.