This is the two column version of the classic Somerville Bowline. Like the basic Somerville, this is a subtle tie that is hard to learn but has numerous technical advantages. It has a place in the toolbox of any serious rigger.
The Somerville is one of a family of ties invented by Topologist, who has a set of excellent articles and videos about them.
1Sit with your legs 8 inches apart and your left hand palm up in between them, with the middle and index fingers extended.
Make two counter-clockwise passes around your legs and over your hand, leaving a 12" bight.
2Make a counter-clockwise loop in the standing part, passing under your extended fingers, and behind the bight.
Notice that the rope makes an X shape where it crosses over itself.
3Pass the bight over the X shape, down between your legs, around the bottom wraps, and up through the loop.
4Pull gently on the bight to collapse the tie from an oval shape to a figure 8 shape.
You can pull on the tail of the rope to shrink the loop a bit if it’s getting in the way, but leave some room for step 5.
5This is the clever part: pay attention.
Pass the bight around the upper wrap and back through the loop again.
6Pull on the standing end and the bight to snug the knot.