Efim Dmitriyevich Bogoljubov (1889 – 1952) was a leading Ukrainian chess master. He emigrated to Germany in 1926 and in 1951 he was awarded the title International Grandmaster by the World Chess Federation FIDE.

He played matches for the World Chess Championship twice, both times against Alexander Alekhine. In the first in 1929 he lost 15.5-9.5, in the second in 1934 he lost 15.5.-10.5.

The Bogo-Indian chess opening (1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ in algebraic notation) is named after Bogoljubov.

Quote

"When I am White, I win because I am White. When I am Black, I win because I am Bogoljubov."
[Bogoljubov means "beloved of God" in Ukranian.]