board. With enough solitary practice, the mental representations become so useful and powerful in playing the game that the major thing separating two players is not their intelligence — their visuospatial abilities, or even their memory or processing speed — but rather the quality and quantity of their mental representations and how effectively they use them. Because these mental representations are developed specifically for the purpose of analyzing chess positions and coming up with the best moves — remember, they are usually developed through thousands of hours of studying the games of
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How mental reps matter
