Chess has been played for more than one and a half ____. The game has had its name “chess” since it spread to ____. Chess has been known in the Arab world since the 7th ____. Different rules were created in different ____. Chess was used as an ____ for different social classes performing their proper roles. The relatively weak piece of advisor was recast as the more powerful ____. With the Enlightenment era, the game moved from royal courts to ____. Deep Blue’s triumph over Garry Kasparov in 1997 was the first time a machine had defeated a ____. Today, chess software is capable of consistently defeating the best ____.

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