Some studies out of about 56 composed by
Luděk Sedlák
(Czech, 6.1.1954)
He is also a correspondence chessplayer starting at an early age of 14.
On this website you may read a long story about that which also tells a lot about him and the rural 1968 period in Czechoslovakia.
(All his studies, more exact dates, possible corrections or cooks and exact details about sources can be found in the
Harold van der Heijden (HHdbVI))