The entries were judged on aesthetics, output and incomprehensibility. One entrant per year received the Best of Show award. Entrants were advised to try and demonstrate a range of Perl knowledge, while being humorous, surprising and deceitful. Code which purposely crashed the judges' machines was discouraged.
The competition was typically divided into four categories, which, in the last contest, included:
The 3rd Annual Obfuscated Perl Contest Felix Gallo – Perl Journal (You may need to subscribe to the Perl Journal to be able to view this link, which is the source of the quote given.) http://www.foo.be/docs/tpj/issues/vol3_2/tpj0302-0012.html ↩
Simon Cozens (2005). Advanced Perl Programming. O'Reilly. p. 256. ISBN 978-0-596-00456-9. 978-0-596-00456-9 ↩