Vasily Ivanchuk moved closer to winning the international tournament when he drew with compatriot and former world champion, Anatoly Karpov, after 30 moves in a Ruy Lopez opening.
The tournament is being held in Linares, Spain.Boris Gulkov of the United States drew against Andrei Sokolov of the Soviet Union after 40 moves of the Reti opening. Alexander Beliavsky of the Soviet Union defeated his compatriot Artur Yusupov after 40 moves in a Dutch defense.
Britain's Nigel Short adjourned against Ljubomir Ljubolevic of Yugoslavia after 40 moves of a Ruy Lopez and Jan Timman of the Netherlands adjourned against Johan Hjartarson of Iceland after 40 moves of the Sicilian defense.
Lajos Portisch of Hungary had a bye for the round.
In an adjourned game from the eighth round, Timman and Sokolov drew without a continuation and in an adjourned game from the ninth round, Hjartarson resigned against Ivanchuk.
Standings after the 10th round were:
1. Ivanchuk, seven points
2. Karpov, 51/2 points (one game adjourned)
3. Ljubolevic, 41/2 points (two games adjourned)
4. Yusupov, four points (one game adjourned)
5./6. Timman and Short, 31/2 points (two games adjourned)
7./8. Gulkov and Portisch, 31/2 points (one game adjourned)
9. Hjartarson, three points (two games adjourned)
10. Beliavsky, three points (one game adjourned)
11. Sokolov, three points
Victor Korchnoi, Soviet-born and now a Swiss citizen, withdrew from the tournament after organizers denied his request to exclude a Soviet judge.
Korchnoi told reporters he had sent a letter to the tournament organizers saying he would not play if Victor Baturinsky of the Soviet Union was the principal judge.
Korchnoi had problems with Baturinsky, a senior official of the Soviet Chess Federation, when he played Karpov in 1974, two years before he sought asylum in the West. Karpov won 121/2-111/2.
In his book, "Chess is My Life," Korchnoi accuses Baturinsky of partiality in the match, in which he played Karpov for the right to play Bobby Fischer of the United States for the world title.
Korchnoi was scheduled to meet Ivanchuck of the Soviet Union in the Linares opening match. "I will only admit, as a great concession, that the organizers could make Baturinsky a guest of honor, but nothing more," Korchnoi said.
Julio Gallardo, president of the Linares tournament organizing committee, said that he had not received Korchnoi's letter.
Luis Rentero, technical director of the tournament, proposed that Francisco Mena of Spain be the judge in the matches played by Korchnoi. But Korchnoi refused.
Korchnoi left for Madrid after a meeting between players, judges and members of the organization, who confirmed Baturinsky's position of principal judge.
Korchnoi said he felt insulted by the organizers.
British grandmaster Nigel Short defeated the former world champion, Anatoly Karpov, Soviet Union, in the first round and earned $1,000 for his win.
After Korchnoi abandoned the tournament without playing a match, the roster was down to 11 players including five Soviet grandmasters.
The world champion, Gary Kasparov, visited the Linares tournament and called on former world champion Bobby Fischer of the United States to resume tournaments, 14 years after retiring a grandmaster.
U.S. grandmaster Boris Gulko - who has the status of a "faculty grandmaster" on the Harvard University faculty - said Kasparov had written to Fischer ahead of his scheduled trip to Washington, D.C.
While in Washington, Kasparov asked the support of U.S. Senators intransferring the organization of next year's world championship from the International Chess Federation (FIDE) to the Grandmasters Association.
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