Gary Gifford wrote on Thu, Sep 6, 2007 06:47 AM UTC:
Joe, many thanks for pointing out Douglas Silfen's Iron Guard chess. You
state the white queen is replaced by an invulnerable 1-space mover guard piece which can never be captured. This serves as another excellent example of a piece that can be used on an 8x8 board (or other size) in creating a game which is close to Fide Chess.