I’ll try words to describe the Ian Knot: Cross the laces, tuck one under the other, and pull; let go, then pick up a “bunny ear” loop in each hand, one on either side of the pre-knot; with your middle finger, push the out-side of each “ear” through the opposite loop; with thumb and middle finger of each hand, grab the loops simultaneously as they come through; pull tight. Looks like a double knot (two loops, each around the neck of the other) with each free end fed back through, forming the loops and ensuring easy undoing.