Born in Berdychiv, Ukraine, USSR, Gregory Kaidanov learned chess from his father at the age of six. In the 1980s he won many international tournaments while playing for the Soviet Union, and he earned the title of Grandmaster in 1988. Three years later, he and his family immigrated to the United States, settling in Lexington, Kentucky. In 1992, he had an impressive string of victories, tying for first in the Chicago Open and National Open before winning the top prizes in the World Open and the United States Open Championship.
Kaidanov also scored many great successes while playing for American teams. He played in the Olympiad six times between 1996 and 2006, winning a team bronze in 1996, a team silver in 1998, an individual silver in 2004, and a team bronze in 2006. Kaidanov also competed in the World Team Championships three times between 1993 and 2005, winning a team gold and an individual silver in 1993, and a team silver and individual gold in 1997. His major tournament victories include the 1992 World Open, 1992 U.S. Open, 2002 Aeroflot Open, and 2008 Gausdal Classic. He was the highest rated U.S. player on several rating lists between 2002 and 2005. Kaidanov, who is one of the most active Grandmaster teachers in the U.S., also coached the 2008 U.S. Women’s Olympiad Team to third place, one of their best accomplishments.