Natan Sharansky and Technology. As a child, he was a chess prodigy. He performed in simultaneous and blindfold displays, usually against adults. At the age of 15, he won the championship in his native Donetsk. When incarcerated in solitary confinement, he claims to have maintained his sanity by playing chess against himself in his mind. Sharansky beat the world chess champion Garry Kasparov in a simultaneous exhibition in Israel in 1996. He took his current Hebrew name in 1986, when he was freed from Soviet incarceration as part of a prisoner exchange and received an Israeli passport with his new name. Natan
Natan Sharansky becoming a refusenik, Sharansky became a human rights activist, working as a translator for dissident and nuclear physicist Andrei Sakharov, and spokesman for the Moscow Helsinki Group and a leader for the rights of refuseniks. On 15 March 1977 Sharansky was arrested on multiple charges including high treason and spying for Americans. The accusation stipulated that he passed to the West lists of over 1,300 "refuseniks", many of whom were denied exit visas because of their knowledge of state secrets, which resulted in a publication by Robert C. Toth, "Russ Indirectly Reveal 'State Secrets': Clues in Denials of Jewish Visas".