That _relative defensive advantage in Topography_ expressed by
inaccessibility to hostile attack is materially manifested upon the
Chess-board by Corps of Position, posted upon points of different color
to that occupied by the adverse Bishop; and this advantage designates
those posts situated on a projected field of battle which may be occupied
with the maximum of security.
That _relative offensive advantage in Topography_ expressed by
accessibility to kindred attack is materially manifested upon the
Chess-board by Corps of Position posted upon points of the same color as
that occupied by the kindred Bishop; and this advantage designates those
posts situated on a projected field of battle which may be attacked with
the maximum facility.