How to Tie an Anchor Hitch
Also known as an Anchor Bend although that’s a bit of a misnomer. This can be used to fasten a line to an Anchor, a warp to an Anchor chain or to tie your tender off onto a ring at the dock.
Careful, it can jam, but it should be fine under moderate loads.
It´s like a round turn and 2 half hitches except you thread the working end through the loop of the turns giving you more friction and a stronger hold. Finish it off with a half hitch.
Add an extra turn at the beginning if you like. Why not? In fact this will make the knot less susceptible to jamming.