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The Chess Complementarity Shift
The 1997–2015 history of human-computer chess, from Deep Blue's defeat of Kasparov through the era of centaur teams to the point where human participation became counterproductive — the canonical warning that complementarity is temporary.
When IBM's Deep Blue defeated Garry Kasparov in 1997, the initial response was complementarity. "Centaur chess" — human-computer teams — outperformed either humans or computers alone. The human provided strategic intuition, creativity, and the ability to identify positions where the computer's evaluation was unreliable. The computer provided tactical precision, endgame calculation, and the ability to evaluate millions of positions per second. The combination was stronger than either component. For approximately fifteen years, centaur teams dominated competitive chess analysis. Then the computers improved to the point where the human contribution became not just unnecessary but counterproductive. Adding a human to the loop introduced noise rather than signal. The relationship shifted from complementarity to substitutability, and the shift was complete.
In The You On AI Field Guide
The chess case is the clearest empirical illustration of a dynamic that Varian's framework identifies but that most discussions of AI and labor underplay. The relationship between human and machine capabilities