Definitions for "Isolated pawn"
Keywords:  pawn, friendly, chess, queen, adjacent
A P awn whose adjacent files contain no P awns of the same color. An isolated P awns is weak because it, and the square in front of it, cannot be defended by other P awns.
A pawn with no pawns of its own colour on the FILES either side of it.
A Pawn whose adjacent files contain no Pawns of the same color. An isolated Pawns is weak because it, and the square in front of it, cannot be defended by other Pawns.