protected by fellow Pawns in an adjoining file.


Fork


A Pawn is said to fork two pieces if he attacks them
simultaneously.


Minor Piece


The Bishops and the Knights are called minor Pieces as compared
with the Rooks and the Queen.


Sacrifice


To sacrifice means to give up a man without obtaining for him a
man of the opponent or to give up a man for one of lesser value.


Discovered Check and Double Check


A discovered Check is an attack on the King caused by a man
moving out of the line of a piece which he was obstructing. If
the man discovering the Check also attacks the King the Check is