Pawns move without capturing one square diagonally, and may do so both forwards and backwards. Pawns capture one square vertically, again this may be forwards or backwards. Pawns that are on a 2nd, 3rd or 4th row (from the viewpoint of the owning player) may move (without capturing) also two squares diagonally. There is no en passant capture, promotion of pawns is as usual.
The other pieces (queen, rook, knight, bishop, queen) however may not move backwards. This means effectively that queens, rooks, and kings can only move sideways, once they reach the last row of the board, and that knights and bishops cannot move at all from the last row.