protected function makeRanking () : void
    {       
        $result = [];

        // Calculate ranking
        $done = array ();
        $rank = 1;

        while (count($done) < $this->_selfElection->countCandidates()) :
            $to_done = [];

            foreach ( $this->_StrongestPaths as $candidate_key => $challengers_key ) :
                if ( in_array($candidate_key, $done, true) ) :
                    continue;
                endif;

                $winner = true;

                foreach ($challengers_key as $beaten_key => $beaten_value) :
                    if ( in_array($beaten_key, $done, true) ) :
                        continue;
                    endif;

                    if ( $beaten_value < $this->_StrongestPaths[$beaten_key][$candidate_key] ) :
                        $winner = false;
                    endif;
                endforeach;

                if ($winner) :
                    $result[$rank][] = $candidate_key;

                    $to_done[] = $candidate_key;
                endif;
            endforeach;

            $done = array_merge($done, $to_done);

            $rank++;
        endwhile;

        $this->_Result = $this->createResult($result);
    }