can a pawn take a piece moving backward
The Pawn on its first move can either one or two squares. After the first move the Pawn can only move one square at a time. The Pawn can capture by moving diagonally one square forward, either to the left or right diagonal. The Pawn can never move or capture backward. Every other piece can move forward or backward. The En Passant Pawn capture may be the least known capture in chess rules. An example of En Passant: the black opponent has a Pawn in position at C4 and white decides to move his Pawn sitting on B2.