Rooks belong behind passed pawns

It was Dr Tarrasch who formulated this famous principle and though there are, of course, exceptions and positions in which the rook is better placed on the side of the pawn, in rook endings this is still a very good rule of thumb.

What's the difference between a rook in front of vs. behind enemy passed pawns in an endgame? : r/chessbeginners

Plus piece vs passed pawn

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Rooks belong behind passed pawns

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What's the difference between a rook in front of vs. behind enemy passed pawns in an endgame? : r/chessbeginners