Removing date from url using .htaccess

Question

I recently changed the permalink format of my blog so the date is removed:

http://site.com/blog/2011/01/post-name

is now

http://site.com/blog/post-name

The problem is the url with date is not redirected to new url. I tried some regular expressions in .htaccess but still get 404. Any ideas?

Answer 1

The solution was

RedirectMatch 301 /blog/([0-9]+)/([0-9]+)/(.*)$ /blog/$3

http://www.catswhocode.com/blog/10-awesome-htaccess-hacks-for-wordpress