Still trying the TProcess and Pip stuff on MorphOS (I do not want to steal the gdb from Charlie though 😉 ). I remembered, a while before someone told me that he has a shell based chess program for MorphOS compiled Predateur. It uses a rather common command line API (uci). I also found a UCI GUI written in FreePascal the GUI itself is made with fpGUI, but that’s not a big problem. I changed the GUI to MUIClass and try it. It did not work directly on the first try, there are some problems with the TProcess. I have to think about that, how to solve. But with a little bit tweaking it works now. You can play chess nicely. The author of the GUI also has some uci compatible engines written in FreePascal, but they sometimes crash after some moves. But this Predateur one works quite nicely. Disclaimer: I’m very bad at chess, never really played, barely know the rules.