User-agent: *
Disallow: /index.php
Disallow: /*?sort=date_desc$
Disallow: /*?sort=title_asc$
Disallow: /*?sort=url_asc$
Disallow: /*?sort=
Disallow: /index.php?sort=
Disallow: /rss.php

User-agent: Googlebot
Disallow: /index.php
Disallow: /*?sort=date_desc$
Disallow: /*?sort=title_asc$
Disallow: /*?sort=url_asc$
Disallow: /*?sort=
Disallow: /index.php?sort=
Disallow: /rss.php