New York Times, New York, New York, Friday, September 05, 1958
Petrosian Draws, Takes Chess Lead
Tigran Petrosian and Mikhail Tal, the two Russian grandmasters, again changed places for the lead in the interzonal chess tournament at Portoroz last night.
Petrosian drew in sixteen moves with Oscar Panno of Argentina and Tal adjourned with Fridrik Olafsson of Iceland, according to a report from Yugoslavia. Petrosian leads with 11½-6½ against Tal with 11-5.
Olafsson at 10-6, was tied by Alexander Matanovic of Yugoslavia, who drew with Bobby Fischer, United States champion, in a Ruy Lopez, lasting thirty-six moves.