user23076: Possibly confirmation bias, but I often find a game I've won involved the loss (intentional or otherwise) of a pawn, which has opened up a file for rook attack, particularly on b/g files.  Is there any catch-all term for this sort of gambit other than this title?  I wonder if anyone has statistically analysed this type of scenario.

user25351: No.
There is no specific word for a gambit that does that to open files to then win.
It would be the result of a general "gambit" giving up a pawn.
I note that you said lose a pawn unintentionally and then win.
That is not a gambit that is two beginners playing like beginners.

user17448: To mine knowledge its called "opening lines against king" in many languages this term used - no other specific name that I would have heard of in any language I know.

user15478: It is called a clearance sacrifice:

In a clearance sacrifice, the sacrificing player aims to vacate the
square the sacrificed piece stood on, either to open up lines for his
own pieces, or to put another, more useful piece on the same square.


23076: <p>Possibly confirmation bias, but I often find a game I've won involved the loss (intentional or otherwise) of a pawn, which has opened up a file for rook attack, particularly on b/g files.  Is there any catch-all term for this sort of gambit other than this title?  I wonder if anyone has statistically analysed this type of scenario.</p>
 25351: <p>No.</p>
<p>There is no specific word for a gambit that does that to open files to then win.</p>
<p>It would be the result of a general &quot;gambit&quot; giving up a pawn.</p>
<p>I note that you said lose a pawn unintentionally and then win.
That is not a gambit that is two beginners playing like beginners.</p>
 17448: <p>To mine knowledge its called &quot;opening lines against king&quot; in many languages this term used - no other specific name that I would have heard of in any language I know.</p>
 15478: <p>It is called a <a href="https://en.wikipedia.org/wiki/Sacrifice_(chess)#Sham_sacrifices" rel="nofollow noreferrer">clearance sacrifice</a>:</p>
<blockquote>
<p>In a <em>clearance sacrifice</em>, the sacrificing player aims to vacate the
square the sacrificed piece stood on, either to open up lines for his
own pieces, or to put another, more useful piece on the same square.</p>
</blockquote>
