 In 1956, he took third in Poděbrady (CSR-ch, Ladislav Alster won).In 1951 and 1954, he was the chief arbiter for the World Chess Championship matches in Moscow, and also in the 10th Olympiad at Helsinki 1952, and in the second Candidates Tournament at Zurich 1953.Opočenský is also known as a theoretician.