Rook against pawns

To put "rooks behind passed pawns" is not always good advice but very often and therefore it's a good endgame guideline. Particularly so, when things get complicated.

Charlotte Chess Center Blog: Endgame Analysis: Rook Endgames With an Extra Pawn

Puzzle Academy Content Update 3, including two complete endgames

Rook vs Pawn Endgames: 8 Must-Know Concepts

Rook and pawn versus rook endgame: Chess, Algebraic Chess Notation, Glossary of Chess, Pawnless Chess Endgame, Chess Endgame, Lucena Position, Philidor Position, Tarrasch Rule : Surhone, Lambert M., Tennoe, Mariam T., Henssonow

Chess Corner - Chess Tutorial - The Pawn

How to Win Rook vs Single Pawn Endgames

Rook and 2 Connected Pawns vs Rook Rook Endgame Fundamentals

Rook Endgames: 3 vs. 2 on the Same Flank - TheChessWorld

Rook and Other Endgames - Chess Lessons

Improve your endgame: three connected passed pawns vs rook

Knight and 2 pawns versus a rook in the endgame