As for the intuitive artificial mind, it was pure urban legend, begun in early 1968 when Alan Turing and his brilliant young colleague Demis Hassabis devised software to beat one of the world’s great masters of the ancient game of go in five straight games. Everyone in the business knew that such a feat could not be accomplished by number-crunching force. The possible moves in go and chess vastly exceed the number of atoms in the observable universe, and go has exponentially more moves than chess.

