It's an even more interesting read this time around when I know so much more about artificial intelligence and game playing programs, having implemented a couple of them. Watching the arc of Chinook's progress is irresistible and keeps you reading way past your bedtime. The only thing I've changed my opinion slightly on is Marion Tinsley. I'm not in such awe of him anymore as I once was. As told in the book, competitive checkers has been dying for a long, long time, with nearly no new players in the last 50 years. Is it such a wonder then that one player could dominate all that time? If he was better than anyone else 50 years ago and kept playing against the same people since no new ones were joining the game, why would he suddenly start losing? Compared to chess, he had no real opposition coming up through the ranks.