Cast a Shadow used to be considered legal from columns. It went from
acceptable to controversial to illegal, and now lives on only under
the name Shadow the Column. #1 and #3 do the 1/2 Zoom, Cast Off
3/4, and Spread. #2 does the Cloverleaf. #4 does the Extend (now
Circulate 1-1/2), Hinge, and Extend.
On Criss Cross Shadow the Column, everyone's role is changed the
way it is for Criss Cross the Shadow: #1 and #3 take opposite hands,
and #4 crosses hands before the Hinge.