Gennadi Sosonko

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Gennadi (Gennady) (Genna) Sosonko (born 8 May 1943, Troitsk, Russia) is a Dutch chess grandmaster.

At the beginning of his career, in 1958, he won in the Leningrad juniors championship. He moved from the Soviet Union to the Netherlands via Israel in 1972.

He won the Dutch Championship in 1973 and 1978 (jointly). In tournaments he was 1st at Wijk aan Zee 1977, 1st at Nijmegen 1978, 3rd at Amsterdam 1980, 1st at Wijk aan Zee 1981, 3rd at Tilburg 1982 and 4th at Haninge 1988. He also drew a match with Jan Timman (+1, =0, -1) in 1984.

Sosonko played eleven times for Dutch team at the Chess Olympiads in 1974-1984, and 1988-1996. He won two individual medals: gold in Haifa (1976), bronze in Nice (1974), and two medals for team: silver in Haifa (1976), and bronze in Thessaloniki (1988).

He was awarded the IM title in 1974 and the GM title in 1976.