Rook Endgames: 4 vs 3 on The Same Flank

All rook endgames are draw, they say… but are they really? They might be, but how many times has it happened that you drew a winning one or lost a drawish one? Probably every chess player has such examples, as well as happier situations when the game has changed in your favor. They are definitely some of the most difficult endgames and studying them could save the day more than once.