This module was created as an alternative for Algorithm::Pair::Best, which 
probably offers more control over the pairings, in particular regarding 
ensuring the highest overal quality of pairings. Algorithm::Pair::Swiss is 
sort of dumb in this regard, but uses a slightly more intuitive interface 
and an algorithm that should perform noticably faster. The module was 
primarily designed based on the Swiss rounds system used for Magic: The 
Gathering tournaments.

WWW: http://search.cpan.org/dist/Algorithm-Pair-Swiss/