AThe San Francisco Examiner San Francisco, California Thursday, July 21, 1966 - Page 10
Russ Chess Champ Is 9th Down
SANTA MONICA (AP) —World champion Tigran Petrosian of Russia lost to Hungary's Lajos Portisch and dropped into a ninth-place tie in the third round of the Piatigorsky Cup international chess competition.
Petrosian's defeat last night left him and German Wolfgang Unzicker at the bottom of the 10-man field with 1-2 records in the 18-round tournament.
Petrosian ran into early trouble, and his Hungarian opponent increased the pressure.
After an exchange of bishops on the king's side, a knight advanced to the point where the world champion was faced with the immediate loss of the exchange and the fairly complete liquidation of the position.
Petrosian resigned.
QUIET MATCH
Boris Spassky of Russia and Sammy Reshevsky of the U.S. drew in a quiet match of 20 moves. Spassky held the advantage until he erred slightly on move 19, and Reshevsky took advantage for the deadlock.
Jan Donner of Holland and Argentina's Miguel Najdorf drew in 42 moves. For almost 20 moves, Najdorf enjoyed a slight advantage, but as the pieces were removed, an even position resulted and the players agreed on a draw.
Unzicker and Bent Larsen of Denmark drew in 38 moves. Larsen decoyed the white queen away from the defense of its king, castled on the queen side.
FORCED DRAW
Then he forced the draw by sacrificing a rook for two pawns in front of the white king, leaving it open to perpetual check.
Bobby Fischer of the U.S. and Yugoslavia's Borislav Ivkov adjourned, with Fischer having a passed queen's pawn and two connected rooks operating in white's territory, plus a bishop, to aid the attack against Ivkov's separated rooks and bishop.
Fischer will resume with a clear advantage.
The standings: Najdorf. Portisch and Spassky, 2.1; Donner, Larsen and Reshevsky. 1½-1½; Fischer and Ivkov, 1-1, and Petrosian and Unzicker 1-2.
