User-agent: Mediapartners-Google
Disallow:

User-agent: Yandex
Host: www.webrelax.net
Disallow: /images/
Disallow: /attachment.php
Disallow: /newreply.php
Disallow: /newthread.php
Disallow: /printthread.php
Disallow: /register.php
Disallow: /search.php

User-agent: *
Crawl-delay: 1
Disallow: /images/
Disallow: /attachment.php
Disallow: /newreply.php
Disallow: /newthread.php
Disallow: /printthread.php
Disallow: /register.php
Disallow: /search.php