A plane is basically a holder for a chisel, keeping the blade at a uniform angle, providing a sole to the board, and affording a handhold to work effectively. A chisel plane is a cut away low angle block plane. The blade is exposed to the plane end making it the most obvious chisel holder. The plane can cut right up to an inside corner, much as one uses a bench chisel, only with more control.
Inspiration for this plane comes from “Wooden Chisel Plane” by Norm Pollack, Fine Woodworking, March/April 2001.