This new style was substantially faster than a regular breaststroke. Using this technique Jack Sieg swam 100 yards in 1:00.2. However, the dolphin fishtail kick violated the breaststroke rules set by FINA and was not allowed. Therefore, the butterfly arms with a breaststroke kick were used by a few swimmers in the 1936 Summer Olympics in Berlin for the breaststroke competitions. In 1938, almost every breaststroke swimmer was using this butterfly style, yet this stroke was considered a variant of the breaststroke until 1952, when it was accepted by FINA as a separate style with its own set of rules. The 1956 Summer Olympics were the first Olympic games where the butterfly was swum as a separate competition, 100 m (women) and 200 m (men).