Precision count on Playchess

Some of you may not have noticed: in our live broadcast of international tournaments, when computer analysis is added to the games, there are "precision" statistics given at the end of the notes. They give the percentage of relevant (non-forced) moves that are identical with the ones a top chess engine would play. In top events we find correlations between 15% and 97%. You can compare the level of precision of different players, and also look for suspicious values. Here's how, and why you should care.

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