Anyways, best chess engines are the ones that have the best opening books, end game tables and have enough power to evaluate as manny lines as possible as deep as possible. It's my understanding that Watson is just a very powerful search engine with emasculate voice recognition.
IBM's Watson is a computer using a revolutionary algorithm, that studies humans and learns how THEY play. More here: https://www.youtube.com/watch?v=_Xcmh1LQB9I
If it were to begin to be used for a chess engine, do you think it would be the best?