Thanks for your reply. I did look at the logs for Pychess, and it seems to be ignoring my move. I am not sure why this is happening or if I am doing anything stupid (the basic UCI loop looks simple enough, but I'm not sure why it's going wrong).

Below is the relevant log from Pychess, in case ...

Hi

I've been trying to make a simple UCI compliant chess engine. I have written a simple UCI loop to print "bestmove e2e4" when it receives the command "go" from the GUI. However, this does not seem to work (I tried on both Arena and PyChess). Is there something wrong I am doing?

Below is the ...