Short-row heels
From what I could gather from the literature there are only two types of short-row heels, then there are many variants of these two types. They vary mainly in construction and to distinguish them I'll name them † the standard short-row heel and the boomerang heel (the trapezium when stretched looks like a boomerang). The figure shows their respective constructions schematically (the standard method is on the left). † A small disclaimer: as far as I know there is no standard naming for these two classes of methods. As most often in the world of knitting terms, there seems to be some confusion with people using the same term to name different techniques and different terms for the same technique. I don't claim the terminology I've chosen to be either the correct one or the best one in any way. The standard method is obviously symmetric and therefore it can be used in socks worked from the cuff-down or the toe-up. The good news is that the boomerang method can be ...