Coincidentally the latest Phrack has a tight little chess playing AI written in just 256 bytes: <a href="http:&#x2F;&#x2F;phrack.org&#x2F;issues&#x2F;69&#x2F;4.html#article" rel="nofollow">http:&#x2F;&#x2F;phrack.org&#x2F;issues&#x2F;69&#x2F;4.html#article</a>