The strategy and tactics associated with the open file are explained here clearly and comprehensively--how 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; these assessments teach the reader how strong chess players think--what to look for, how to assess, and how to plan. The book benefits not...