There is one place where it's dynamic, which is that if your very first click is on a mine, then it'll relocate it to the upper-left corner (or the next available spot).

I'm now questioning my memory because I'm convinced I have hit a mine on the first click before ...

Maybe a clone?

I'm surprised it's done this way... I'd expect that it just doesn't generate the mines until the first click.

Nice.

I once wrote a “clone”[1] and when someone here pointed out the “first click is safe” feature, I implemented it by putting the reshuffle inside a while. Never thought of the first click as being “pre game”...

[1] https://www.ronilan.com/bugsweeper/

Modern versions of Minesweeper actually makes it so nothing _around_ your first click is a mine, so you always reveal more than one square.

https://guangcongluo.com/dminer/

is a version I wrote while trying to teach myself React.

There’s the possibility of painting yourself into a corner (generating an inconsistent board) if you do it on the fly. It could be done, but it’s probably just simpler to generate it at the outset and then do lookups.

edit: unless you just meant that the adjacency numbers could be generated on the fly, in which case painting yourself into a corner isn’t a concern

Do you mean something like this? (so you can always work out something logically ie no guessing) https://www.chiark.greenend.org.uk/~sgtatham/puzzles/js/mine...

The fact that it doesn't can be exploited by running it in a virtual machine and using the snapshot feature to go back in time. That's how we made this Website is Down video: https://www.youtube.com/watch?v=1SNxaJlicEU