private static Move ForwardLeftForWhite(int r, int c, Board board){
        Move forwardLeft = null;
        if( r<Board.rows-1 && c>=1 &&
                board.cell[r+1][c-1] == CellEntry.empty
          )
        {
            forwardLeft = new Move(r,c, r+1, c-1);
        }
        return forwardLeft;
    }