Agree re Kasparov vs Deep Blue. He defined the KEU, the "Kasparov Equivalent Unit", the huge number of positions per unit time that the computer had to be able to score to play equivalently well to the human  world champion.  Unfortunately, Kasparaov at the time did not see things that way. He was a bitter, sore loser, had nasty things to say about the chess players who had helped IBM, and demanded a rematch, which IBM refused. It was not a proud moment for human chess players.