"Depth on different levels is so important to me. You look at a band like The Beatles, all their material has so much depth to it. And I want people to be able to run away with my melodies and get lost in them and take the lyrics and be able to relate to them."

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Ironically, the main task of chess software companies today is to find ways to make the program weaker, not stronger, and to provide enough options that any user can pick from different levels and the machine will try to make enough mistakes to give him a chance.

— Garry Kasparov