Hello,
I asked the Convekta-ChessOK support (Alexander Zhuravlev), but no Houdini freeware is hosted there. And it seems that my email to the author remains without reply until today. If anynody knows a valid download-link of previous freeware editions of Houdini, please let me know.
I will add it here: http://computer-chess.org/doku.php?id=c ... pport_list
Best wishes,
Norbert