What is it about?
The optimal strategy in the guessing game "Guess Who?" is found. This is not always binary search as is commonly believed...instead the player who is currently in second place should take controlled risks to try and improve their position.
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Why is it important?
This is an example of the counter intuitive phenomenon where high risk decisions are the best choice available to the players.
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This page is a summary of: OPTIMAL STRATEGY IN “GUESS WHO?”: BEYOND BINARY SEARCH, Probability in the Engineering and Informational Sciences, June 2016, Cambridge University Press,
DOI: 10.1017/s026996481600022x.
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