Historical note: Circa 1980 Wayne Kamara and I did a route 'Big Orange' to the right of Boving-Christensen with the goal of climbing the spectacular orange dihedral seen below with Wayne in it. The corner turned out to suitable for protection but was not itself 'climbable' and we traversed left, to where the Boving-Christensen meets Big Orange. A few days ago Wayne's brother Scott scanned Wayne's slides, and now the world can know.
I think the arrow in my topo below saying "possible variant" is the B-C.