St. Louis Post-Dispatch St. Louis, Missouri Thursday, July 28, 1966 - Page 55
Dane Defeats Petrosian In Chess Tournament
Santa Monica, Calif. July 28 (AP)—Denmark's Bent Larsen has defeated world champion Tigran Petrosian of Russia in the seventh round of the Piatigorsky international chess competition. Larsen, shares the lead with Russia's Boris Spassky, each having 4½-2½ record.
Spassky beat Borislav Ivkov of Yugoslavia.
Argentina's Miguel Najdorf gained a share of third place, defeating Bobby Fischer of New York.
The other matches ended in draws: Wolfgang Unzicker of Germany Samuel Reshevsky of New York; Holland's Jan Donner and Lajos Portisch of Hungary.