User-agent: *
Disallow: /cgi-bin
Disallow: /wp-admin
Disallow: /wp-include
Disallow: /wp-register.php
Disallow: /wp-content/plugins
Disallow: /wp-content/cache
Disallow: /wp-content/themes
Disallow: /trackback
Disallow: */trackback
Disallow: */*/trackback
Disallow: */*/feed/*/
Disallow: */feed
Disallow: /*?*
Disallow: /tag
Disallow: /page
Disallow: */page/*
Disallow: /plugins
Disallow: /archives
Disallow: /author
Disallow: /step/.....
Disallow: /search/*
Disallow: /go
Disallow: /goto
Disallow: /wp-login.php
Disallow: /uploads/
Disallow: /*.gif$
Disallow: /*.jpg$
Disallow: /*.png$
Disallow: /xmlrpc.php
Disallow: */comment-page-*
Disallow: /comments
Disallow: /sample-page
Disallow: /?attachment_id
Disallow: /img
Disallow: *.jpg
Disallow: *.gif
Disallow: *.png
Disallow: *.bmp
Disallow: /post-meta/
Disallow: /xmlrpc.php

User-agent: Yandex
Disallow: /cgi-bin
Disallow: /wp-admin
Disallow: /wp-includes
Disallow: /wp-content/plugins
Disallow: /wp-register.php
Disallow: /wp-content/cache
Disallow: /wp-content/themes
Disallow: /trackback
Disallow: */trackback
Disallow: */*/trackback
Disallow: */*/feed/*/
Disallow: */feed
Disallow: /*?*
Disallow: /tag
Disallow: /page
Disallow: */page/*
Disallow: /plugins
Disallow: /archives
Disallow: /author
Disallow: /go
Disallow: /goto
Disallow: /step/.....
Disallow: /search/*
Disallow: /xmlrpc.php
Disallow: */comment-page-*
Disallow: /comments
Disallow: /sample-page
Disallow: /wp-login.php
Disallow: /uploads
Disallow: /?attachment_id
Disallow: /img
Disallow: /post-meta/

Host: http://site.ru
Sitemap: http://site.ru/sitemap.xml
расширенный роботс, можете таким воспользоваться.