Nginx Wordpress Rewrite rules.

wordpress.conf

server {
        server_name example.com ;

        access_log   /var/log/nginx/example.com.access.log;
        error_log    /var/log/nginx/example.com.error.log debug;

        root /var/www/example.com/htdocs ;
        index index.php;

        if (!-e $request_filename) {
                rewrite /wp-admin$ $scheme://$host$uri/ permanent;         
                rewrite ^/wordpress(/[^/]+)?(/wp-.*) /wordpress$2 last;      
                rewrite ^/wordpress(/[^/]+)?(/.*\.php)$ /wordpress$2 last;
        }

        location / {
                try_files $uri $uri/ /wordpress/index.php?$args ;
        }

        location ~ \.php$ {
                try_files $uri /wordpress/index.php;
                include fastcgi_params;
                fastcgi_pass 127.0.0.1:9000;
        }

        location ~* ^.+\.(ogg|ogv|svg|svgz|eot|otf|woff|mp4|ttf|rss|atom|jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav|bmp|rtf)$ {
                access_log off; log_not_found off; expires max;
        }

        location = /robots.txt { access_log off; log_not_found off; }
        location ~ /\. { deny  all; access_log off; log_not_found off; }
}