What is the biggest rating gap in the game where a lower-rated player won?

As the title suggests. To clarify, I am curious about cases where player A(low rating) has beaten player B(high rating). What was the highest gap between them(rating of B - rating of A).

The one that comes to mind is this:

You have to specify what RD range you're looking for.

@Deadban said in #3:

You have to specify what RD range you're looking for.
If RD means rating of individual players, then anywhere from 100 to 4000. If RD means rating difference then anything more than 1200 would be an interesting watch.

Rating Deviation (RD) explained ...
https://www.perplexity.ai/search/fa51c72f-e027-4824-8264-c4ca8d009fe5?s=u

@Toscani said in #5:

Rating Deviation (RD) explained ...
www.perplexity.ai/search/fa51c72f-e027-4824-8264-c4ca8d009fe5?s=u

Let's just say that the rating doesn't have a question mark next to it.

I played a 2000 fide when I was 1000. I beat him, salvaging a -2 position

@TheJeromeGambit said in #7:

I played a 2000 fide when I was 1000. I beat him, salvaging a -2 position
I assume this was offline?

@The_Fire_Of_Chess said in #8:

I assume this was offline?
Yeah

@The_Fire_Of_Chess said in #1:

As the title suggests. To clarify, I am curious about cases where player A(low rating) has beaten player B(high rating). What was the highest gap between them(rating of B - rating of A).

https://lichess.org/KRDhkwRD/white#67