Olga Rubtsova

Full name	Olga Nikolaevna Rubtsova
Country	Soviet Union
Born	August 20, 1909 Moscow, Russian Empire
Title	Woman Grandmaster (1976)
Women's World Champion	1956-1958

Olga Nikolaevna Rubtsova (Russian: О́льга Никола́евна Рубцо́ва; August 20, 1909 - December 13, 1994) was a Soviet chess player and fourth Women's World Chess Champion.

She won the Soviet Women's Championship four times (1927, 1931, 1937 and 1948), and was second in the Women's World Chess Championship 1949-50, a point behind Lyudmila Rudenko. She won the title in 1956, finishing ahead of Rudenko and Elisabeth Bykova in a match tournament, before losing it to Bykova in a match in 1958.

Rubtsova also played correspondence chess, and became first Women's World Correspondence Chess Champion in 1972 (she also finished second in the next championship, only losing the title to Lora Jakovleva on tie-break, and fifth in the one after that). As of today, she remains the only player, male or female, to become World Champion in both over-the-board and correspondence chess.