User-agent: *
Disallow:

User-agent: Yandex
Disallow: /

User-agent: YandexBot # will be used only by the main indexing robot
Disallow: /*id=

User-agent: Yandex # will be used by all Yandex robots
Disallow: /*sid= # except for the main indexing robot

User-agent: * # won't be used by Yandex robots
Disallow: /cgi-bin