Wiktionary
king's pawn
n. (context chess English) A pawn on the E file, where the kings start the game.
Usage examples of "king's pawn".
When he returned, he discovered that White's King's Pawn had been advanced to K4.
In your hands I'm a king's pawn-how much more exposed can you get?
He opened with a conventional king's pawn move, and Kamatsu countered.
Kirk drew white and played a standard but solid king's pawn opening to a standard reply, and for a few moves they developed their pieces to control key squares, ranks, and levels, feeling each other out, trading an occasional piece evenly or for advantage of position.