http://www.mustad.no/action/flyofthemonth/archive/cz_nymph.htm
This site leads to a pretty informative Part 1/2 on how to actually fish the Czech or Polish technique. Several small but precise tweaks suggested on how to manipulate the line and what not to do.
http://www.mustad.no/action/fishing_tips/fish_czech1.htm
don’t know what Chech’s have done to deserve the credit
I think they took a Polish or perhaps Slovak pattern and successfully used it dredging the riffles in an International competition…I think that is a what an envious Pol told me {:>) Just joking…I think part of it is true….