| The RS-2 is developed by Rim Chung, a native
of Seoul, South Korea, who became a resident of Denver in 1968. At that time, Chung was
noted as an expert on fishing the famed South Platte River in the Decker's area. Chung
first devised the RS-1, a pattern to imitate midge nymphs. It was similar to the RS-2, but
it had "only the suggestion of a wing case, as opposed to the RS-2's upright,
slightly angled, stubby wing." The RS-2, signifying "Rim's Semblance No. 2"
was a generic nymph or pupa pattern designed in 1974. As described in a local Colorado
newspaper article on Chung and the RS-2: "It had a configuration suggestive of an
emerging insect just beginning to hatch from the stream bottom. It could be the semblance
of more than one insect -- in small sizes, a mayfly nymph or a midge pupa. In larger ones,
it could pass for a stonefly, or if fished in an active manner, even a caddis emerger.
"Chung began to catch 10, 12 or more fish per day on the Platte, and, eventually,
the RS-2 became the only fly that Chung used. He carries only one box of RS-2 patterns in
different sizes and colors; he did not use a strike indicator. "Chung usually
dead-drifted the RS-2 deep; however, he would take the weight off the leader and fish it
on the surface and catch trout when they were rising. His RS-2 also did well in the
Colorado Roaring Fork and Eagle Rivers as well as the streams in Yellowstone."
"It's just a semblance of an insect", Chung said.
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