I have been randomly selecting public games to look at. At move 29 in Game 9574303
black is in check. He had two ways of capturing the checking pawn. One would leave him with an isolated rook pawn. The other, which in fact he chose, left him with an isolated queen pawn. There may be reasons specific to the position that black chose to do that, but let me ask if there is some rule of thumb (not specific to the position of the moment in a game) that favors, for later end game purposes, isolating one’s own rook pawn versus isolating a non-rook pawn.
I know that in the end game rook pawns tend to be less valuable. Is it fair to say that by isolating a rook pawn, one is setting up for less damage because the rook pawn was weaker to begin with? That would be the best I could come up with as a rule of thumb, but I am open to contrary ideas.
(Off-topic, but this game features what must have been a heartbreaking decision by black to abandon his advanced g pawn at move 39. This leads to black being down two rooks to one rook. But white is so concerned about black’s b pawn that white gives the rook advantage away, at which point a draw becomes inevitable.)