Doubled Rooks Chess Puzzles

Doubled rooks are two rooks placed on the same file, usually after a capture or exchange that leaves both rooks aligned. In many openings, this happens around open or semi-open files—e.g., after exchanges on the d- or c-file—so the rooks can coordinate on a single lane. For an intermediate player, the key idea is that the rooks share the same file and can turn that alignment into pressure.