zlacker

>>ollyfg+(OP)
The secure version of this is much better and the one I use all the time. Doesn't get stuck and is quick to tie and untie.

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

>>weaksa+F2
Which is basically an upside down surgeon's knot. Just like a normal shoe-lace knot is a reef-knot using bights instead of ends.

I don't think he gives the correct knot for the surgeon's knot.

First IMO you should cross the two ends, push under the upper end, and then repeat. Then form bights and do the same action again (I use this for laces when I need them to stay fastened or when they're long and I don't want dangling aglets). However, it seems I also have been doing the surgeon's knot wrong - I make it balanced (a reef knot with an extra cross in each direction) but in every other image it's finished with a single cross of the two bights.