Chess grandmaster Garry Kasparov uses the power of Twitter to answer some common questions about the game of chess. Why do chess players point at pieces with their middle finger? Why does the knight move the way it does? What's the more valuable piece, the knight or the bishop? Garry answers all these questions and more!

Check out Garry's MasterClass on chess:
http://www.MasterClass.com/gk

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Garry Kasparov Answers Chess Questions From Twitter | Tech Support | WIRED