Isaac Boleslavsky
Isaac Yefremovich Boleslavsky (Ukrainian: Ісаак Єфремович Болеславський, Исаак Ефремович Болеславский) (June 9, 1919 Zolotonosha, Ukraine – February 15, 1977 Minsk) was a Soviet chess Grandmaster.
Read more about Isaac Boleslavsky: Early Career, World Championship Candidate, Later Career, Legacy, Notable Games, The Boleslavsky Hole