In the initial position we have a Rook attacking a Knight and via "X-ray," attacking" a Bishop. The Bishop here is supposedly blocking the pin. "Pawn Attacks" Knight and Knight "Runs" The Knight here is a "Fig Leaf" in that it is blocking the capture of a weak piece "The Fig," in this case the Bishop, behind it. The removal of the Guarding"Knight is a "Self Pin Type B." If BxB then the pawn recaptures. By moving the Bishop, the Knight becomes "Self Pinned, Type c."
