This is a long-standing bug: apparently, many chess engines do not work with ChessX. Actually, yet I have to find a single chess engine not working. Instead, *any* engine may or may not work depending on the order in which it is added in ChessX.
A detailed description of the bug can be found here:
http://tinyurl.com/nn383m
According to attached description, most engines work (please report non-working engines in separate bug reports), but engine management is broken.
This long standing bug - causing almost every problem with the engines - now is gone. Yep!!!
This long-standing bug - which caused almost every problem with engines - is now solved. Yep!!!