It sends an SIGINT signal... I don't really know why. I have disabled it with: feature sigint=0
The "broken pipe" bug seems to be inherent to XBoard because it does not happen with EBoard. Apparently XBoard sends a SIGINT signal to the program !!! Tiffany does not have this problem... why ?
this version only answers to 'quit', 'e2e4' and 'd2d4'. BUG? When using with XBoard, error saying 'broken pipe' after the first move...