Gennadi Sosonko
| Personal information | |
|---|---|
| Born | Gennadi Borisovich Sosonko 18 May 1943 Troitsk, Russian SFSR, Soviet Union |
| Chess career | |
| Country | Soviet Union (before 1972) Netherlands (after 1972) |
| Title | Grandmaster (1976) |
| FIDE rating | 2520 (March 2026) |
| Peak rating | 2595 (January 1981) |
| Peak ranking | No. 16 (January 1981) |
Gennadi "Genna" Borisovich Sosonko (Russian: Геннадий Борисович Сосонко, Gennady Borisovich Sosonko; born 18 May 1943) is a Russian-born Dutch chess grandmaster and writer. He has been awarded the title Grandmaster (GM) by FIDE and has twice been Dutch champion.