Dee ihe na-esote paragraf a - N'afọ 1946, mgbe ọ dị afọ 21, Yanofsky banyere asọmpi mbụ kachasị elu nke oge agha, na Groningen, ma merie onye mmeri Soviet na onye mmeri asọmpi Mikhail Botvinnik, na-emeri ihe nrite. N'ime afọ abụọ sochirinụ, ọ gbara ọtụtụ asọmpi ndị ọzọ na Europe, ebe nsonaazụ ya kachasị mma bụ ebe nke abụọ n'azụ Miguel Najdorf na Barcelona 1946. Yanofsky nọchitere anya Canada na Interzonals emere na Saltsjöbaden 1948 na Stockholm 1962. O meriri n'asọmpi Briten n'afọ 1953. Na Dallas 1957 chess tournament, Yanofsky nwetara akara ukwu mbụ ya site na mmeri Samuel Reshevsky, Friðrik Ólafsson na Larry Evans. Egwuregwu ya na Tel Aviv 1964 Olympiad
mere ya onye isi ukwu nke abụọ ya, na aha ya, si otú ahụ bụrụ onye isi ukwu mbụ a zụlitere na British Commonwealth.