Kevitz defeated world champion
José Raúl Capablanca in a
simultaneous display at New York City 1924, and defeated former world champion
Emanuel Lasker in a 1928 simultaneous, also in New York. He won the
Manhattan Chess Club Championship six times: in 1929, 1936, 1946, 1955, 1974, and 1977 (according to other sources: in 1929, 1933, 1935, 1936, 1946, 1947, and 1955, and also in 1927, 1932, 1934, 1955, 1975, and 1977). From the 1920s through the 1950s, the top section of Manhattan C.C. Championship was usually at the level of a strong International tournament. Kevitz also represented the Manhattan Club in the "Metropolitan Chess League". Kevitz made his international debut at
Bradley Beach 1929, with 4/9 for 8th place; world champion
Alexander Alekhine won. Kevitz scored 7/11 at New York City 1931 for 3rd place, as
José Raúl Capablanca won. In the 16th
Marshall Chess Club Championship 1932, Kevitz scored 9/13 for 2nd place, behind
Reuben Fine. In the 17th Marshall Chess Club Championship 1933-34, Kevitz scored 8/11, tied 2nd-3rd, again behind Fine. In the
United States Chess Championship, New York 1936, Kevitz scored 7.5/15 for 8th place, as
Samuel Reshevsky won. In the team match, USA vs
USSR at Moscow 1946, Kevitz made the best American result with 1.5/2 against
Igor Bondarevsky. On the first official
United States Chess Federation rating list, July 31, 1950, Kevitz ranked third at 2610, behind only
Reuben Fine and
Samuel Reshevsky. In his later years, Kevitz was active in
correspondence chess, often playing under the pseudonym 'Palmer Phar' (he worked at Palmer Pharmacy). ==Theoretical contributions==