>>walter+(OP)
This is one of the small marvels of the internet. I tied mine wrong for decades and while it's not a life-changer I do love having shoes that don't constantly untie themselves these days.

https://www.fieggen.com/shoelace/grannyknot.htm

>>walter+(OP)
There's also this: https://www.ted.com/talks/terry_moore_how_to_tie_your_shoes and several other copycat videos on youtube.

Simply tie the 'bunny knot' the other way (start with a loop on the left instead of right), apparently.

Until you realize it totally depends on how you made the initial 'twist laces together' loop.

It's not easy to see from the video, but he's doing left-over-right, and so a right-loop for the main bow is of course wrong.

If you make the initial twist right-over-left and then under-and-through (as I learned), then you can tie the bow starting with the right loop, and the resulting knot does not twist vertical when tensioned, and does not come undone easily.

So yes, some people have been doing it wrong, but it's easier to fix the initial twist loop than the main bow loop imho.

Ian's knot looks even more secure though.

>>walter+(OP)
I'm not sure whether that's how I tie my laces or not as I use the "fastest" method which is demonstrated by Matt Parker on Numberphile here: https://www.youtube.com/watch?v=XPIgR89jv3Q

I think they're the same, but the method is now purely muscle memory for me and the diagrams on Ian's page don't look familiar.

Edit: Looking around Ian's site, they are different. The method I (and also Matt Parker) use is the "Ian Knot": https://www.fieggen.com/shoelace/ianknot.htm

>>walter+(OP)
Interestingly I use why I know as the Berluti knot but the method and result is different than Ian's. I feed the loose ends back through the loop whereas he does not. I love the symmetric look and tightness of the hold. Great for dress shoe-type laces. Method as I use is here:

https://m.youtube.com/watch?v=kXHemBywew4&