But here is a repost of a comment just posted by Norbert Leisner regarding running Mediocre in ChessGUI:
Mediocre Chess Java from http://sourceforge.net/projects/mediocrechess/files/mediocrechess/There are also plenty more GUIs out there that can handle Java. It's both a bit sad and surprising that some of the major ones still doesn't...
can be easily embedded into ChessGUI / BigLion-Interface
Engines/Install Engine > select UCI1 + Java > and under "browse for engine file"= location where executable .jar file (660 KB) exists after extraction of .zip-folder - confirm the entry with "save engine option"
No extra batch-file is required, but the menu item UCI 1 + Java must be clicked simultaneously to recognize the .jar-file!