Career
In 1943 and 1944, he published an analysis of the Two Knights Defense in Chess Review. His main career was as an explorer of remote regions, from which he brought back zoological and botanical specimens. In both events he out-scored Isaac Kashdan.
Explorer
In 1932, he embarked on a series of ten expeditions to the jungles of British Guiana and Venezuela to collect zoological and botanical specimens.
Stockbroker
In 1939, he returned to New York to work on Wall Street as a stockbroker and resumed his chess career. He played in several radio matches: United States of America versus
Union of the Soviet Socialist Republics (1945), New York versus Louisiana Plata (1947), United States of America versus
Yugoslavia (1950). Although he was never awarded an international title in chess, his peak playing strength places him at or close to the International Master class.