SOFIA, MAY 9, NOYAN TAPAN. Veselin Topalov (Bulgaria), Levon Aronian (Armenia), Teymur Rajabov (Azerbaijan), Vasily Ivanchuk (the Ukraine), Bu Syan Chzhi (China), and Ivan Cheparinov take part in the highest, 20th-class International Chess Tournament being held on May 8-18 in Sofia. In the first tour L. Aronian's competitor is V. Topalov. The tournament will be held by two tours.

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