Parentless Phasing is a tool that allows to do some reasonable phasing when both parents' DNA are not available, which means, each phased parent kits will still be technically unphased (as we don't know the parents), however, instead of being completely unphased, longer segments in each phased parents' kits will be phased. This is extremely helpful for people searching their immediate family since it eliminates unphased longer compound segments matches. You can add your close relative's autosomal files into the data folder, which improves accuracy. It allows to eliminate distant relatives to help find and filter closer relations. The tool supports build 37 from FTDNA, 23andMe and Ancestry autosomal files.