Is there a name for this kind of tactic?

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Avatar of DEEPFROGGER

I'm talking about the positions in which you have one or more passed pawns, so you sacrifice your Queen in the hope that you'll be up in material once you've Queened the passed pawn. Like this:

Avatar of learningthemoves

Yes, they are connected passed pawns. In terms of tactics, I've seen tactics involving connected passed pawns called "advanced pawns" tactics.

Avatar of ChessforCharityonYouTube

I agree. It could also be a sound sacrifice knowing that you will get back the queen. Maybe even simplification.