R S I

Sinthome
Reidemeister moves

Drag a ring to deform it. Drag empty space to turn the link. Scroll or pinch to zoom. Right-drag a ring, or press and hold, to pull it as a whole: a free ring comes away; a linked one brings the others. Strands cannot pass through one another, so whatever you do by hand preserves the link. Cutting does not. The shadow behind the link is its flattening; the territories are read there.