If you have downloaded the repertoire as a file, it is a compressed archive. Note that official Chessable content is typically accessed via their web platform or app; .7z files often originate from third-party backups or community-shared databases.
| Author | Repertoire vs 1.e4 | Style | |--------|--------------------|--------| | | 1...e5 | Practical, imbalanced, aggressive | | Gustafsson | 1...e5 (Berlin/Marshall) | Heavy theory, solid, drawing-friendly | | Sielecki | 1...c5 (Sicilian) | Positional, low-risk | | Hansen | 1...e6 (French) | Tactical, but niche | | Shankland | 1...c5 (Sicilian Najdorf) | Ultra-theoretical, engine-checked | Chess Lifetime Repertoires Plichta-s 1 E4 E5 7z