User-agent: Yandex
Disallow: / # блокирует доступ ко всему сайту

User-agent: *
Disallow: /cgi-bin
Disallow: /wp-admin
Disallow: /wp-login
Disallow: /wp-includes
Disallow: /wp-content/plugins
Disallow: /wp-content/cache
Disallow: /wp-content/themes
Disallow: /wp-trackback
Disallow: /wp-feed
Disallow: /wp-comments
Disallow: */trackback
Disallow: */feed
Disallow: */comments
Allow: /wp-content/uploads