Master Class Vol 13 - Tigran Petrosian by Dr. Karsten Müller, Marin,Reeh & PelletierTigran Petrosian became the 9th world champion in the history of chess after defeating title holder Mikhail Botvinnik in their match in 1963. Six years later, in 1969, he lost the title to Boris Spassky. But Petrosian remained one of the best players in the world for a long time, paticipating several times the Wch cycle. In his games, the native born Armenian excelled by a very correct playing style, avoiding tactical swindles and aspiring success