Introduction: Cossack Knot
According to Wikipedia the Cossack knot.
".. is quite common in Russia and is often used instead of the bowline".
The Cossack Knot is also known as the "Eskimo Bowline". The June 2000 issue of the IGKT (International Guild of Knot Tyers) periodical calls it a "more compact and secure alternative" to the common bowline.
Bring the working end (WE) over the standing end forming a bight.
Bring the WE under both strands of the bight.
Bring WE over, under, over.
Adjust the size of the loop by pulling A or a,
Pulling on B and b (at the same time, in opposite directions) locks the loop in place.