Home › Authors › Yakov Estrin 👤 Yakov Estrin 5 books Books by Yakov Estrin The Two Knights Defence (Batsf The Two Knights Defence (Batsford Library of Tournament Openings) 1983 Three Double King Pawn Opening Three Double King Pawn Openings 1982 The Gruenfeld defence 1980 Wilkes-Barre Variation, Two Kn Wilkes-Barre Variation, Two Knights Defense 1978 Open Games Open Games 1966