Why is this even a surprise, people have been participating in AI challenges for long time (like these : <a href="http:&#x2F;&#x2F;ants.aichallenge.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;ants.aichallenge.org&#x2F;</a> ) and are well aware that those are hard problems, they develop heuristics since its not computationally possible to obtain perfect solution.