Winboard protocol tutorial

[cristip]

Hello
I'm trying to build a Winboard engine from scratch but the protocol seems a little bit complicated. Does anyone have knowledge of some tutorial and/or source code that can make things easier ?
Thanks

[Pradu]

Here's a good tutorial:
http://www.tim-mann.org/xboard/engine-intf.html .

You could look at Crafty, TSCP, or anyother engine that releases its source to see how they implemented it.

[Alessandro Scotti]

You can find a (slightly simplified) diagram of the protocol here:

http://www.ascotti.org/programming/chess/xboard.htm