. . . . . . . . . . . . . . . . . . . . . . . . . "1977-02-15" . "Grandmaster(1950)" . "1919-06-09" . . . . . "Isaac Yefremovich Boleslavsky" . . . . . . . . . "1977" . . . "Isaac Boleslavsky" . . . . . "Boleslavsky" . "1919" . . "Isaac Boleslavsky" . . . . . "Boleslavsky, Isaac" . "Isaak Boleslavsky" . . . . . . . . . . . . . . . . . . . . . .