It took me all day, but I finally figured out how to tie knot #785 from The Ashley Book of Knots!
Check out the photos and video at the end of this post to see how to tie it.
I was initially interested in it because of WhyKnot’s video on tying #784 where he mentioned there was an error in the original diagram in the book. I wanted to see what the error was, and noticed the extension to knot 784: the long or elongated crown and diamond knot.
The book says you just need to go around one more time, but exactly where and how… it took me a while to figure out. It turns out the error in the diagram is at the same stage of each knot: just before putting the ends through the crown. The ends should go through the middle of the knot before going into the crown in both 784 and 785.