What is the most painless way to change the domain and URLs on the site without losing positions?

Question

Search Engine Optimization

Good afternoon!
There is an information site with 150 articles. Almost 1k uniques per day. Only now it has come to the understanding that the domain of the site is incorrect, you need to take another one, and the articles have incorrectly formed urls, site \ article. And it is necessary: ​​site\category\article. Is there some painless way to quickly change all this and not lose ground? In theory, of course, everything is easy and simple - put down redirects and you're done. And how will it be in practice? Are redirects enough or are there easier ways?
Thanks to all who answered!

Answer 1

enough redirects. 150 articles is not a problem at all, here you can work with pens.
this is about nothing (here, of course, the subject matters). I would not bother, unless of course you plan to develop

Answer 2

I agree with Maxim, 150 articles are about nothing. Manually register in .htaccess and forget. Of course, you can also write a script, but you will spend more time on it =)
+ so that you don’t fly out of the search engine index, do not forget to specify a mirror (you are going to change the domain)

Answer 3

A redirect with an error number 301 (moved permanently) is the best way to keep a site's ranking in search engines when moving it to a new domain or changing the content management system. Forwarding can be done in several ways, depending on the software you have installed. :)