Lev Polugaevsky

Lev Abramovich Polugaevsky (Russian: Лев Абрамович Полугаевский, IPA: [pəlʊɡɐˈjefskʲɪj]; 20 November 1934 – 30 August 1995) was an International Grandmaster of chess and frequent contender for the World Championship, although he never achieved that title. He was one of the strongest players in the world from the early 1960s until the late 1980s, as well as a distinguished author and opening theorist whose contributions in this field remain important to the present day.