Uhlmann/Schmidt: Open Files (Progress in Chess) CT the American was trained by

the American was trained by Garry Kasparov for almost a year

step by step

including contests from Minsk 1979 and other tournaments

including Kasparov's own annotations

Fundamental Tactics and Checkmates for Improvers – 738 Practical Exercises

Uhlmann/Schmidt: Open Files (Progress in Chess) CT the American was trained byThe strategy and tactics associated with the open file are explained here clearly and comprehensivelyhow files are opened, blocked, occupied, and exploited as roads along which to invade the enemy position. A brief introduction lays the theoretical foundations and is followed by illustrative games, in all of which the open file is the dominant or deciding factor. In each game there is a pause at a key position where a clear verbal assessment is given;