Tigran Petrosian

Tigran Vartanovich Petrosian (Armenian: Տիգրան Պետրոսյան; Russian: Тигран Вартанович Петросян; June 17, 1929 – August 13, 1984) was a Soviet Armenian[1] Grandmaster, and World Chess Champion from 1963 to 1969. He was nicknamed "Iron Tigran" due to his almost impenetrable defensive playing style, which emphasized safety above all else.[2][3] Petrosian is credited with popularizing chess in Armenia.[4][5]