1973 Interzonal Tournaments
Two 18 player, single round robin Interzonals were played with the top three from each qualifying for the Candidates Tournament. Leningrad and Petropolis, Brazil were the venues.
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June 1973 Interzonal, Leningrad Rating 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Total Tie break 1 Viktor Korchnoi (Soviet Union) 2635 - ½ 1 ½ 1 1 ½ 1 ½ 1 1 1 ½ 1 0 1 1 1 13½ 108.25 2 Anatoly Karpov (Soviet Union) 2545 ½ - ½ 1 ½ ½ 1 ½ 1 ½ 1 ½ 1 1 1 1 1 1 13½ 104.25 3 Robert Byrne (United States) 2570 0 ½ - ½ ½ 1 ½ ½ ½ 1 1 1 ½ 1 1 1 1 1 12½ 4 Jan Smejkal (Czechoslovakia) 2570 ½ 0 ½ - 0 0 ½ ½ 1 1 0 1 1 1 1 1 1 1 11 5 Robert Hübner (West Germany) 2600 0 ½ ½ 1 - 0 ½ 1 1 ½ ½ 1 ½ 1 ½ ½ 0 1 10 79.50 6 Bent Larsen (Denmark) 2620 0 ½ 0 1 1 - 1 0 0 ½ 0 1 1 ½ 1 ½ 1 1 10 75.00 7 Gennady Kuzmin (Soviet Union) 2565 ½ 0 ½ ½ ½ 0 - 1 0 ½ ½ ½ 1 ½ 1 1 1 ½ 9½ 8 Mikhail Tal (Soviet Union) 2655 0 ½ ½ ½ 0 1 0 - 1 ½ 1 1 ½ 0 0 1 0 1 8½ 67.25 9 Svetozar Gligorić (Yugoslavia) 2595 ½ 0 ½ 0 0 1 1 0 - ½ ½ ½ ½ 1 ½ 0 1 1 8½ 64.00 10 Mark Taimanov (Soviet Union) 2595 0 ½ 0 0 ½ ½ ½ ½ ½ - ½ 1 ½ ½ 1 ½ 1 ½ 8½ 63.00 11 Miguel Quinteros (Argentina) 2480 0 0 0 1 ½ 1 ½ 0 ½ ½ - 0 0 ½ ½ 1 ½ 1 7½ 55.75 12 Ivan Radulov (Bulgaria) 2510 0 ½ 0 0 0 0 ½ 0 ½ 0 1 - 1 1 ½ ½ 1 1 7½ 49.50 13 Wolfgang Uhlmann (East Germany) 2550 ½ 0 ½ 0 ½ 0 0 ½ ½ ½ 1 0 - ½ ½ ½ ½ 1 7 51.75 14 Eugenio Torre (Philippines) 2430 0 0 0 0 0 ½ ½ 1 0 ½ ½ 0 ½ - ½ 1 1 1 7 45.00 15 Josip Rukavina (Yugoslavia) 2460 1 0 0 0 ½ 0 0 1 ½ 0 ½ ½ ½ ½ - 0 1 ½ 6½ 16 Vladimir Tukmakov (Soviet Union) 2560 0 0 0 0 ½ ½ 0 0 1 ½ 0 ½ ½ 0 1 - ½ 1 6 17 Guillermo Estévez Morales (Cuba) 2385 0 0 0 0 1 0 0 1 0 0 ½ 0 ½ 0 0 ½ - 1 4½ 18 Miguel Cuéllar (Colombia) 2400 0 0 0 0 0 0 ½ 0 0 ½ 0 0 0 0 ½ 0 0 - 1½
Korchnoi, Karpov, and Byrne qualified for the Candidates Tournament.
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July-August 1973 Interzonal, Petropolis Rating 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Total Tie break 1 Henrique Mecking (Brazil) 2575 - ½ ½ ½ 1 ½ ½ 1 ½ ½ 1 ½ ½ 1 ½ 1 1 1 12 2 Efim Geller (Soviet Union) 2585 ½ - ½ ½ ½ 1 ½ ½ ½ 1 ½ ½ 1 1 0 1 1 1 11½ 89.50 3 Lev Polugaevsky (Soviet Union) 2640 ½ ½ - 1 ½ ½ ½ ½ ½ ½ ½ 0 1 1 1 1 1 1 11½ 88.00 4 Lajos Portisch (Hungary) 2645 ½ ½ 0 - ½ ½ ½ ½ 1 ½ 1 ½ 1 ½ 1 1 1 1 11½ 85.50 5 Vasily Smyslov (Soviet Union) 2600 0 ½ ½ ½ - 0 1 ½ ½ 1 ½ ½ 1 1 ½ 1 1 1 11 6 David Bronstein (Soviet Union) 2585 ½ 0 ½ ½ 1 - 0 ½ ½ 1 1 1 ½ 1 ½ 1 1 0 10½ 7 Vlastimil Hort (Czechoslovakia) 2610 ½ ½ ½ ½ 0 1 - 1 0 0 1 ½ ½ ½ 1 ½ 1 1 10 8 Vladimir Savon (Soviet Union) 2570 0 ½ ½ ½ ½ ½ 0 - ½ 0 1 1 ½ ½ 1 1 ½ 1 9½ 9 Borislav Ivkov (Yugoslavia) 2535 ½ ½ ½ 0 ½ ½ 1 ½ - ½ ½ ½ ½ ½ ½ 1 ½ ½ 9 72.75 10 Ljubomir Ljubojević (Yugoslavia) 2570 ½ 0 ½ ½ 0 0 1 1 ½ - 0 1 ½ 0 1 ½ 1 1 9 67.50 11 Samuel Reshevsky (United States) 2575 0 ½ ½ 0 ½ 0 0 0 ½ 1 - 1 ½ ½ 1 1 ½ 1 8½ 12 Oscar Panno (Argentina) 2580 ½ ½ 1 ½ ½ 0 ½ 0 ½ 0 0 - ½ ½ ½ ½ 1 1 8 62.50 13 Paul Keres (Soviet Union) 2605 ½ 0 0 0 0 ½ ½ ½ ½ ½ ½ ½ - ½ ½ 1 1 1 8 54.25 14 Florin Gheorghiu (Romania) 2530 0 0 0 ½ 0 0 ½ ½ ½ 1 ½ ½ ½ - 1 ½ ½ 1 7½ 15 Peter Biyiasas (Canada) 2395 1 ½ 0 0 ½ ½ 0 0 ½ 0 0 ½ ½ 0 - ½ 1 1 6½ 16 Tan Lian Ann (Singapore) 2365 0 0 0 0 0 0 ½ 0 0 ½ 0 ½ 0 ½ ½ - ½ 0 3 22.00 17 Werner Hug (Switzerland) 2445 0 0 0 0 0 0 0 ½ ½ 0 ½ 0 0 ½ 0 ½ - ½ 3 20.25 18 Shimon Kagan (Israel) 2405 0 0 0 0 0 1 0 0 ½ 0 0 0 0 0 0 1 ½ - 3 19.50
Mecking qualified outright for the Candidates Tournament, while the three players tied for second place contested a playoff in Portoroz for the remaining two spots.
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September 1973 playoff, Portoroz Rating 1 2 3 Total 1 Lajos Portisch (Hungary) 2650 - 11== =1== 5½ 2 Lev Polugaevsky (Soviet Union) 2625 00== - 110= 3½ 3 Efim Geller (Soviet Union) 2605 =0== 001= - 3
Portisch and Polugaevsky qualified.
Read more about this topic: World Chess Championship 1975