Pawns move differently than other pieces. Unlike all the other pieces, pawns cannot move backwards. Most of the time, a pawn moves by going up a single square, but the first time each pawn is moved from its starting place, it can go forward two squares. Pawns cannot use the first two-square move to jump over a square with another piece on it or to capture. Any piece in front of a pawn, white or black, stops its moving. If a pawn touches the other side it is exchanged by either a queen, a rook, a bishop or a knight. 