Christian writes from the perspective that it will be bad if and when machines are intelligent, he's kind of an anti Ray Kurzweil. I completely disagree with his viewpoint but his book is interesting and illustrates lots of Turing problems that I'd never considered.

He goes on to say that it will not happen that the same bot will win year after year but is proved wrong just 2 years after the book is written by Mitsuku who won in 2013,2016-2019

https://en.wikipedia.org/wiki/Mitsuku