Igor Zakharovich Bondarevsky (1913-1979) was a Soviet Grandmaster (1950) and Correspondence Grandmaster (1961). He played in the USSR championship 9 times, sharing 1st with Andor Lilienthal in the 1940 championship. He tied for 6th in the 1948 Saltsjobaden Interzonal, becoming a Candidate. However, he withdrew from the Candidate’s tournament before it started. He was Spassky’s trainer in 1961 and his second in 1966 and 1969. He was an economist. His wife, Valentina Kozlovskaya, was a strong woman chess master.