The course (formally known as Endgame Strategy [Revised and Expanded Edition] ) is a high-level masterclass that updates Mikhail Shereshevsky's classic 1981 text with modern engine analysis and video instruction from 2018 US Champion Sam Shankland . While your specific query reference "7z 013" likely refers to a compressed file index or specific digital asset from the course's video/data set, the course itself focuses on practical planning rather than raw calculation . Course Framework & Key Principles
Systematically creating a second target on the board to overstretch the opponent's defenses, making it impossible for them to guard everything simultaneously. Chessable Shankland Endgame Strategy 7z 013
Modern analysis has refined or debunked several evaluations from the 1980s original. The course (formally known as Endgame Strategy [Revised