User-agent: Yandex
Crawl-delay: 3
Disallow: /index.php?logging=yes
Disallow: /index.php?feedback=yes
Disallow: /index.php?register=yes
Disallow: /*&sort*

User-Agent: *
Disallow: /index.php?logging=yes
Disallow: /index.php?feedback=yes
Disallow: /index.php?register=yes
Crawl-delay: 10