plaintiger: On this site the icon that represents the Chancellor is the one that has the horse's head on top of the upside down Rook's top. The Archbishop is the icon that has the strange fill up the square tassled thing. These icons are also used to represent the Cardinal and Marshall of Grand Chess. Though the pieces have different names, they move the same way. Henry Bird made up the modern version of these 8 X 10 games circa 1874. He named the two pieces Guard and Equerry. I'm not sure if Capablanca had firmed up the names to his version of Bird's Chess around 1920, which is called Capablanca Chess. It's identical to Bird's Chess except the Bishops and Guard/Chancellor and Equerry/Archbishop are in different places. Grand Chess was made up in 1972. It uses the same pieces, but has a 10 X 10 board and some different rules.

Guard = Marshall = Chancellor = (Rook+Knight)
Equerry = Cardinal = Archbishop = Janus = (Bishop+Knight)

You have a point in the rules not clearly saying which icon represent which piece. Perhaps a little diagram added to the CRC rules description would clarify it for new players. Janus Chess has its own icon. As for Capablanca Random Chess, I'm not sure why it uses those icons since the inventor of it has his own icons. Perhaps it is easier for Fencer to use the old ones. Fencer still has the notation using A and C in Grand Chess. He said he was going to change them to C and M so that they would fit the game.