User-agent: Yandex
Disallow: /forum/profile.php?mode=viewprofile&u=*
Disallow: /forum/memberlist.php?*
Allow: /
Crawl-delay: 2

User-agent: *
Disallow: /forum/profile.php?mode=viewprofile&u=*
Disallow: /forum/memberlist.php?*
Allow: /