Empress (chess) and marshal are popular names for the rook+knight compound, although a case could be made for marshal, as the word is related to "mare" (female horse) and thus fits better for a piece that can move like a knight than chancellor, which has no connection to horses. Also, there are many commonly used chess pieces that, like chancellor, begin with "C" (e.g. the cannon in xiangqi, the camel in Tamerlane Chess, the champion in Omega Chess, and the cardinal or princess), and using the name marshal for the rook+knight compound would reduce this difficulty. The name empress is more widely
Capablanca Chess starting positions are protected by at least one piece. There are also variants of Capablanca Chess that do not use the standard 10×8 board. Grand Chess is a popular variant invented by Dutch game designer Christian Freeling in 1984. It uses Capablanca Chess pieces upon a larger, 10×10 board. In 2007 Grandmaster Yasser Seirawan devised a variant (called Seirawan chess), which adds the two pieces to the standard game in a different manner. The player, after moving a piece (for example, a bishop) from the first , may immediately place either of the two pieces on the bishop's square. If