The Kasparov's own explanations hit the highlight as he many a time hinted on mysterious causes of his defeat. It was essential for the qualified observers that his defeat was a consequence of implausible fiascos in the 2nd and 6th games, and not a result of the strong play of the supercomputer. It's hard to say what influenced Kasparov most of all. The author exhibits an interesting but not too benevolent view. Both games can raise positive emotions with a man - which is the main thing.
Many people play chess all their lives.
As to the chess algorithm , this is explained by mathematical finality of chess. This is one of the key properties of the game, and there will always be somebody wishing to test themselves against the ever elusive but still existing somewhere at the boundaries of human understanding perfection. Those who like infinity may appease themselves with the thought that chess are infinite because we may talk infinitely about it.