title: Moved from Blogger to Wordpress, need to rewrite some URLs
body: <p>I just recently moved from Blogger to Wordpress.</p>
  
  <p>Blogger's archive URLs were something like this: <code>/2013_08_01_archive.html</code></p>
  
  <p>I need to rewrite that to <code>/2013/8</code>, I'm assuming in .htaccess. I need to do it where it will work for all past archive links to 2010 or so. Is there a way to make this rewrite work for anything with that pattern?</p>
  
  <p>For example:</p>
  
  <pre><code>/2014_11_01_archive.html -&gt; /2014/11
  /2013_10_01_archive.html -&gt; /2013/10
  /2009_01_01_archive.html -&gt; /2009/1
  </code></pre>
  
  <p>Any idea how to do this?</p>