[Computer-go] 57%

Robert Jasiek jasiek at snafu.de
Wed Feb 3 01:24:51 PST 2016


AlphaGo is said to predict 57% of professionals' moves. How is this 
number measured and from which sample?

At some turns, there is only one correct move - at other turns, strong 
go players would say that there are several valid supposedly correct 
moves. This is one of the reasons why 100% cannot be the optimum but a 
smaller percentage must be the best.

Pro players, or players of the database sample (incl. real world 3d 
players being 9d on KGS), make mistakes. A neural net learns from a 
sample and therefore also learns the mistakes. This is the most 
important reason why 100% cannot be the optimum but a smaller percentage 
must be the best.

(Roughly) which percentage is optimal? Why? Is the optimum greater or 
smaller than 57%?

-- 
robert jasiek



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