(B01), Alekhine's Defense (B02–05), Pirc Defense (B07–09), and the Caro-Kann Defense
: The lines are compiled and evaluated by Grandmasters, often including insights from World Champions. Standard Reference : Most professional chess databases (like encyclopedia of chess openings volume b pdf
Encyclopedia of Chess Openings (ECO) Volume B is the definitive reference for "Semi-Open Games," focusing on defenses to 1.e4 where Black does not respond with 1...e5 or 1...e6. Published by Chess Informant (Šahovski Informator) Alekhine's Defense (B02–05)